Closer

Criteria of identity should mirror the identity relation in being reflexive, symmetrical, and transitive. However, this logical requirement is only rarely met by the criteria that we are most inclined to propose as candidates. The present paper addresses the question how such obvious candidates are best approximated by means of relations that have all of the aforementioned features, i.e., which are equivalence relations. This question divides into two more basic questions. First, what is to be considered a ‘best’ approximation. And second, how can these best approximations be found? In answering these questions, we both rely on and constructively criticize ground-breaking work done by Timothy Williamson. Guiding ideas of our approach are that we allow approximations by means of overlapping equivalence-relations, and that closeness of approximation is measured in terms of the number of mistakes made by the approximation when compared to the obvious candidate criterion.     

The influence of interdependent self-construal on procedural fairness effects

Various theories have been shown to account for the effects of procedural fairness on people’s attitudes and behaviors. We propose that a logical next step for organizational justice researchers is to delineate not whether, but rather when certain explanations are likely to account for people’s reactions to procedural fairness information. Accordingly, the present research tested the hypothesis that social psychological explanations would be particularly applicable to people high in interdependent self-construal. As predicted, the results of three studies showed that interdependent self-construal (ISC) moderated the relationship between procedural fairness and a variety of dependent variables (cooperation, positive affect, and desire for future interaction with the other party). In different types of interpersonal encounters (social dilemmas, reward allocations, and negotiations), procedural fairness had more of an influence on participants’ reactions among those high rather than low in ISC. Theoretical implications are discussed.     

Cost-effective use of Rational Emotive Behavior Therapy in a public mental health service

With the advanced deinstitutionalization of the treatment of the mentally ill, the public mental health services in many parts of Australia are facing serious difficulties in providing adequate community-based treatment to the large numbers of individuals in need. Overreliance on medication and a diminishing supply of suitably trained therapists may result in an increasing proportion of patients being denied the benefit of optimal treatment and care which should include evidence-based psychological and behavioral approaches. In this communication we describe a day program, designed and implemented in Perth, Western Australia, which combines individual and group therapy provision, and is closely integrated with both primary care and the specialist mental health services. The program provides an alternative to in-patient admission and is cost-effective by reducing the demand for acute hospital beds. It is acceptable to patients and produces measurable improvements in symptoms, functioning and subjective well-being. Address correspondence to Anthony Mander, ENHANCE, Inner City Mental Health Service, Royal Perth Hospital, Box X2213, Perth 6000, Western Australia.     

Using the Implicit Association Test does not rule out an impact of conscious propositional knowledge on evaluative conditioning

Implicit measures such as the Implicit Association Test (IAT) have recently become popular as tools in research on evaluative conditioning. The reason is that these measures are thought to be impervious to changes in valence that are due to conscious propositional knowledge about the relation between the conditioned stimulus (CS) and the unconditioned stimulus (US). I present data that raise doubts about the validity of this assumption. In two experiments, attitudes towards CSs as measured by the IAT were in line with instructed CS-US contingencies even though the CSs and USs were never actually paired. The results therefore suggest that IAT effects can be biassed by conscious propositional knowledge.     

To Believe in Belief

Summary  Take the following version of scientific realism: we have good reason to believe that (some of the) current scientific theories tell us something specific about the underlying, i.e. unobservable, structures of the world, for instance that there are electrons with a certain electric charge, or that there are viruses that cause certain diseases. Popper, the rationalist, would not have adhered to the proposed formulation of scientific realism in terms of the rationality of existential beliefs concerning unobservables. Popper did not believe in belief. According to Van Fraassen, the empiricist, one may yet have a rational existential belief concerning unobservables, given a liberal notion of rationality of belief. In this paper I will investigate to what extent a reassessment of both Popper’s rejection of the rationality of belief and Van Fraassen’s reformulation of the rationality of belief, points towards a new and pragmatist dissolution of the ‘problem of scientific realism’.     

Sufficient conditions for uniqueness in Candecomp/Parafac and Indscal with random component matrices

A key feature of the analysis of three-way arrays by Candecomp/Parafac is the essential uniqueness of the trilinear decomposition. We examine the uniqueness of the Candecomp/Parafac and Indscal decompositions. In the latter, the array to be decomposed has symmetric slices. We consider the case where two component matrices are randomly sampled from a continuous distribution, and the third component matrix has full column rank. In this context, we obtain almost sure sufficient uniqueness conditions for the Candecomp/Parafac and Indscal models separately, involving only the order of the three-way array and the number of components in the decomposition. Both uniqueness conditions are closer to necessity than the classical uniqueness condition by Kruskal. Part of this research was supported by (1) the Flemish Government: (a) Research Council K.U. Leuven: GOA-MEFISTO-666, GOA-Ambiorics, (b) F.W.O. project G.0240.99, (c) F.W.O. Research Communities ICCoS and ANMMM, (d) Tournesol project T2004.13; and (2) the Belgian Federal Science Policy Office: IUAP P5/22. Lieven De Lathauwer holds a permanent research position with the French Centre National de la Recherche Scientifique (C.N.R.S.). He also holds an honorary research position with the K.U. Leuven, Leuven, Belgium.     

The role of mental rotation and age in spatial perspective‐taking tasks: when age does not impair perspective‐taking performance

The relationship between self‐evaluation of sense of direction, mental rotation, and performance in map learning and pointing tasks has been investigated in a life‐span perspective. Study 1 compared younger and older people in the Mental Rotation Test (MRT) and on the Sense of Direction and Spatial Representation (SDSR) Scale. Older people achieved higher scores on the SDSR Scale, but a lower performance in MRT compared with younger participants. In Study 2, groups of younger and older adults, one of each, were matched in the MRT, and pointing tasks in aligned and counter‐aligned perspectives were administered. Our results showed that, when so matched, older participants performed better than the younger counterparts in perspective‐taking tasks, but their performance was worse in map learning. Aligned pointing was performed better than the counter‐aligned task in both age groups, showing an alignment effect. Furthermore the performance in the counter‐aligned pointing was significantly correlated with MRT scores. Copyright © 2006 John Wiley & Sons, Ltd.     

Relationship Characteristics and Risk of HIV Infection: Rusbult's Investment Model and Sexual Risk Behavior of Gay Men in Steady Relationships1

This study examined the effects of relationship characteristics, as measured by Rusbult's (1980) investment model, on safer‐sex behavior between steady gay male partners. Analyses showed that low satisfaction with the relationship was associated with more risky unprotected anal intercourse (UAI). High commitment to the relationship was associated with more practice of negotiated safety (i.e., having safe UAI after both partners have tested negative for HIV and have reached sexual safety agreements). High relationship investment was associated with more risky UAI (borderline significant). We conclude that using relationship satisfaction, commitment, and investment as co‐determinants of sexual risk behavior could prove useful in the development of new HIV‐prevention strategies for gay men in relationships.