First published in 1993. Routledge is an imprint of Taylor & Francis, an informa company.

BackgroundKinarm Standard Tests is a suite of upper limb tasks to assess sensory, motor, and cognitive functions, which produces granular performance data that reflect spatial and temporal aspects of behavior. We have previously used principal component analysis to reduce the dimensionality of multivariate data using the Kinarm End-Point Lab. Here, we performed PCA using data from the Kinarm Exoskeleton Lab, and determined agreement of PCA results across EP and EXO platforms in healthy participants. We additionally examined whether further dimensionality reduction (...) was possible by using PCA across behavioral tasks.MethodsHealthy participants were assessed using the Kinarm EXO and EP. Four behavioral tasks were performed that quantified arm sensory and motor function, including position sense [Arm Position Matching ] and three motor tasks [Visually Guided Reaching, Object Hit, and Object Hit and Avoid ]. The number of components to include per task was determined from scree plots and parallel analysis, and rotation type was decided on a per-task basis. To assess agreement, we compared principal components across platforms using distance correlation. We additionally considered inter-task interactions in EXO data by performing PCA across all six behavioral assessments.ResultsBy applying PCA on a per task basis to data collected using the EXO, the number of behavioral parameters were substantially reduced by 58–75% while accounting for 76–87% of the variance. These results compared well to the EP analysis, and we found good-to-excellent agreement values between PCs from the EXO and those from the EP. Finally, we were able to reduce the dimensionality of the EXO data across tasks down to 16 components out of a total of 76 behavioral parameters, which represents a reduction of 79% while accounting for 73% of the total variance.ConclusionPCA of Kinarm robotic assessment appears to capture similar relationships between kinematic features in healthy individuals and is agnostic to the robotic platform used for collection. Further work is needed to investigate the use of PCA-based data reduction for the characterization of neurological deficits in clinical populations. (shrink)

Arguing that the universe is absolutely directioned and that there exist spatial (directional) relations that Leibniz overlooked, H. Scott Hestevold formulates a new relationalist theory of space, exploring its implications for the Special Composition Question, reductivism regarding boundaries and holes, and the nature of spacetime.

There has been much recent debate about Presentism among those who believe the doctrine to be nontrivial and true, those who believe it to be nontrivial and false, and those who believe it to be trivial — either trivially true or trivially false. Formulating Presentism precisely is problematic, which accounts for some of the controversy.

Abstract: Presentism is the view that whatever exists presently exists. Without defending Presentism, I argue first that Presentists should be Time-Free Presentists – Presentists whose views do not imply that there exist irreducible times. Second, I argue that Presentists should accept Limited Thick Presentism, the view that 'the present' has some extension and is thereby neither durationlessly thin nor unlimitedly 'thick'. Third, before addressing several objections to Limited Time-Free Thick Presentism [LTFTP], I argue that defenders of LTFTP should accept that (...) 'temporal becoming' involves an overlapping succession of present entities, not a 'skipping' from one set of present entities to the next discrete set. (shrink)

When is it that two objects compose a whole? Or, put another way, if Z is an object composed of X and Y, then what must be done to bring it about that X and Y both exist and Z does not exist? The author defends an answer to what is now know as the Special Composition Question.

We note in Section I that an acceptable formulation of Presentism must preserve its consistency with Transient Time and inconsistency with Static Time. After arguing in Section II that certain formulations of Presentism are unacceptable, we offer in Section III a formulation of Presentism that we defend against the charge of triviality.

There have emerged two distinct approaches to preserving the coherence of theism. The most common approach involves explicating the concept of an absolutely perfect God in terms of the divine attributes and then analyzing the divine-attribute concepts in such a way that they are rendered mutually consistent. According to this ‘multiple-attribute’ approach, the coherence of theism ultimately turns both on whether each divine-attribute concept can be coherently analyzed independently of the other divine-attribute concepts and on whether the divine attributes are (...) then mutually consistent. (shrink)

Written in debate format, this book covers developing fields such as social cognition, as well as classic areas such as memory, learning, perception and categorization. The links between emotion and memory, learning, perception, categorization, social judgements, and behavior are addressed.

