As adults age, their performance on many psychometric tests changes systematically, a finding that is widely taken to reveal that cognitive information-processing capacities decline across adulthood. Contrary to this, we suggest that older adults'; changing performance reflects memory search demands, which escalate as experience grows. A series of simulations show how the performance patterns observed across adulthood emerge naturally in learning models as they acquire knowledge. The simulations correctly identify greater variation in the cognitive performance of older (...) adults, and successfully predict that older adults will show greater sensitivity to fine-grained differences in the properties of test stimuli than younger adults. Our results indicate that older adults'; performance on cognitive tests reflects the predictable consequences of learning on information-processing, and not cognitive decline. We consider the implications of this for our scientific and cultural understanding of aging. (shrink)

BackgroundThe cognitive outcomes induced by subthalamic nucleus deep brain stimulation (STN-DBS) remain unclear, especially in PD patients with mild cognitive impairment (MCI). This study explored the cognitive effects of STN-DBS in PD patients with MCI.MethodsThis was a retrospective cohort study that included 126 PD patients who underwent STN-DBS; all patients completed cognitive and motor assessments before and at least 6 months after surgery. Cognitive changes were mainly evaluated by the Montreal cognitive assessment (MoCA) scale (...) and the seven specific MoCA domains, including visuospatial/executive function, naming, attention, language, abstract, delayed recall, and orientation. Motor improvement was evaluated by the UPDRS-III. Cognitive changes and motor improvements were compared between PD-MCI and normal cognitive (NC) patients. Logistic regression analyses were performed to explore predictors of post-operative cognitive change.ResultsAt the time of surgery, 61.90% of the included PD patients had MCI. Compared with the PD-MCI group, the PD-NC group had a significantly higher proportion of cases with post-operative cognitive decline during follow-up of up to 36 months (mean 17.34 ± 10.61 months), mainly including in global cognitive function, visuospatial/executive function and attention. Covariate-adjusted binary logistic regression analyses showed that pre-operative global cognitive status was an independent variable for post-operative cognitive decline. We also found that pre-operative cognitive specific function could predict its own decline after STN-DBS, except for the naming and orientation domains.ConclusionPD-MCI patients are at a lower risk of cognitive decline after STN-DBS compared with PD-NC patients. (shrink)

Implicit in the value sensitive design (VSD) approach is a concern for understanding, and where possible, disrupting problematic power relationships. Yet an awareness of the issues and ethics of power relations is a pre-requisite for such a concern to bear fruit. This article provides some insight into the issues, and through a case study of technology design to support care arrangements for age-related cognitive decline, illustrates how finding a satisfactory resolution can be particularly troublesome.

As the world's population ages, governments and non-governmental organizations in developed countries are promoting healthy cognitive ageing to reduce the rate of age-related cognitive decline and sustain economic productivity in an ageing workforce. Recommendations from the Productivity Commission, Dementia Australia, Government Office for Science, Presidential Commission for the Study of Bioethical Issues, Institute of Medicine, among others, are encouraging older adults to engage in mental, physical, and social activities. These lifestyle recommendations for healthy cognitive ageing are (...) timely and well supported by scientific evidence but they make implicit normative judgments about the responsibility of ageing individuals to prevent cognitive decline. Ethical tensions arise when this individual responsibility collides with social and personal realities of ageing populations. First, we contextualize the priority given to healthy cognitive ageing within the current brain-based medical and social discourses. Second, we explore the individual responsibility by examining the economic considerations, medical evidence and individual interests that relate to the priority given to healthy cognitive ageing. Third, we identify three key ethical challenges for policymakers seeking to implement lifestyle recommendations as an effective population-level approach to healthy cognitive ageing. The result is a prospectus for future in-depth analysis of ethical tensions that arise from current policy discussions of healthy cognitive ageing. (shrink)

PurposeThis study aimed to examine the long-term association between social activity, physical function decline and cognitive function, as well as verify the long-term mediating effect of physical function decline on the relationship between social activity and cognitive function.MethodsData from the Korean Longitudinal Study of Aging that was collected over 10 years was analyzed. The sample included 10,240 adults aged 45–93 years. Multivariate latent growth modeling was applied to verify the long-term effect of social activity and physical (...) function on cognitive function.ResultsThe results revealed that social activity had a positive impact on cognitive function and negative impact on physical function decline after controlling for age and education level. Additionally, physical function decline negatively influenced cognitive function. Finally, social activity indirectly affected cognitive function through physical function decline.ConclusionThe contribution of this study was to test the long-term effect social activity on physical and cognitive function. (shrink)

Social cognition is critical for successfully navigating social relationships. Current evidence suggests that older adults exhibit poorer performance in several core social-cognitive domains compared to younger adults. Neurocognitive decline is commonly discussed as one of the key arbiters of age-related decline in social-cognitive abilities. While evidence supports this notion, age effects are likely attributable to multiple factors. This paper aims to recontextualize past evidence by focusing issues of motivation, task design, and representative samples. In light of (...) these issues, we identify directions for future research to aide our understanding of social-cognitive aging. (shrink)

