RELIABILITY AND FACTORIAL VALIDITY OF THE JUNIOR EYSENCK PERSONALITY QUESTIONNAIRE IN ZIMBABWE

Six-hundred and thirteen girls and 601 boys in Zimbabwe completed the Junior Eysenck Personality Questionnaire (JEPQ). The reliability of the Neuroticism (N) and Social Desirability (L) factors was acceptable but the Psychoticism (P) and Extraversion (E) factors possessed modest reliability. While the factorial validity of the P, N and L scales was acceptable, the factorial validity of the E scale was poor. L scores were significantly correlated with N and P scores among girls and boys. Whereas Zimbabwean girls reported higher P scores than did Canadian girls, Zimbabwean boys reported lower P scores than did Canadian boys. Zimbabwean girls and boys reported lower E and N and higher P scores than their Canadian counterparts. This study provides broad support for Eysenck's basic personality model, but it does not support the use of this version of the JEPQ, and especially the E scale, among Zimbabwean children.     

Acoustic analysis in the differentiation of Parkinson's disease and major depression

In its early stages, Parkinson's disease (P.D.) may be difficult to distinguish from major depression (M.D.) leading to inappropriate management. Both illnesses are characterized by psychomotor retardation. The neurovegetative symptoms used to diagnose M.D. are not specific and in P.D. may be due to the physical illness itself. Currently, differentiation of the two disorders relies on subjective clinical observation. Improved diagnostic accuracy based on more objective data is needed. To this end, this study used computerized acoustic analysis to contrast speech patterns in P.D. and M.D. The sample consisted of 30 P.D. patients without depression or dementia, 30 patients with uncomplicated M.D., and 31 normal controls, each 60 years of age or over. Of the acoustic variables studied, M.D. patients had significantly reduced rates of speech compared with P.D. patients. The data suggest that this temporal measure of speech may be useful in the differentiation of P.D. and M.D.     

PICTORIAL DEPTH PERCEPTION IN GHANAIAN CHILDREN1

Perception de la profondeur picturak chez les enfants ghanéens. — Une étude de la perception de la profondeur picturale chez 122 enfants ghanéens, fréquentant I'école primaire et âgés de 5 à 10 ans, a apporté les résultats suivants : — 1. l'identification correcte des représentations picturales des objets croît progressivement avec l'âge; ce qu'on peut interpréter comme un effet de l'expérience croissante avec les objets représentés. — 2. Les représentations picturales impliquant des abstractions, comme les lignes d'horizon ou les bords de route vues en perspective, sont fréquemment mal identifiées, quelque soit l'âge. Elles sont perçues bidimensionnellement et communément identifiées comme des objets, à qui est souvent attribuée une fonction d'utilité par rapport aux autres composantes du dessin. — 3. Un seul enfant donne des preuves constantes d'une perception tridimensionnelle. Les réponses des autres sujets suggèrent une perception bidimensionnelle. l'A. pense que la familiarité, culturellement déterminée, avec un matériel pictural est d'une importance critique pour le développement de la perception par les enfants de la profondeur picturale. — 4. Une analyse des explications relatives aux relations causales entre les é1éments picturaux suggère I'existence d'un schème commun de pensée, quelque soit l'âge. Ce schème est comparable à la “ pensée égocentrique ” telle que la conçoit Piaget, à condition qu'un contexte culturellement familier puisse entraîner différents schèmes de pensée.     

Everettian quantum mechanics without branching time

In this paper I assess the prospects for combining contemporary Everettian quantum mechanics (EQM) with branching-time semantics in the tradition of Kripke, Prior, Thomason and Belnap. I begin by outlining the salient features of ??decoherence-based?? EQM, and of the ??consistent histories?? formalism that is particularly apt for conceptual discussions in EQM. This formalism permits of both ??branching worlds?? and ??parallel worlds?? interpretations; the metaphysics of EQM is in this sense underdetermined by the physics. A prominent argument due to Lewis (On the Plurality of Worlds, 1986) supports the non-branching interpretation. Belnap et?al. (Facing the Future: Agents and Choices in Our Indeterministic World, 2001) refer to Lewis?? argument as the ??Assertion problem??, and propose a pragmatic response to it. I argue that their response is unattractively ad hoc and complex, and that it prevents an Everettian who adopts branching-time semantics from making clear sense of objective probability. The upshot is that Everettians are better off without branching-time semantics. I conclude by discussing and rejecting an alternative possible motivation for branching time.     

Genetics and delusional disorder

This article gives an overview of genetic research approaches and their application to delusional disorder. Most studies have been based on small samples and have had other methodological limitations, so it is not clear whether there is a genetic contribution to the aetiology of delusional disorder. It is unlikely that delusional disorder is strongly related genetically to affective disorder or schizophrenia, but more subtle relationships cannot be ruled out. The rarity of multiply affected families prohibits linkage studies and, to date, molecular genetic investigations have been mainly limited to small association studies of dopamine receptor polymorphisms. A range of considerably larger, epidemiologically rigorous studies is required, but the uncommonness and other features of the disorder put strong limitations on the prospects for ascertaining adequate samples.     

II. Hamlet without the prince of Denmark revisited: Pörn on Kierkegaard and the self

Ingmar Pörn (Inquiry 27 [1984], nos. 2–3) claims that certain ideas of Kierkegaard's can illuminate a notion of the self articulated in action‐theoretical terms. Through a reconstruction of Kierkegaard's concept of despair, couched in these terms, Pörn aims to show how these ideas can contribute to the study of the self. Because he misconstrues an important distinction in Kierkegaard's account of selfhood, Pörn fails to show this. It remains uncertain what use the study of the self would have for Kierkegaard's notion of selfhood, and whether an action‐theoretical analysis is capable of bringing out whatever may be of interest in it.