How Philosophy Lost Perceptual Expertise

If we think of perceptual expertise, we might think ofa neurologist interpreting a CAT scan or an astronomerlooking at a star. But perceptual expertise is notlimited to experts. Perceptual expertise is atthe heart of our everyday competence in the world. Wenavigate around obstacles, we take turns inconversations, we make left-turns in face of on-comingtraffic. Each of us is a perceptual expert (thoughonly in certain domains). If we misunderstandperceptual expertise, we risk misunderstanding ourepistemic relationship to the world. I argue that thestandard arguments for the received view of perceptualexpertise are problematic at best. Of course, theissue of whether the received view is actually correctis an empirical issue. But the decision to adopt thereceived view, I argue, was not a scientific decision,but was made by inheriting a philosophical tradition– which many philosophers today would question.     

Age and individual differences in visuospatial processing speed: Testing the magnification hypothesis

Forty young adults and 40 older adults performed seven visuospatial information processing tasks. Factor analyses of the response times (RTs) yielded a single principal component with a similar composition in both age samples. For both samples, regressing the mean RTs of fast and slow subgroups for the seven tasks (18 conditions) on the corresponding mean RTs for their age group accounted for 99% of the variance. Taken together, these findings suggest that individual differences in processing time were largely task independent. The magnification hypothesis, a simple mathematical model of the interaction between age and ability, is presented. This model correctly predicts the finding that in both the young and the older adult groups, individual differences increased systematically with task difficulty. The magnification hypothesis also explains the regression parameters describing individual differences among young adults and predicts correctly that equivalent parameters describe individual differences among older adults. According to the magnification hypothesis, the RTs of slower individuals are more affected by aging than those of faster individuals, and slower individuals may be more at risk with respect to other biological insults (e.g., changes in health status) as well.     

THE NATURAL GOD: A GOD EVEN AN ATHEIST CAN BELIEVE IN

Abstract. In this paper, I attempt to dissolve the theism/atheism boundary. In the first part, I consider last things, according to mainstream science. In the second part, I define the Natural God as the Force of Nature—evolving, unifying, maximizing—and consider Its relation to last things. Finally, I discuss our knowledge of the Natural God and Its relevance to our personal lives. I argue that we can know the Natural God through scientific reason combined with global intuition, and that this knowledge, from the perspective of last things, may help us achieve universal love, ethical action, and personal salvation.     

The physician's influence on informed consent for bone marrow transplantation

The influence of physician judgment on the disclosure, competency, understanding, voluntariness, and decision aspects of informed consent for bone marrow transplantation are described. Ethical conflicts which arise from the amount and complexity of the information to be disclosed and from the barriers of limited time, patient anxiety and lack of prior relationship between patient and physician are discussed. The role of the referring physician in the decision-making is considered. Special ethical issues which arise with use of healthy related bone marrow donors are discussed, as is the physician's discretion in raising questions of competency. It is concluded that in this setting, regardless of the theoretical goals of the physician, patients appear to utilize informed consent discussions to assess their capacity to trust the physician rather than as a time to weigh the large amount of relevant data. The conscientious physician best serves the patient with recommendation of the best medical alternative rather than with attempts to remain neutral.     

Self-esteem and reactance: Further evidence of attitudinal and motivational consequences

The present experiments were designed to explore further the relationship between self-esteem and reactance within the domains of achievement and persuasion. Previous research in the achievement context has shown that self-esteem and reactance are positively related. Experiment 1 sought to extend this relationship into the persuasion setting. As predicted, a positive self-esteem/reactance relationship was obtained. The second experiment was designed to identify a factor that might moderate the relationship between self-esteem and reactance: degree of freedom threat. Previous research in the persuasion context has shown that the aforementioned self-esteem/reactance relationship is attenuated or even reversed when freedom threat is low rather than high. Experiment 2 sought to extend this relationship into the achievement context. As predicted, the positive self-esteem/reactance relationship was considerably weakened in the low-threat environment of Experiment 2, especially in comparison to previous research in which freedom threat was considerably higher. Taken together, the present and previous studies show consistent relationships between self-esteem and reactance across achievement and persuasion domains, suggesting that the essence of reactance is similar in these two domains. Practical implications are also discussed.     

