Generalized anxiety disorder is among the world’s most prevalent psychiatric disorders and often manifests as persistent and difficult to control apprehension. Despite its prevalence, there is no integrative, formal model of how anxiety and anxiety disorders arise. Here, we offer a perspective derived from the free energy principle; one that shares similarities with established constructs such as learned helplessness. Our account is simple: anxiety can be formalized as learned uncertainty. A biological system, having had persistent uncertainty in its past, will (...) expect uncertainty in its future, irrespective of whether uncertainty truly persists. Despite our account’s intuitive simplicity—which can be illustrated with the mere flip of a coin—it is grounded within the free energy principle and hence situates the formation of anxiety within a broader explanatory framework of biological self-organization and self-evidencing. We conclude that, through conceptualizing anxiety within a framework of working generative models, our perspective might afford novel approaches in the clinical treatment of anxiety and its key symptoms. (shrink)

Carotenoids play pivotal roles in vision as light filters and precursor of chromophore. Many vertebrates also display the colorful pigments as ornaments in bare skin parts and feathers. Proteins involved in the transport and metabolism of these lipids have been identified including class B scavenger receptors and carotenoid cleavage dioxygenases. Recent research implicates members of the Aster protein family, also known as GRAM domain‐containing (GRAMD), in carotenoid metabolism. These multi‐domain proteins facilitate the intracellular movement of carotenoids from their site of (...) cellular uptake by scavenger receptors to the site of their metabolic processing by carotenoid cleavage dioxygenases. We provide a model how the coordinated interplay of these proteins and their differential expression establishes carotenoid distribution patterns and function in tissues, with particular emphasis on the human retina. (shrink)

This paper discusses three cultural narratives that threaten the health of people with intellectual/developmental disabilities (IDD) and which have become more evident during the COVID-19 pandemic. These meta-narratives are the medical model of health/disability; the population health approach to health inequalities; and policies premised on the assumption of the importance of national economic growth as an incentive for reducing health inequalities. Evidence exists that health research is more likely to become policy if it fits within a medical model and addresses (...) national economic growth. These two criteria are particularly problematic for people who have IDD. The paper also proposes a research model to facilitate the inclusion of IDD related issues in future policy regarding health inequalities. (shrink)

Given the diverse conceptualisations used in the measurement of organisational value congruence (OVC), the purpose of this paper is to propose an integrated typology of measurement criteria — as a methodological and measurement guideline — that can be employed in operationalising the measurement of OVC. Based on a review of over forty empirical articles, this typology proposes a path forward to operationalise the measurement of OVC by selecting from the proposed criteria and alternative dimensions to match the specific aims of (...) researchers more comprehensively. The typology thus proposed identifies six key criteria and 12 dimensions therein. It further presents how different combinations of alternative dimensions in measuring OVC are used and can be used to best suit different objectives of researchers. As a concept matrix, this typology would specifically be useful for future researchers to identify how best to measure OVC to match their specific study objectives and facilitate rational comparison of OVC studies, permitting sensible knowledge sharing. Further, this typology can be extended to locate the best possible combinations for operationalising the measurement of OVC for future research. (shrink)

Eyewitnesses to crimes sometimes search for a culprit on social media before viewing a police lineup, but it is not known whether this affects subsequent lineup identification accuracy. The present online study was conducted to address this. Two hundred and eighty-five participants viewed a mock crime video, and after a 15–20 min delay either viewed a mock social media site including the culprit, viewed a mock social media site including a lookalike, or completed a filler task. A week later, participants (...) made an identification from a photo lineup. It was predicted that searching for a culprit on social media containing the lookalike would reduce lineup identification accuracy. There was a significant association between social media exposure and lineup accuracy for the Target Present lineup, but for the Target Absent lineup there was no significant association with lineup identification accuracy. The results suggest that if an eyewitness sees a lookalike when conducting a self-directed search on social media, they are less likely to subsequently identify the culprit in the formal ID procedure. (shrink)