Fifty-odd years of inter-group contact: from hypothesis to integrated theory

We review 50-odd years of research on Allport's (1954)'contact hypothesis', to assess progress, problems, and prospects. We chart the progress that has been made in understanding two distinct forms of contact: direct and indirect. We highlight the progress made in understanding the effects of each type of contact, as well as both moderating and mediating factors, and emphasize the multiple impacts of direct contact, especially. We then consider some of the main critiques of inter-group contact, focusing on empirical issues and whether contact impedes social change, and provide a research agenda for the coming years. We conclude that this body of work no longer merits the modest title of 'hypothesis', but fully deserves acknowledgement as an integrated and influential theory.     

Legal and Ethical Implications of Refusing to Counsel Homosexual Clients

In 2001, a federal appeals court upheld the job termination of a counselor who requested being excused from counseling a lesbian client on relationship issues because homosexuality conflicted with the counselor's religious beliefs (Bruff v. North Mississippi Health Services, Inc., 2001). This article provides the facts of the case and the legal reasoning of the court. The authors also explore the legal and ethical issues related to this case.     

The dynamics of moral progress

Assuming that there is moral progress, and assuming that the abolition of slavery is an example of it, how does moral progress occur? Is it mainly driven by specific individuals who have gained new moral insights, or by changes in the socio‐economic and epistemic conditions in which agents morally judge the norms and practices of their society, and act upon these judgements? In this paper, I argue that moral progress is a complex process in which changes at the level of belief and changes at the level of institutions and social practices are deeply intertwined, and that changes in the socio‐economic and epistemic conditions of moral agency constitute the main motor of moral progress. I develop my view of moral progress by way of grappling with Michelle Moody‐Adams’ prominent philosophical account of it. My view is less intellectualistic and individualistic than hers, does not presuppose meta‐ethical moral realism, and blurs her distinction between moral progress in beliefs and moral progress in social practices. I point out the limits of humans to progress morally, which are partly grounded in our evolutionary history, and argue that moral progress is always of a ‘local’ nature.     

Current directions in visual working memory research: An introduction and emerging insights

Visual working memory (VWM) is a core construct in the cognitive (neuro‐)sciences, assumed to serve as a hub for information exchange and thus supporting a multitude of cognitive functions related to processing visual information. Here, we give an introduction into key terms and paradigms and an overview of ongoing debates in the field, to which the articles collected in this Special Issue on ‘Current Directions in Visual Working Memory Research’ contribute. Our aim is to extract, from this overview, some ‘emerging’ theoretical insights concerning questions such as the optimal way to examine VWM, which types of mental representations contribute to performance on VWM tasks, and how VWM keeps features from the same object together and apart from features of concurrently maintained objects (the binding problem).     

Two good reasons to say ‘change!’ – ensemble representations as well as item representations impact standard measures of VWM capacity

Visual working memory (VWM) is a central bottleneck in human information processing. Its capacity is most often measured in terms of how many individual‐item representations VWM can hold (k). In the standard task employed to estimate k, an array of highly discriminable colour patches is maintained and, after a short retention interval, compared to a test display (change detection). Recent research has shown that with more complex, structured displays, change‐detection performance is, in addition to individual‐item representations, supported by ensemble representations formed as a result of spatial subgroupings. Here, by asking participants to additionally localize the change, we reveal indication for an influence of ensemble representations even in the very simple, unstructured displays of the colour‐patch change‐detection task. Critically, pure‐item models from which standard formulae of k are derived do not consider ensemble representations and, therefore, potentially overestimate k. To gauge this overestimation, we develop an item‐plus‐ensemble model of change detection and change localization. Estimates of k from this new model are about 1 item (~30%) lower than the estimates from traditional pure‐item models, even if derived from the same data sets.     

Simplified Tableaux for STIT Imagination Logic

Journal of Philosophical Logic - We show how to correct the analytic tableaux system from the paper Olkhovikov and Wansing (Journal of Philosophical Logic, 47(2), 259–279, 2018).     

A Rule-Extension of the Non-Associative Lambek Calculus

An extension L ⁺ of the non-associative Lambek calculus Lis defined. In L ⁺ the restriction to formula-conclusion sequents is given up, and additional left introduction rules for the directional implications are introduced. The system L ⁺ is sound and complete with respect to a modification of the ternary frame semantics for L.     

A chimeric point-light walker

Ambiguity has long been used as a probe into visual processing. Here, we describe a new dynamic ambiguous figure-the chimeric point-light walker--which we hope will prove to be a useful tool for exploring biological motion. We begin by describing the construction of the stimulus and discussing the compelling finding that, when presented in a mask, observers consistently fail to notice anything odd about the walker, reporting instead that they are watching an unambiguous figure moving either to the left or right. Some observers report that the initial percept fluctuates, moving first to the left, then to the right, or vice versa; others always perceive a constant direction. All observers, when briefly shown the unmasked ambiguous figure, have no difficulty in perceiving the novel motion pattern once the mask is returned. These two findings--the initial report of unambiguous motion and the subsequent 'primed' perception of the ambiguity--are both consistent with an important role for top-down processing in biological motion. We conclude by suggesting several domains within the realm of biological-motion processing where this simple stimulus may prove to be useful.