Is consolidation needed to account for retroactive interference in free recall? Interfering mental activity during the retention interval of a memory task impairs performance, in particular if the interference occurs in temporal proximity to the encoding of the to-be-remembered information. There are at least two rival theoretical accounts of this temporal gradient of retroactive interference. The cognitive neuroscience literature has suggested neural consolidation is a pivotal factor determining item recall. According to this account, interfering activity interrupts consolidation processes that would (...) otherwise stabilize the memory representations of TBR items post-encoding. Temporal distinctiveness theory, by contrast, proposes that the retrievability of items depends on their isolation in psychological time. According to this theory, information processed after the encoding of TBR material will reduce the temporal distinctiveness of the TBR information. To test between these accounts, implementations of consolidation were added to the SIMPLE model of memory and learning. We report data from two experiments utilizing a two-list free recall paradigm. Modeling results imply that SIMPLE was able to model the data and did not benefit from the addition of consolidation. It is concluded that the temporal gradient of retroactive interference cannot be taken as evidence for memory consolidation. (shrink)

“States have no morality, they have interests,” remarked an overzealous diplomat. And in this same manner we sometimes see that reasons of state take priority over moral rules. A sweet young thing testifying before a committee of the United State Congress said “sometimes you have to put yourself above the law,” no doubt repeating something that had been said to her. At a time when unrestrained application of the reasons of state can only lead to violence that can no longer (...) be sustained, we can judge to what extent such remarks are without foundation. (shrink)

Roderick M. Chisholm’s A Realistic Theory of Categories is a metaphysics treatise of extraordinary breadth and precision. Published in the year of its author’s eightieth birthday, Categories is a lean exposition of Chisholm’s systematic metaphysics, including his views on attributes, propositions, possible worlds, numbers, classes, relations, intentionality, events, time, space, material objects, persons, appearances, fictitious objects, and God. Chisholm develops his metaphysics with the resourcefulness, elegance, and intellectual integrity that have been a hallmark of his work.

Florijn’s helpful discussion of the Heringa case illustrates the difficulties in drawing a boundary on eligibility conditions for EAS. In Heringa, the Dutch Supreme Court reaffirmed...

Should the assessment of decision‐making capacity (DMC) be risk sensitive, that is, should the threshold for DMC vary with risk? The debate over this question is now nearly five decades old. To many, the idea that DMC assessments should be risk sensitive is intuitive and commonsense. To others, the idea is paternalistic or incoherent, or both; they argue that the riskiness of a given decision should increase the epistemic scrutiny in the evaluation of DMC, not increase the threshold for DMC. (...) We respond to the critics’ main concerns by providing a comprehensive account of how risk‐sensitive DMC is coherent, avoids paternalism, and best fulfills the epistemic goal of DMC evaluations. (shrink)

By the time this essay is published, it will be a matter of weeks before doctors and nurse practitioners in Canada can legally end the lives (by medical assistance in dying, or MAID) of non-dying p...

Antibiotic development and usage, and antibiotic resistance in particular, are today considered global concerns, simultaneously mandating local and global perspectives and actions. Yet such global considerations have not always been part of antibiotic policy formation, and those who attempt to formulate a globally coordinated response to antibiotic resistance will need to confront a history of heterogeneous, often uncoordinated, and at times conflicting reform efforts, whose legacies remain apparent today. Historical analysis permits us to highlight such entrenched trends and processes, helping (...) to frame contemporary efforts to improve access, conservation and innovation. (shrink)

Shavelson et al. (2023) raise the familiar question of parity or fairness in the assisted dying1 debate: if we legally permit the practice for one person, should we not permit everyone similarly si...

Scott Gordon provides a magisterial review of the historical development of the social sciences from their beginnings in renaissance Italy to the present day.

Most jurisdictions require that a mental capacity assessment be conducted using a functional model whose definition includes several abilities. In England and Wales and in increasing number of countries, the law requires a person be able to understand, to retain, to use or weigh relevant information and to communicate one’s decision. But interpreting and applying broad and vague criteria, such as the ability ‘to use or weigh’ to a diverse range of presentations is challenging. By examining actual court judgements of (...) capacity, we previously developed a descriptive typology of justifications used in the application of the Mental Capacity Act criteria. We here critically optimise this typology by showing how clear definitions—and thus boundaries—between the criteria can be achieved if the ‘understanding’ criterion is used narrowly and the multiple rationales that fall under the ability to ‘use or weigh’ are specifically enumerated in practice. Such a typology-aided practice, in theory, could make functional capacity assessments more transparent, accountable, reliable and valid. It may also help to create targeted supports for decision making by the vulnerable. We also discuss how the typology could evolve legally and scientifically, and how it lays the groundwork for clinical research on the abilities enumerated by the MCA. No data are available. This paper does not report any original data. (shrink)