This book explores the steady decline in the status of the individual in recent years and addresses common misunderstandings about the concept of individuality. Drawing from psychology, neuroscience, technology, economics, philosophy, politics, and law, White explains how and why the individual has been devalued in the eyes of scholars, government leaders, and the public. He notes that developments in science have led to doubts about our cognitive competence, while assumptions made in the humanities have led to questions about (...) our moral competence. In this book, White goes on to argue that both of these views are mistaken and that they stem from overly simplistic ideas about how individuals make choices, however imperfectly, in their interests, which are multifaceted and complex. In response, he proposes a new way to look at individuals that preserves their essential autonomy while emphasizing their responsibility to others, inspired by the moral philosophy of Immanuel Kant and the legal and political philosophy reflected in the Bill of Rights to the U.S. Constitution. This book explains how individuality combines both rights and responsibilities, reconciles the popular yet false dichotomy between individual and society, and provides the basis for a humane and respectful civil society and government. This book is part of White's trilogy on the individual and society, which includes The Manipulation of Choice and The Illusion of Well-Being. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Mild Cognitive Impairment:Where Does It Go From Here?John Bond (bio) and Lynne Corner (bio)Keywordsbiomedicalization, dementia, mild cognitive impairment, subjectivityThe joy of formal interdisciplinary discussion of this kind is the way that ideas presented through the gaze of social scientists stimulate such exciting thoughts and responses from other disciplines such as philosophy and psychology. We would like to thank Sabat and Thornton for their supportive and provocative reactions (...) to our paper. In the spirit of their responses, it is not our intention to respond to their thoughts directly; rather, we take the opportunity to theorize sociologically about this new category of psychiatry that has come to be known simply as mild cognitive impairment (MCI). In reviewing the responses of Sabat and Thornton, three thoughts emerged. First, together we have covered ontologic, epistemologic, methodologic, and theoretical questions about MCI, but none of us has posed basic political questions, such as: Why has MCI emerged as a new psychiatric label at this particular time? Second, this discussion brings together social scientists with a psychologist and a philosopher, but important constituents are missing. Consequently we are missing "insider" views on the importance of MCI to clinical practice. Third, this discussion highlights for us even more acutely the central question: Is MCI a real entity? In the following, we reflect on the first of these because our response also addresses the third. We first revisit the "evidence" about the importance of MCI for clinical practice.The notion of MCI as the transitional state between normal aging and Alzheimer's disease and other dementias has existed in a number of guises for many years, with benign senescent forgetfulness (Kral 1962) being the forerunner of a number of other terms, including questionable dementia, incipient dementia, isolated memory impairment, mild neurocognitive decline, age-associated memory impairment, age-associated cognitive decline, and cognitive-impairment-not-demented (Geda et al. 2004). Given that psychiatric labels implying the existence of MCI have been part of the practice landscape for over forty years, it is perhaps not surprising that its reinvention in the form of MCI has not, it appears, raised much attention outside specialist centers in North America and Europe. The reaction from grassroots clinical practice has been similar in intensity to their subdued reaction to the antipsychiatry movement in the 1960s. But for specialist clinics like the Mayo Clinic in Rochester, Minnesota, it has been an expanding [End Page 29] industry with numerous published papers, international conference presentations, and research funding opportunities.MCI can be distinguished from similar diagnostic categories that preceded its appearance in 1991. A key diagnostic criteria is the requirement for a subjective memory complaint by the person subsequently diagnosed as having MCI. Other diagnostic criteria include normal general cognitive function, normal activities of daily living, and memory being impaired for age, but not being demented (Petersen et al. 1999; Petersen and Morris 2003). To our knowledge, the idea of subjectivity being an important diagnostic criterion, as opposed to a means of identifying signs and symptoms, is a first in medical science. We know of no other medical category or diagnosis where subjectivity plays such a significant role, other than perhaps severe health phobias. Broadly speaking, two kinds of clinical evidence for MCI exist: first, that originating from studies (some quite small) applying the diagnostic criteria in specialist clinic populations; and, second, that found in large population studies. The main distinction between these two sets of evidence is that one is based on selected clinic populations and the other on unselected community populations. Most studies conclude that people whose memory is impaired for their age, as measured by similar cognitive tests such as the Mini-Mental State Examination, show decline in cognition that often leads to Alzheimer's disease and other kinds of dementia in the future. This finding is not remarkable given that it has long been known that age is a predictor of cognitive impairment. However, the population studies suggest a lower conversion rate than those for specialist clinics (Ritchie, Artero, and Touchon 2001).Petersen (2005) provides a robust defense as to why MCI might be a useful category in research and also indicates the potential benefits of treating MCI... (shrink)

Objective: The establishment of patient-centered measures capable of empirically determining meaningful cognitive change after surgery can significantly improve the medical care of epilepsy patients. Thus, this study aimed to develop reliable change indices (RCIs) and standardized regression-based (SRB) change norms for a comprehensive neuropsychological test battery in the German language. Methods: Forty-seven consecutive patients with temporal lobe epilepsy underwent neuropsychological assessments, both before and 12 months after surgery. Practice-effect-adjusted RCIs and SRB change norms for each test score were computed. (...) To assess their usefulness, the presented methods were applied to a clinical sample, and binary logistic regression analyses were conducted to model the odds of achieving improvement in quality of life (QOL) after surgery. Results: The determined RCIs at 90% confidence intervals, and the SRB equations for each test score included in the test battery are provided. Cohen’s kappa analyses revealed a moderate mean agreement between the two measures, varying from slight to almost perfect agreement across test scores. Using these measures, a negative association between improvement in QOL and decline in verbal memory functions after surgery was detected. Significance: To the best of our knowledge, this study is the first to provide RCIs and SRB change norms necessary for the objective determination of neuropsychological change in a comprehensive test battery in the German language, facilitating the individual monitoring of improvement and decline in each patients’ cognitive functioning and psychosocial situations after epilepsy surgery. The application of the described measures revealed a strong negative association between improvement in QOL and decline in verbal memory functions after surgery. (shrink)