Reactions to uncertainty: A comparison of three motivational theories

This study attempted to explicate some of the variables underlying preference, pleasure, and reward. In order to accomplish this, Jones's (1966, 1969) information drive theory, Berlyne's (1967, 1971, 1973, 1978) optimal arousal potential theory, Helson's (1964, 1966, 1971, 1973) adaptation-level theory, and McClelland and Clark's (1953) discrepancy hypothesis were experimentally contrasted. Subjects (316) rated the hedonic tone, perceived uncertainty, arousing properties, and interest value of two series of visual stimuli of specified uncertainty. Regression analyses revealed that immediately prior experience with stimuli varying in uncertainty affected rating of perceived uncertainty and arousing properties but had no major effects on ratings of hedonic tone and interest value. The results did not support Jones's and McClelland and Clark's models. Berlyne's model seemed to account for the affective hedonic tone and interest results, while Helson's model best explained the nonaffective perceived uncertainty and arousal data. It was concluded that nonaffective variables are affected by short-term experience with uncertainty while affective variables are not. Speculations concerning the phenomenon of interest value were then offered.Jewish Child Care AssociationThis article is based on a dissertation submitted to the New School for Social Research in partial fulfillment of the Ph.D. requirements. I would like to thank Drs. Nathan Brody and Nathan Kogan for their help in conducting this experiment and preparing this article.     

Empathy and the relationship between attitudinal similarity and attraction

Subjects varying in their levels of trait empathy encountered an attitudinally similar or dissimilar other. Replicating past research, subjects expressed much greater attraction for a similar rather than dissimilar other. Extending past research, the relationship between attitudinal similarity and attraction was much stronger among those having a strong rather than weak empathic tendency. Explanations, theoretical implications, and limitations are discussed.     

Social Cognition and Evolutionary Psychology: Physical Attractiveness and Contrast Effects on Women's Self-perceived Body Image

Self-evaluations of body image were examined in a 2 (attractiveness of stimulus person) × 2 (sex of stimulus person) design to determine if contrast effects consistent with evolutionary psychology occur for women's self-perceptions of their body image. Main effects for attractiveness were hypothesized. Higher self-ratings for figure-related aspects of body image were predicted for women exposed to an unattractive male or female. These effects were significant. Women exposed to an unnattractive male or female had more positive feelings about figure-related aspects of their body image than women exposed to an attractive male or female. Contrast effects in accordance with evolutionary theory occur for aspects of body image that play a role in inferences regarding reproductive fitness.     

AN ANALOGUE EVALUATION OF ENVIRONMENTAL ENRICHMENT: THE ROLE OF STIMULUS PREFERENCE

To evaluate the effects of environmental enrichment on stereotypic self-injurious behavior (SIB), we conducted an assessment of preference for manipulating alternative stimuli rather than engaging in SIB. First, for each of 3 participants, a functional analysis of SIB was conducted in Phase 1. Participants were selected for Phase 2 if the functional analysis showed that SIB persisted in the absence of social consequences. In Phase 2, a preference assessment was conducted in which participants were observed manipulating preferred stimuli in a free-operant format. A measure was taken of time spent manipulating each stimulus and time spent engaging in SIB. In Phase 3, environmental enrichment was evaluated using stimuli that were preferred over the target response, and alternative treatments were evaluated in the event of environmental enrichment failure. Results suggested that the free-operant preference assessment (a) predicted the efficacy or inefficacy of an environmental enrichment procedure and (b) suggested possible treatment alternatives when environmental enrichment was ineffective. Collectively, the results may provide a basis for interpreting the idiosyncratic effects of environmental enrichment and a rationale for treatment selection when behavioral function is unknown.