Priming of pop-out: I. Role of features

We examined a visual search task, in which observers responded to the high-acuity aspect of a popout target (shape of an odd-colored diamond or vernier offset of an odd spatial-frequency patch). Repetition of the attention-driving feature (color or spatial frequency) in this task primes the popout; repetition of the high-acuity aspect (shape, vernier offset) does not. Priming of pop-out is due to a decaying memory trace of the attention-focusing feature laid down with each trial. The trace exerts a diminishing effect over the following five to eight trials (≈30 sec), and its influence over this time is cumulative. Observers cannot willfully overcome the priming, which suggests that it is passive and autonomous. Both target facilitation and distractor inhibition are evident; the former has a greater effect. The phenomenon shows complete binocular transfer.     

A new theory of content I: Basic content

Philosophers of science as divergent as the inductivist Carnap and the deductivist Popper share the notion that the (logical) content of a proposition is given by its consequence class. I claim that this notion of content is (a) unintuitive and (b) inappropriate for many of the formal needs of philosophers of science. The basic problem is that given this notion of content, for any arbitraryp andq, (p Vq) will count as part of the content of bothp andq. In other words, any arbitraryp andq share some common content. This notion of content has disastrous effects on, for instance, Carnap's attempts to explicate the notion of confirmation in terms of probabilistic favorable relevance, and Popper's attempts to define verisimilitude. After briefly reviewing some of the problems of the traditional notion of content I present an alternative notion of (basic) content which (a) better fits our intuitions about content and (b) better serves the formal needs of philosophers of science.     

Primitive representation and misrepresentation

This paper develops a statistical approach to the problem of primitive representation. Representation of the kind commonly attributed to litmus paper, fuel gauges and tree rings occurs when, so to speak, there is a sufficiently good correlation between two variables. The fundamental distinction between misrepresentation and non-representation is explained in terms of the notion of an informationally useful correlation. The paper further argues that the statistical approach satisfactorily resolves well known puzzles such as Fodor's disjunction problem.     

Changing expectations: A longitudinal study of community attitudes toward a nuclear power plant

Initial and 5-year follow-up interviews were conducted with 213 residents of the host community for a nuclear power plant. The purpose was to determine possible changes in attitudes toward the plant and expectations about potential outcomes associated with construction. Large negative changes in attitudes toward the plant were noted and were accompanied most notably by decreased expectations of positive outcomes. The structure of the expectations remained essentially stable over the 5-year period. Perceptions of hazards, community disruption, and economic benefits as measured early in construction and during peak construction were found to be the best predictors of acceptance of the nuclear plant. Initial expectations were found to predict overall attitude toward the plant 5 years later. Results were discussed in terms of implications for social impact assessment, large-scale community change, and the predictability of community attitudes toward nuclear power plant construction.     

PERCEPTION OF THE EMOTIONAL CONTENT OF SPEECH BY CANADIAN AND MEXICAN CHILDREN,ADOLESCENTS, AND ADULTS

The study at hand was undertaken to assess and compare the respective abilities of Canadian and Mexican subjects to identify emotion in speech. Canadian and Mexican female teachers, speaking whatever words they wished in their own languages, attempted to simulate four emotional states (i.e., happiness, sadness, love, and anger). After the initial recording, these samples were passed through an electronic filter which removed the semantic content while leaving intact the tonal qualities of the speech. The filtered vocal expressions were played to Canadian and Mexican subjects 5, 9, 13, 17, 25, 45, and 65 years of age. From 5 through 25, there was a progressive increase with age in ability to identify the emotion expressed. Ability did level off, however, and eventually even decreased (such that the 65 year-olds performed less accurately than the other adult groups). Overall, the Mexican subjects were significantly more sensitive to emotion in speech than their Canadian counterparts. As well, both Canadian and Mexican subjects judged speech samples from Mexican speakers more accurately than those from Canadian speakers.     

Cognitive and attentional deficits in children vulnerable to psychopathology

Cognitive and attentional deficits were assessed in children with either a schizophrenic, an affectively disordered or a normal parent. The children were grouped both by their parents' DSM-II diagnoses (broadly defined group of schizophrenics and heterogeneous group of depressives)and by a new set of diagnoses (narrowly defined group of schizophrenics, unipolar depressive group and bipolar group). Children whose parents met the more stringent criteria for schizoprhenia performed somewhat more deviantly than children whose parents met only DSM-II criteria. In addition, the importance of splitting the heterogeneous depressive group into more homogeneous subgroups is indicated by the findings that children of unipolar parents generally could not be distinguished from children whose parents are schizophrenic. On the other hand, children of bipolar parents performed reliably better than children of schizophrenics. These findings are viewed within the context of current high-risk studies and psychological deficit literature and suggest that diagnostic issues require more attention by researchers in these areas.This research was supported by Grant MH 21145 from the National Institute of Mental Health. The authors are indebted to Lina Jandorf for assistance in testing the children and with the data analyses.     

Sexist attitudes and authoritarian personality characteristics among Australian adolescents

This paper examines the suggestion that sexism is a central feature of authoritarianism among young people. One hundred seventeen Australian adolescent schoolchildren completed questionnaires containing Phillips' (1979a, Child Study Journal, 9, 21–35) measure of classical authoritarianism for children and balanced measures of two other aspects of authoritarianism, namely, directiveness, modified from Ray (1976, Human Relations, 29, 307–325) and attitude to authority, modified from Rigby and Rump (1981, Journal of Psychology, 109, 109–118). Factor analyses of the results for classical authoritarianism replicated Phillips' earlier finding with younger schoolchildren that eight items identified as reflecting a sexist attitude loaded substantially on a first varimax rotated factor. These eight items constituted a reliable sexism scale (α = .80), which correlated significantly with the remainder of the classical authoritarianism scale, after controlling for the contribution of age (partial r = .30). However, the partial correlations with balanced measures of directiveness and attitude to authority were not significant. These results suggest that sexism may be one aspect of authoritarianism, rather than a central feature.     

Educational and career aspirations of sixteen-year-olds Ken

Data obtained at the 16-year stage of the National Child Development Study provide information on the job expectations, aspirations and educational plans of some 12,000 young people in their final year of compulsory schooling. The interrelationships among these measures, and the associations with, for example, sex, social class and ability, are examined.