BackgroundSexual minority (SM) older adults experience mental health disparities. Psychiatric disorders and neuropsychiatric symptoms (NPS) are risk factors for cognitive decline. Although older people in same-sex (SSR) compared to mixed-sex relationships (MSR) perform more poorly on cognitive screening tests, prior studies found no differences in rates of dementia diagnosis or neuropsychological profiles. We sought to explore the role of NPS on neurocognitive outcomes for SM populations. We compared cognitive performance and structural brain parameters of older adults (...) in SSR and MSR.MethodsData were originally collected at Alzheimer's Disease Research Centers (ADRCs). Inclusion criteria were: age of 55+ years, a study partner identified as a spouse/partner, and availability of T1-MRI brain volumes/thickness. Participants were labeled as either SSR or MSR based on their/their co-participant's reported sex. We identified 1,073 participants (1,037 MSR−555 cognitively unimpaired [CU]; 36 SSR−23 CU) with structural MRI data, Mini-Mental State Exam (MMSE), and Neuropsychiatric Inventory Questionnaire (NPI-Q) scores. A subset of the overall sample completed comprehensive neuropsychological assessment (n = 939; 908 MSR−494 CU; 31 SSR−22 CU). Covariates included in statistical models were age, sex, education, total intracranial volume, and apolipoprotein E genotype.ResultsMultivariate general linear models showed significant diagnosis-by-relationship interaction effects on the left parahippocampal gyrus volume. After stratification by relationship group, only cognitively impaired (CI) MSR had significantly smaller left parahippocampal volumes than MSR-CU. The SSR group showed better episodic memory performance. Severity of neuropsychiatric symptoms was negatively associated with volume/thickness of bilateral fronto-temporal areas and with MMSE scores, predominantly in the MSR group.ConclusionIn our study, MSR participants presented with a more compromised cognitive profile than SSR participants. MSR-CI participants showed significantly smaller left medio-temporal volumes, a neural signature of AD. Neuropsychiatric symptoms predicted smaller fronto-temporal volumes in the MSR more consistently than in the SSR group. These findings may be due to unexplored protective factors against cognitive decline in SM elders. Indeed, social support has been proposed as a protective factor warranting future investigation. (shrink)

The evolution of a relevant nosological concept reflects changes in the distinction between what is recognized and defined as normal and pathologic. Attention is directed to the rationale and value of detecting subclinical aging-related modifications in cognitive performance. The position that different kinds of dementias may have precedents in etiological-specific kinds of early or mild cognitive impairments (MCI) supports targeting people earlier for study of these subclinical symptoms. Because heterogeneous disorders can be expected to have multiple patterns of (...) cognitive and behavioral changes, useful conceptual nosologies should be flexible. Yet clinical research primarily restricts its focus to a single pathway where MCI leads to Alzheimer's disease (AD), and uses selective recruitment, washout screenings, repeated trialing of similar compounds, and other methods that bank the published evidence in favor of the existing therapies and their modest efficacy. This focus on AD recursively colors MCI, not as a flexible "human kind" in need of more careful research, but like AD, as an essential "natural kind." Early determination of MCI targets a potential pharmaceutical market of a quarter to a half of the population over sixty-five and the individual experiencing cognitive decline in its early stages is aware and sensitive to their surroundings, to a linked sociodegeneration with neurodegeneration. This paper examines how classifying people changes both the classifier and the subject of classification. The potential for conflict of interest is raised regarding what new causal knowledge and techniques for ascertainment are selected. Reading evidence from epidemiology, neurology, and clinical studies through science studies and bioethics lenses, we explore the possibility of a pluralistic model of cognitive impairment nosology where biological/pathologic processes respond and interrelate with a normal healthy state. (shrink)

Cognitive decline is common in Parkinson’s disease (PD), and precise cognitive assessment is important for diagnosis, prognosis, and treatment. To date, there are no studies in PD investigating cultural bias on neuropsychological tests. Clinical practice in multicultural societies such as Toronto Canada, where nearly half of the population is comprised of first generation immigrants, presents important challenges as most neuropsychological tools were developed in Anglosphere cultures (e.g., USA, UK) and normed in more homogeneous groups. We examine total (...) scores and rates of deficits on tests of visuoperceptual/visuospatial, attention, memory, and executive functions in Canadians with PD born in Anglosphere countries (n = 248) versus in Canadians with PD born in other regions (International group; n = 167). The International group shows lower scores and greater rates of deficits on all visuoperceptual and some executive function tasks, but not on attention or memory measures. These biases are not explained by demographic and clinical variables as groups were comparable. Age at immigration, years in Canada, and English proficiency also do not account for the observed biases. In contrast, group differences are strongly mediated by the Historical Index of Human Development of the participants’ country of birth, which reflects economic, health, and educational potential of a country at the time of birth. In sum, our findings demonstrate lasting biases on neuropsychological tests despite significant exposure to, and participation in, Canadian culture. These biases are most striking on visuoperceptual measures and non-verbal executive tasks which many clinicians still considered to be “culture-fair” despite the growing evidence from the field of cross-cultural neuropsychology to the contrary. Our findings also illustrate that socio-development context captures important aspects of culture that relate to cognition, and have important implications for clinical practice. (shrink)

