Why does ingroup essentialism increase prejudice against minority members?

A study with British participants (N = 90) tested a potential mediator of the effect of essentialist beliefs about the national ingroup on prejudice against immigrants. Essentialist beliefs were defined as beliefs in genetic determinism, a basic assumption that group membership is “written in the blood” and that the groups’ boundaries and characteristics are determined by genetic and/or biological factors. Essentialist beliefs were expected to play an important role in the formation of prejudice. They were predicted to be associated with a reduction in the perceived possibility of immigrants’ adopting the mainstream culture. Further, it was expected that essentialist beliefs would be positively associated with perceptions of intergroup threat, which in turn would be associated with a stronger demand for immigrants adopting the mainstream culture. Taken together, essentialist beliefs were predicted to be associated with a greater discrepancy between the demand for and perceived feasibility of culture adoption. This discrepancy was hypothesized to mediate the effect of essentialist beliefs on prejudice against immigrants. Structural equation modeling analysis and mediation analysis supported the hypotheses, showing that essentialism attributed to the national ingroup results in people demanding something seemingly impossible from immigrants, and that this situation in which immigrants have little chance of fulfilling majority members’ expectations results in prejudice against them. Thus, results show that perceptions of the ingroup are associated with attitudes to the outgroup, and they outline an explanatory mechanism for the positive correlation between essentialism and prejudice which has been found in previous research. Theoretical and applied implications are discussed.     

Toward Meaningful Noise Research

The present review considers a series of studies of noise conducted in collaboration with Dr. Michel Loeb. This review attempts to provide a theoretical perspective as well as to summarize the most important findings of those studies. The work reviewed shows that noise effects interact with other variables, such that a noise effect on one sex is reversed for the other, and is also reversed at different times of the day. A second experiment confirmed this finding with a different arithmetic task. Further work indicated parallels between noise and fatigue, with aftereffects depending upon both work and noise. The final experiment repeated some of these findings with a different task battery of information processing tasks while showing that noise effects further depend on the meaningfulness of the noise background.     

Age Differences in Coping Resources and Satisfaction With Life Among Middle-Aged,Young-Old,and Oldest-Old Adults

The authors examined age differences in perceived coping resources and satisfaction with life across 3 older-adult age groups (45-64, 65-74, and 75 years and older). The 98 participants represented healthy, socially active, community-residing adults. Group comparisons were made on 12 individual coping scales, and an overall coping resource effectiveness score was computed. No significant differences were found for 11 of the coping resources or for overall coping resource effectiveness. Similar consistencies in life satisfaction were found across the 3 age groups. The findings indicate that (a) for healthy adults, the oldest old cope at least as effectively as their younger counterparts, despite their likelihood of encountering increased levels of stress; and (b) psychologically, old age may be viewed as a time of resilience and fortitude.     

Risk Versus Effort in the Assessment of Motor Fatigue

The choice of probability leffort (COPE) devices require fatigued subjects to choose between risk and effort. In a first experiment, where fatigue was induced by an intense or by a prolonged motor task and where the required effort was perceptual, the fatigue did not generalize to the test mode. A second experiment used motor fatigue of the arm or leg, and tested with arm muscle effort, showing that subjects fatigued with either limb chose riskier alternatives in order to avoid the effort. The data correlated with self-rated fatigue, and closely paralleled earlier work using perceptual fatigue and perceptual effort.     

Reactive Inhibition Theory and Intertrial Correlations

From certain theoretical properties of Hull’s reactive inhibition and from the known modest reliability of reminiscence measures, it follows that intertrial correlations among psychomotor test scores should be higher under distributed-practice conditions than under massed-practice conditions. This proposition was tested in a conventional practice distribution paradigm involving 168 Caucasian subjects. Bartlett’s test for the homogeneity of covariance matrices confirmed the prediction, and a sign test for matched correlation pairs showed that correlations in the distributed practice mode were significantly more often higher than those in the massed practice mode. These results refute the prevailing view that intertrial correlations are invariant with respect to practice distribution, and they strengthen the credibility of Hull’s principle of reactive inhibition.     

Development and Validation of a Dutch Translation of the Big Five Inventory (BFI)

The MMPI profiles of 74 low back pain patients who had previously been classified as "functional," "organic," or "mixed" were sorted into six profile groups. The six profile groups were those used by Pichot, Perse, Lekeous, Dureau, Perez, and Rychewaert (1972); denial, "conversion V" without defensiveness, "conversion V" with defensiveness, depressed/anxious, psychotic and normal. Results indicate that all six profile types are welt represented in the low back pain group. Evidence is also presented which shows that each of the pathological MMPI profile types examined across "functional," "organic," and "mixed" classification is significantly more elevated than a normal profile group on two scales (Lb, DOR) designed to measure functional aspects of pain. Pathological MMPI profile groups did not differ significantly from each other on the "functional," pain scales. The data presented in this study point to the relationship of various forms of psychopathology with "functional pain." The findings of this stud v would not support a homogeneous "pain personality" for low back pain patients. However, combined "conversion V" profiles accounted for 58% of the "functional" group, 45% of the "mixed" group and 35% of the "organic" group.     

A Note on Change in Creativity by Handedness Over A Maturational Time Period

Thirty left-handed and right-handed Ss (10 each from the second grade, fifth grade, and college) were compared on four subtests of the Torrance creativity test. At each age level, left-handed students had higher creativity scores than right-handers. The greatest differences were found on the Elaboration subtest.     

Evaluating OVal-9, An Instrument for Detecting Experiences of Value in Daily Occupations

The drastic increase of psychosocial ill health may point to the fact that current lifestyles produce longer lives, but with increased chronic disorders rather than greater health. Focus on current lifestyles, that is, on peoples' daily environments, are thereby warranted to develop models and methods for tracing health promoting factors inherent in people's daily participation and experiences. This study tests the content validity of OVal-9, an instrument based on the new concept; Occupational Value, among a sample of experts, students and clients. The result shows a good ability to assess the value that people experience in their daily occupations. We are convinced that measuring Occupational Value might be of importance in developing future strategies for intervention and prevention needed for the increasing incidence of mental ill-health.