Persistence and change in sex-role stereotypes

Persistence and change in sex-role stereotypes were examined by replicating in 1978 a study of sex-role conceptions published by Sherriffs and McKee in 1957. Results suggested that in many particulars sex-role stereotypes have changed little over the intervening two decades. Respondents of both sexes continued to view men as more forceful, independent, stubborn, and reckless than women; and women continued to be viewed as more mannerly, giving, emotional, and submissive than men. On the other hand, many changes in sex-role conceptions were also found to have occurred. Especially for female respondents, results suggested that stereotypes have changed in the direction of greater favorability toward women and less favorability toward men. The relevance of these findings to the psychological understanding of social change is discussed.     

Color sensation of normal and anomalous trichromats measured by magnitude estimation

Summary Colors perceived by normal, protanomalous, and deuteranomalous trichromats were scaled by magnitude estimation. As a result, opponent-colors functions were obtained which show the hue sensations produced by spectral lights. For color-normal observers, the loci of maximal hue sensations were different in some aspects from those expected from current opponent-colors theories.The results obtained from the anomalous observers confirm the view that the causes of prot- and of deuteranomalous vision consist in reverse shifts of the long- and middle-wavelength cone sensitivities respectively. It was found that anomalous trichromats perceive less red in the violet spectrum than do normal subjects. This finding may be explained by the hypothesis that short-wave-length red is produced by a secondary maximum of the long-wavelength cone excitation. In the experiment, the main defect of anomalous trichromats, compared with normal subjects, consisted in the high instability of hue perception and hue recognition. This instability may be explained by an unfavorable signal/noise relation created by the similarity of the two long-wavelength receptor sensibilities in the anomalous red/green systems.     

BIOFEEDBACK OF EVENT-RELATED SLOW POTENTIALS OF THE BRAIN

A biofeedback paradigm was developed for self-regulation of cortical DC-shifts. Subjects received continuous visual feedback of their actual DC-shift during six sec. intervals. Feedback trial series alternated with transfer test trial series. Several studies demonstrated that subjects are able to achieve cortical self-regulation which is maintained and even improved in transfer test trials. This method is used to investigate the covariation of DC-shifts and performance in reaction time tasks, mental tasks and signal detection by varying DC-shifts systematically. The procedure was also applied to different patient groups to test the functional significance of distinct brain regions and to explore deficits in patient groups.     

Divergent Perceptions of Jail Inmates and Correctional Officers: The “Blame the Other-Expect to Be Blamed” Effect1

Inmates and correctional officers in a Lwnty jail made attributions of responsibility and predicted each other's attributions in response to four hypothetical stimulus incidents varying in severity of the inmate's intentional misbehavior and the severity of the officer's intentional retribution. When the misbehavior and retribution were moderate, subjects blamed both participants about equally. However, both over- and underreactions to the stimulus inmate's misbehavior elicited defensiveness, with both officers and inmates more likely to attribute responsibility to their opposite role character. In addition, both inmates and officers appeared to respond defensively to severe but equitable retributions. Subjects blamed each other, and, anticipating the other's defensiveness, expected to be blamed. Examination of the data suggested that subjects may have responded stereotypically rather than empathetically, and that defensiveness impeded rather than facilitated predictive accuracy. Results were consistent with previous research, increasing the generality of the “blame the other-expect to be blamed” effect. Additional analyses indicated that inmates were more likely than officers to notice mitigating circumstances when considering the inmates' responsibility. Three recommendations were made which may help to forestall inmate reactivity to retributions: (1) Jail personnel should have objective and clear definitions as to what constitutes major and minor infractions; (2) inmates should be aware of these criteria; and (3) jail personnel should be sensitive to mitigating circumstances and moderate their retribution or anticipate possible reactivity from inmates.     

Impression formation and repeated measures: The design as a stimulus

This study investigates the possibility that results of within-subjects studies tend to be design-specific. In a study of impression formation 3×3 row-by-column designs were presented to two groups of judges. The first design (standard-design) included high. Medium, and low levels of the independent variables. The second design (comparison design) included a high/medium/low variation of one independent variable and a high/medium/high variation of the second variable. The judges were asked to reproduce informations. They received relevant informations (which should be reproduced) and additional informations (which were irrelevant for their task). The pattern of results is different within the two designs. While the standard-design reveals a significant main effect for the relevant information, the comparison-design reveals an additional interaction effect between relevant and irrelevant information. The results are attributed to the fact that the design itself is a stimulus.     

Effects of extradimensional discrimination training upon previously acquired stimulus control

In Experiment 1, three groups of pigeons were taught to discriminate vertical lines (positive) from horizontal (negative). One group was then given true-discrimination training between two colors, a second group was equally reinforced for responding to the colors (pseudodiscrimination), while the third group was not run. The pseudodiscrimination group then provided a flatter gradient on the dimension of line orientation than either of the others, which did not differ. A second experiment demonstrated that this flattening effect could be completely counteracted when pseudodiscrimination was followed by true discrimination before the generalization test. The results are discussed within the framework of current research on attentional factors governing generalization gradients; pseudodiscrimination affects tests of stimulus control rather than its acquisition. When it intervenes between acquisition and testing, it appears to produce a “lapse” rather than a “loss” of the memory of the first-trained stimuli.     

Book reviews

Facets of Buddhism Shotaro Iida, 1991 Delhi, Motilal Banarsidass 166 pp., Rs. 150 hb

Li Ao: Buddhist, Taoist, or Neo‐Confucian? T. H. Barrett, 1992 London Oriental Series, Vol. 39 Oxford, Oxford University Press x + 178 pp. £20

Spirituality & Emptiness Donald W. Mitchell, 1992 New York, Paulist Press, xvi + 224 pp. $12.95     

Intuition in the context of implicit memory

Summary Most recent work concerned with intuition has demonstrated that people can respond discriminatively to coherence that they cannot identify. Specifically, in a gestalt-closure task subjects were shown slides of paired drawings. One of the drawings represented a fragmented picture of a common object, whereas the other was constructed by rotation of the elements of the coherent gestalt. When the subjects were unable to name the object, they were urged to make a forced-choice decision regarding which of the two drawings represented a real object. The results showed that the proportion of pictures not correctly identified, that were nevertheless correctly selected as coherent, was significantly higher than chance. The current experiment replicated these findings. In addition, it was shown that a study phase with either coherent or incoherent picture primes can bias intuitive judgments in the test phase in accordance with a processing view. Incoherent-picture primes reduced the forced-choice decisions to a level of chance. Moreover, priming was found to be dependent on the similarity between the study and the test stimuli. We argue that a more fluent reprocessing of coherent, or primed, stimuli may be a basis for intuitive judgments. Intuition may go wrong when priming has favored an incoherent solution.     

Stimulus generalization of the effects of punishment

Three pigeons were trained to respond to seven spectral stimulus values ranging from 490 to 610 mμ and displayed in random order on a response key. After response rates had equalized to these values, a brief electric shock was administered when the subject (S) responded to the central value (550 mμ) while positive reinforcement for all values was maintained. Initially, there was broad generalization of the resulting depression in response rate, but the gradients grew steeper in the course of testing. When punishment was discontinued, the rates to all values recovered, and equal responding to all stimuli was reattained by two of the Ss. Stimulus control over the effects of punishment was clearly demonstrated in the form of a generalization gradient; this probably resulted from the combined effects of generalization of the depression associated with punishment and discrimination between the punished value and neutral stimuli.