ABSTRACTObjective: This study was designed to improve our understanding of prospective memory changes in ageing, and to identify the cognitive correlates of PM decline, using a virtual environment, to provide a more realistic assessment than traditional laboratory tasks.Design: Thirty-five young and 29 older individuals exposed to a virtual town were asked to recall three event-based intentions with a strong link between prospective and retrospective components, three event-based intentions with a weak link, and three time-based intentions. They also underwent (...) retrospective episodic memory, executive functions, binding in working memory, processing speed, and time estimation assessments.Results: Older individuals recalled fewer intentions than young adults. While age-related PM decline affected the recall of both prospective and retrospective components, the recall of the latter seemed more challenging for older individuals when the link was weak. This PM decline was linked to an age-related decline... (shrink)

Mild Cognitive Impairment (MCI) is a diagnostic category indicating cognitive impairment which does not meet diagnostic criteria for dementia such as Alzheimer’s disease. There are public health concerns about Alzheimer’s disease (AD) prompting intervention strategies to respond to predictions about the impacts of ageing populations and cognitive decline. This relationship between MCI and AD rests on three interrelated principles, namely, that a relationship exists between AD and MCI, that MCI progresses to AD, and that there is (...) a reliable system of classification of MCI. However, there are also several ethical issues and problems arising in the AD/MCI relationship. These include early diagnosis and interventions, the effects on people with MCI, and the newer neuroimaging and neuropharmacological approaches used in diagnosis and treatment. All these issues pose questions about the principles of MCI in relation to AD, with implications for how MCI is understood, diagnosed, treated, and experienced by patients. This article analyses four challenging areas for neuroethics: the definition and diagnosis of MCI; MCI in relation to AD; clinical implications of MCI for ethical disclosure, diagnosis, and treatment; and the research implications of MCI. The significant connections between these areas are often overlooked, together with uncertainties overall. Patients, healthcare systems and society are best served by informed clinicians, academics and researchers. After 35 years, the store of MCI knowledge is expanding and evolving. (shrink)

BackgroundAlthough gait patterns disturbances are known to be related to cognitive decline, there is no consensus on the possibility of predicting one from the other. It is necessary to find the optimal gait features, experimental protocols, and computational algorithms to achieve this purpose.PurposesTo assess the efficacy of the Stable Sparse Classifiers procedure for discriminating young and healthy older adults, as well as healthy and cognitively impaired elderly groups from their gait patterns. To identify the walking tasks or combinations (...) of tasks and specific spatio-temporal gait features that allow the best prediction with SSC.MethodsA sample of 125 participants was studied. They underwent assessment with five neuropsychological tests that explore different cognitive domains. A summarized cognitive index, based on the Mahalanobis distance from normative data, was calculated. The sample was divided into three groups using k-means clustering of MDCog in addition to Age. The participants executed four walking tasks and their gait patterns, measured with a body-fixed Inertial Measurement Unit, were used to calculate 16 STGF and dual-task costs. SSC was then employed to predict which group the participants belonged to. The classification's performance was assessed using the area under the receiver operating curves and the stable biomarkers were identified.ResultsThe discrimination HE vs. MCI-E revealed that the combination of the easy dual-task and the fast walking task had the best prediction performance. The features related to gait variability and to the amplitude of vertical acceleration had the largest predictive power. SSC prediction accuracy was better than the accuracies obtained with linear discriminant analysis and support vector machine classifiers.ConclusionsThe study corroborated that the changes in gait patterns can be used to discriminate between young and healthy older adults and more importantly between healthy and cognitively impaired adults. A subset of gait tasks and STGF optimal for achieving this goal with SSC were identified, with the latter method superior to other classification techniques. (shrink)

Cognition is defined as the brain’s ability to acquire, process, store, and retrieve information. Pain has been described as an unpleasant sensory or emotional experience, and for experiencing pain consciously, cognitive processing becomes imperative. Moreover, evaluation of pain strongly depends on cognition as it requires learning and recall of previous experiences. There could be a possible close link between neural systems involved in cognition and pain processing, and studies have reported an association between pain and cognitive impairment. In (...) this narrative review, we explore the available evidence that has investigated cognitive changes associated with pain. We also examine the anatomical, biochemical, and molecular association of pain and neuro-cognition. Additionally, we focus on the cognitive impairment caused by analgesic medications. There is a need to improve our understanding of pathophysiology and cognitive impairment mechanisms associated with chronic pain and its treatment. This area provides a diverse opportunity for grounding future research, aiding institution of timely interventions to prevent chronic pain and associated cognitive decline, ultimately improving patient care. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Mild Cognitive Impairment:What's in a Name?Steven R. Sabat (bio)Keywordslabeling, mild cognitive impairment, recall memory, selfhood, stereotype threatCorner and Bond (2006) raise a number of important conceptual issues related to the problems involved in defining mild cognitive impairment (MCI), differentiating it from normal aging, the definition of normal aging itself, and ethical issues surrounding the possible adverse effects of a diagnosis of MCI on the individuals thus (...) described. It would seem that portentous ramifications are involved and that clarifying the conceptual issues would be of great value, not only to researchers but also to the ever-growing population of elderly people. In what follows, I address some of these issues further.Problems of Definition and MeasurementOne of the problems that the authors discuss at the outset of their article concerns what methods are appropriate for detecting those with MCI: "Neuropsychological tests alone do not discriminate between normal aged-related memory loss and MCI or dementia and clinical judgment remains central to diagnosis" (Corner and Bond 2006, 5). Of course, to be able to discriminate between normal aged-related memory problems and MCI, we must first be able to define the former. What exactly is normal? As the authors correctly point out, the term has different meanings, one being normative (usual), another being nonpathologic. Is it normal (usual) for some sort of breakdown to occur in brain systems as a function of increased age? If so, is there a threshold age below which the very same physiologic breakdown is unusual? Would such a threshold age, if one existed, be the same for everyone, regardless of genotype and the cumulative interactive effects of nutrition, health, and stress-related factors over a period of decades? In effect, is some sort of memory impairment part of the natural (usual) process of aging for some people at particular ages rather than for others? And exactly what does it mean to be mildly impaired in the cognitive domain?Hogan and McKeith (2001) presented a working group's definition characterizing MCI such that people who complain about memory problems and who also provide objective evidence of such problems, yet who simultaneously display "normal general cognitive function and intact activities of daily living" (Hogan and McKeith 2001, 1131), should be identified and followed. Here again, however, we confront the problem of defining "normal general cognitive function" as well as "normal activities of daily living." Can one have normal general cognitive function without normal memory function? If so, what exactly constitutes [End Page 13] general cognitive function and on what conceptual or theoretical basis is such a definition valid? Furthermore, what sort of memory function are we talking about? Memory can be said to involve a number of stages: encoding, storage, and retrieval. Retrieval can be of the explicit type (conscious recall or recognition of specific information) with which people with Alzheimer's disease (AD) often reveal deficits or of the implicit type (a change in behavior as a result of previous experience of which the person may have no conscious recollection) as demonstrated in people with AD (Knopman and Nissen 1987). That is, people with AD can display deficits in explicit memory functions without similar deficits simultaneously in implicit memory functions.A partial answer to the question about memory loss in MCI may be found in the use of the Mini-Mental State Examination (MMSE; Folstein, Folstein, and McHugh 1975), originally intended to be used as a screening device, but employed more and more frequently as an outcome measure to assess cognitive decline as well as the efficacy of drug treatments. Although the examination purports to test orientation, registration, attention, calculation, recall, language (naming, repeating, reading, writing, three-stage command), and construction, a task analysis reveals that the test is not quite as "global" in the cognitive domain as it is purported to be. For example, ten of the maximum thirty points on the examination are earned for "orientation" in time and place. Yet, all of the questions in this section of the test require intact recall of the relevant information. For example, if a person is asked, "What day of the week is this?" and replies "I don't know," the... (shrink)

BackgroundResearch on prevalence of cognitive frailty phenotypes in community-dwelling older adults in different countries is important to estimate their prevalence and to determine the influence of cognitive reserve and mental health in order to prevent frailty. The aims of this study were to estimate the prevalence of reversible and potentially reversible cognitive frailty in a Portuguese sample of old adults and explore the associations between these phenotypes and demographic, comorbidity, social support, cognitive reserve and mental health (...) factors.MethodsWe assessed frailty in 250 community-dwelling older adults aged 60 years or over without dementia, neurological or psychiatric disorders. Subjective cognitive decline and Mild cognitive impairment were diagnosed according to standard criteria. The questionnaires Charlson Index, Medical Outcomes Study Social Support, Cognitive Reserve Index and General Health were used for assessing comorbidity, social support, cognitive reserve and mental health, respectively.ResultsPrevalence of R-CF was 14%, and that of PR-CF, 15.2%. Cognitive frailty profiles differed significantly in relation to education, comorbidity, mental health, and cognitive reserve, but not in age or sex. Multivariate logistic regression showed that age, sex, comorbidity, social support, mental health, and cognitive reserve together predicted R-CF and PR-CF with significant OR for mental health and cognitive reserve.DiscussionCognitive reserve and mental health are important factors predicting R-CF and PR-CF. We recommend assessing these factors for early detection of cognitive frailty and promoting psychological well-being and lifestyles that increase cognitive reserve in adults. (shrink)

The Coronavirus pandemic has significantly affected psychological wellbeing in older adults, with cases of depression, anxiety and loneliness rising in the general population. Cognitive health has also potentially been affected, as social isolation can lead to cognitive decline. Worrying about cognitive health can be damaging to psychological wellbeing and is especially relevant to explore in the context of the Coronavirus pandemic. The objective of the present study was to explore the associations between cognitive health worries (...) and wellbeing, and to investigate whether physical activity and social contact can mitigate negative effects of the pandemic on psychological wellbeing. Older adults completed an online survey which included measures of cognitive health worries, depression, anxiety, loneliness, social isolation, fatigue, impact of the Coronavirus pandemic, quality of life, subjective vitality, and physical activity. Analyses indicated that cognitive health worries, lower levels of physical activity and smaller amounts of social interaction were associated with poorer psychological and physical wellbeing. Results showed that worrying about cognitive health is associated with poorer wellbeing, and so interventions are needed to encourage positive cognitive functioning in times of social isolation. Promoting physical activity and social interaction is also beneficial, as results show that exercise and social contact are linked with improved wellbeing. (shrink)

Does perceptual consciousness require cognitive access? Ned Block argues that it does not. Central to his case are visual memory experiments that employ post-stimulus cueing—in particular, Sperling's classic partial report studies, change-detection work by Lamme and colleagues, and a recent paper by Bronfman and colleagues that exploits our perception of ‘gist’ properties. We argue contra Block that these experiments do not support his claim. Our reinterpretations differ from previous critics' in challenging as well a longstanding and common view of (...) visual memory as involving declining capacity across a series of stores. We conclude by discussing the relation of probabilistic perceptual representations and phenomenal consciousness. (shrink)

Rapid individual cognitive phenotyping holds the potential to revolutionize domains as wide‐ranging as personalized learning, employment practices, and precision psychiatry. Going beyond limitations imposed by traditional lab‐based experiments, new efforts have been underway toward greater ecological validity and participant diversity to capture the full range of individual differences in cognitive abilities and behaviors across the general population. Building on this, we developed Skill Lab, a novel game‐based tool that simultaneously assesses a broad suite of cognitive abilities while (...) providing an engaging narrative. Skill Lab consists of six mini‐games as well as 14 established cognitive ability tasks. Using a popular citizen science platform (N = 10,725), we conducted a comprehensive validation in the wild of a game‐based cognitive assessment suite. Based on the game and validation task data, we constructed reliable models to simultaneously predict eight cognitive abilities based on the users’ in‐game behavior. Follow‐up validation tests revealed that the models can discriminate nuances contained within each separate cognitive ability as well as capture a shared main factor of generalized cognitive ability. Our game‐based measures are five times faster to complete than the equivalent task‐based measures and replicate previous findings on the decline of certain cognitive abilities with age in our large cross‐sectional population sample (N = 6369). Taken together, our results demonstrate the feasibility of rapid in‐the‐wild systematic assessment of cognitive abilities as a promising first step toward population‐scale benchmarking and individualized mental health diagnostics. (shrink)

This paper explores the changes in cognitive function which occur as someone "loses consciousness" under anesthesia. Seven volunteers attempted a categorization task and a within-list recognition test while inhaling air, 0.2% isoflurane, and 0.4% isoflurane. In general, performance on these tests declined as the dose of anesthetic was increased and returned to baseline after 10 min of breathing air. A measure of auditory evoked responding termed "coherent frequency" showed parallel changes. At 0.2% isoflurane, subjects could still identify and respond (...) to category exemplars but showed impaired short-term memory function. Electrical stimulation at 0.4% isoflurane, intended to mimic the arousing effects of surgery, had a small, beneficial effect on performance. A mean of 63% of category exemplars was identified at this stage, but recognition memory for those exemplars was at chance on recovery. There was no evidence for learning of words presented at 0.8% isoflurane. (shrink)

Cognitive and Social Neuroscience of Aging is an introduction to how aging affects the brain, intended for audiences with some knowledge of psychology, aging, or neuroscience. The book includes figures illustrating brain regions so that extensive familiarity with neuroanatomy is not a pre-requisite. The depth of coverage also makes this book appropriate for those with considerable knowledge about aging. This book adopts an integrative perspective, including topics such as memory, cognition, cognitive training, emotion, and social processes. Topics include (...) consideration of individual differences and the impact of disorders on brain function with age. Although many declines occur with age, cognitive neuroscience research reveals plasticity and adaptation in the brain as a function of normal aging. This book is written with this perspective in mind, emphasizing the ways in which neuroscience methods have enriched and changed thinking about aging. (shrink)

In _The End of the Cognitive Empire_ Boaventura de Sousa Santos further develops his concept of the "epistemologies of the south," in which he outlines a theoretical, methodological, and pedagogical framework for challenging the dominance of Eurocentric thought. As a collection of knowledges born of and anchored in the experiences of marginalized peoples who actively resist capitalism, colonialism, and patriarchy, epistemologies of the south represent those forms of knowledge that are generally discredited, erased, and ignored by dominant cultures of (...) the global North. Noting the declining efficacy of established social and political solutions to combat inequality and discrimination, Santos suggests that global justice can only come about through an epistemological shift that guarantees cognitive justice. Such a shift would create new alternative strategies for political mobilization and activism and give oppressed social groups the means through which to represent the world as their own in their own terms. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:The Ambiguities of Mild Cognitive ImpairmentTim Thornton (bio)Keywordsclassification, disease, mild cognitive impairment, normative, valuesCorner and Bond's paper (2006) raises some key ethical questions about the classification and diagnosis of mild cognitive impairment (MCI). In this commentary, I wish to revise some of the general issues about the classification of mental disorder raised by this particular classificatory concept. The central issue raised is the connection between the (...) pathologic status of a condition and what I term the plain facts about the frequency and nature of its symptoms.There are a number of ethical questions raised by applying the label of MCI. Centrally, perhaps, is the concern, illustrated by the case vignettes, that a diagnosis carries negative repercussions that might outweigh the more narrowly medical advantages of an early diagnosis. But although that concern may be appropriate, such ethical complications are a danger of any psychiatric classification or diagnosis, even the most well grounded. Any psychiatric diagnosis can carry a danger of stigma, for example.What seems to make such ethical concerns more serious in this case—at least to a philosopher outsider—is the implicit further concern that MCI is not a real, objective, or, to use a more medical term, valid category or classification. If it is not valid, then any negative connotations of the diagnosis will not be outweighed by medical technological achievements. In other words, the further ethical issues are given much greater weight if the question of validity is not satisfactorily resolved.The question of the reality, objectivity, or validity of MCI can be divided into two issues:1. Is MCI a real, objective, or valid feature of psychological phenomenology?2. Is MCI a real, objective, or valid psychological illness, disease, or pathology?A condition might be a real, objective, or valid feature of psychological phenomenology without being a real illness. It might be some other aspect of human living. Szasz (1960) suggests that this is the case with mental illness (he might more properly say "so-called mental illness") as a whole. But, less controversially, the unusual ability to calculate, mentally and in a flash, the date of future Easter Sundays is a genuine feature of human living—some people possess the ability even if most do not—without either it, or its lack, being an illness. Being real as an illness is a very specific kind of being. It is this, I suggest, that raises difficulties in the case of MCI by contrast with the easier question of whether something is a genuine feature of human living in some other way. [End Page 21]From "normal" and "normative" to "correct" and "incorrect"Corner and Bond (2006) usefully suggest that the question of whether MCI is real is made more difficult by an ambiguity in the sense of the word normal. They suggest that although "physiologic and cognitive decline is assumed to be a normal experience" this still leaves "boundary problems" about "distinguishing normal aging from disease" (Corner and Bond 2006, 3–4). Thus, if the symptoms of MCI are continuous with the ordinary phenomena of physiologic and cognitive decline, then they might also be merely normal. But this does not settle the status of MCI because normal can mean either "normative, that is, usual; or it can mean nonpathologic" (Corner and Bond 2006, 4).On the assumption that MCI is at least continuous with phenomena that are normal, then its symptoms might be normal in the sense of usual but nevertheless pathologic: an inevitable illness. Or they might be usual and nonpathologic, that is, merely a feature of aging that, although regrettable, lacks the connotations of illness (e.g., the appropriateness, if not the possibility, of treatment). (In principle on the assumption in play—that the symptoms of MCI are normal—they might be unusual but nonpathologic akin, for example, to an improved ability to solve crosswords with age that might affect a small lucky proportion of the population. Perhaps such a crossword puzzler might be reassured by their doctor: "Well that is very unusual but there is no need to worry: it is not a symptom of any illness. You are perfectly normal.")Thus the question "Is MCI normal... (shrink)

Emotional information captures attention due to privileged processing. Consequently, performance in cognitive tasks declines. Therefore, shielding current goals fro...

Advocates of cognitive enhancement maintain that technological advances would augment autonomy indirectly by expanding the range of options available to individuals, while, in a recent article in this journal, Schaefer, Kahane, and Savulescu propose that cognitive enhancement would improve it more directly. Here, autonomy, construed in broad procedural terms, is at the fore. In contrast, when lauding the goodness of enhancement expressly, supporters’ line of argument is utilitarian, of an ideal variety. An inherent conflict results, for, within their (...) utilitarian frame, the content of rational, hence autonomous, choices is quite restricted. Further, advocates do not clearly indicate their relative emphasis between the often conflicting goals of maximizing benefit and avoiding harm. In practice, their construction of harms is highly expansive, for disabilities include any constraints that “rational” people would decline if it were technically possible to do so. For advocates, this means that where enhancement measures are available, those constraints become avoidable limitations, and not to remove them is to harm. The centrality of harm-avoidance and their ideal utilitarian frame entail sociopolitical requirements that enhancement defenders disallow when trumpeting autonomy in the vein of individual choice. Advocates have thus not done enough to support the claim that their views are wholly separate from earlier eugenics. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Reifying Relevance in Mild Cognitive Impairment:An Appeal for Care and CautionJanice E. Graham (bio) and Karen Ritchie (bio)KeywordsAlzheimer’s disease, construction, dementia, market forces, mild cognitive impairmentWe thank the reviewers for their thoughtful comments that probe shadowy areas in our argument, and we welcome this opportunity to elucidate our position. First, we are not repudiating the natural and social facts of pathologic brain degeneration and the physical and (...) cognitive impairments that manifest in people affected by dementia disorders. We are, however, questioning the epistemology, politics, and persistence by some to harden the construct of mild cognitive impairment (MCI) prematurely as a "natural" precursor to dementia. We suggested insufficiencies in viewing MCI as prodromal to Alzheimer's disease (AD; Graham and Ritchie 2006, 36), and pointed to evidence for the prognostic irrelevance of some MCI subcategories (35). The commentators have read our manuscript as suggesting that AD and MCI are different kinds, and that a diagnosis of AD is more "real" than that of MCI. But AD is also fraught with classification issues, as we describe in the section of our paper that deals with consensus committees, published practice guidelines, and the determination of treatment efficacy. Like MCI, AD is a heterogeneous condition, but unlike MCI, AD is a constructed practical kind that does some "work" beyond essentialist (neural degeneration, brain atrophy) claims. Its criteria identify people with well-defined dementia symptoms and multiple cognitive and functional impairments who are in need of, and benefit from, support. Even with these criteria, however, there have been great attempts to achieve definitional accuracy in dementia diagnoses. Practical refinements to the differential diagnosis of dementia based on solid research evidence have made way for more specific recognitions of vascular dementias, dementia of the Lewy body type, and other subtypes beyond AD. So AD too has been subject to more careful, more cautious operationalization in recent years, with research supporting multiple factors and the comorbidity of several types (kinds) of dementia in any one individual.Our paper takes up concerns that are not resolved for dementia and suggests that the nascent category of MCI is still so insufficiently defined as to be ambiguous, and as such, is in danger of identifying individuals with what will be, and has [End Page 57] already been, linked to a debilitating and deeply stigmatizing and fatal disorder (AD). We are not contesting the reality that some people begin to display early signs of cognitive loss, nor are we suggesting that symptoms be ignored; as researchers, we stand behind the careful tracking of symptoms and signs in patients and research participants as an essential clinical and research practice. In a era where the public has been made wary of the potentially fatal effects of new treatments whose more careful scrutiny in specific populations would have saved lives (e.g., Fontanarosa, Rennie, and DeAngelis 2004; Psaty and Furberg 2005), and made all the more popular by what Kramer coined "diagnostic bracket creep" (1993, 15), we are questioning the drivers and value of a premature diagnostic classification whose definitional accuracy is neither sufficient nor effective for specific identification of individuals.That matters of fact are constructed does not take away from their natural fact. Some people have subjective reports or show objective evidence of cognitive decline while having preserved activities of daily living—the construction of this evidence indicates they are not normal and they are not demented. Based on such evidence, where then does the balance of probability for MCI lie? A multidisciplinary international group of experts gathered in Stockholm in 2003 to discuss MCI concepts (Winblad et al. 2004). They acknowledged that the heterogeneous etiology of MCI contributes to "some confusion concerning the specific boundaries of the condition", stating that this "not normal, not demented" condition is nonetheless "useful both clinically and as a research entity" (p. 241). Importantly, they concluded that MCI needs "better definition" (p. 246). It was at this stage that we first wrote our manuscript, and in the subsequent two years we have eagerly awaited new studies, and the recognition of flexible, practical subtypes to evolve.We state "that MCI cannot be considered to be a separate clinical entity" (Graham and... (shrink)

BackgroundCognitive frailty includes reversible and potentially reversible subtypes; the former is known as concurrent physical frailty and pre-mild cognitive impairment subjective cognitive decline, whereas the latter is known as concurrent PF and MCI. The diagnoses of pre-MCI SCD and MCI are based on clinical criteria and various subjective cognitive decline questionnaires. Heterogeneous assessment of cognitive impairment results in significant variability of CI, CF, and their subtype prevalence in various population-based studies.ObjectiveThis study aimed to compare (...) the classification differences in CI and CF subtypes from PF and normal cognition by applying clinical and objective cognitive criteria. Clinical criteria comprised Fried PF and clinical MCI criteria combined with the SCD questionnaire, whereas objective criteria comprised Fried PF and objective cognitive criteria based on the norm-adjusted six neuropsychological test scores.MethodsOf the 335 volunteers in this study, 191 were diagnosed with CI based on clinical cognitive diagnosis criteria, and 144 were identified as robust normal based on objective cognitive assessment from the community-dwelling older adult cohort. Individuals with clinical CI, including 94 with MCI and 97 with pre-MCI SCD, were reclassified into different z-score-derived MCI, pre-MCI SCD, and normal subgroups based on objective cognitive criteria. The classification diagnostic accuracy of normal cognition, PF, pre-MCI, MCI, CF, and CF subtypes based on clinical and objective criteria was compared before and after adjusting for age, sex, and education level.ResultsThe reclassification of objective assessments indicated better performance than that of clinical assessments in terms of discerning CI severity among different subgroups before adjusting for demographic factors. After covariate adjustment, clinical assessments significantly improved the ability to cognitively discriminate normal individuals from those with pre-MCI SCD and MCI but not the z-score-derived pre-MCI SCD and MCI groups from the robust normal group. Furthermore, the adjustment did not improve the ability to discriminate among individuals with reversible CF from those with potentially reversible CF and pre-MCI only SCD from MCI only SCD.ConclusionsObjective criteria showed better performance than clinical criteria in the diagnosis of individuals with CI or CF subtypes. Rapid clinical cognitive screening in combination with normative z-scores criteria is cost effective and sustainable in clinical practice. (shrink)

ObjectivesThis study examined the association between childhood adversity and cognitive impairment in later life and explored the potential moderation effect of gender and race.MethodsThe study sample included 15,133 participants of the Health and Retirement Study who had complete data on key study measures and were more than 50. The outcome variable is a dichotomous indicator of cognitive impairment as assessed by the Telephone Interview for Cognitive Status for self-respondents and the 16-item Informant Questionnaire on Cognitive (...) class='Hi'>Decline in the Elderly for proxies. A total of six childhood adversity indicators included grade retention, parental substance abuse, physical abuse, trouble with the police, moving due to financial hardship, and receipt of help due to financial hardship in early life. The estimation of the association between childhood adversity and cognitive impairment involved Cox proportional hazards regression. Results: Grade retention had the largest effect on incident cognitive impairment, followed by physical abuse by a parent. The impact of grade retention was more detrimental to women than men. Parental substance abuse was associated with a lower risk of incident cognitive impairment for most racial groups, but this association was reversed in “non-Hispanic other” race, consisting mainly of Asians.DiscussionSome aspects of childhood adversity continue to harm cognitive functioning in later life, while some events may have the opposite effect, with evidence of heterogeneity across gender and race. (shrink)