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921.
Richard Popper Heather Dragsbaek Stephen F. Siegel Edward Hirsch 《Behavior research methods》1988,20(5):481-484
A pocket computer is described that can be used by subjects to self-administer cognitive tests in field situations. Two cognitive tests, a vigilance and an encoding task, were developed for this computer and used to test cognitive performance during a 30-day military field exercise. 相似文献
922.
Fathers typically adopt a more physically active style of play with their young sons than mothers, and boys often react more positively to play with fathers than with mothers. The current study examined whether differences in children's reactions were related to differences in parental play style or to parent per se. Eighteen 3-year-old boys were observed as they played with each parent in each of two playrooms — one conducive to the maternal style of play and one to the paternal play style. Both parents were highly flexible in adopting the play style typical of the other parent in the appropriate playroom. The boys reacted more positively to both parents when their play style was more physical and active, resembling the typical paternal style. Differences between parents were smaller than differences related to play environment, but were consistent with existing literature: fathers were more actively involved, took more initiative, and played more physically with their sons than did mothers.This research was supported by a research grant and leave fellowship from the Social Sciences and Humanities Research Council of Canada. We thank Kathleen Bloom, Anat Ninio and Michael Ross for their comments on earlier drafts of this paper. 相似文献
923.
Neural Network models are commonly used for cluster analysis in engineering, computational neuroscience, and the biological sciences, although they are rarely used in the social sciences. In this study we compare the classification capabilities of the 1-dimensional Kohonen neural network with two partitioning (Hartigan and Späthk-means) and three hierarchical (Ward's, complete linkage, and average linkage) cluster methods in 2,580 data sets with known cluster structure. Overall, the performance of the Kohonen networks was similar to, or better than, the performance of the other methods. 相似文献
924.
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. 相似文献
925.
Abstract— The diversity of American society raises concerns about whether authorities can maintain social cohesion amid competing interests and values The group-value model of justice suggests that authorities function more effectively when they are perceived as fair (e g, benevolent, neutral, and respectful) However, such relational evaluations may be effective only if authorities represent a group with which people identify In a diverse society, subgroup memberships may assume special importance People who identify predominantly with a subgroup may focus on instrumental issues when evaluating a superordinate-group authority, and conflicts with that authority may escalate if those people do not receive favorable outcomes Results indicate that subgroup identification creates problems for authorities only when people have strong subgroup subgroup identification and weak superordinate-group identification As long as people identify strongly with the superordinate group, even if they also identify strongly with their subgroup, relational issues will dominate reactions to authorities 相似文献
926.
Frederick L. Kitterle Russell S. Kaye Heather Nixon 《Attention, perception & psychophysics》1974,16(3):543-546
Campbell and Howell (1972) reported an effect called “monocular pattern alternation.” They found that a pattern composed of two orthogonal sinusoidal gratings, one horizontal and the other vertical, underwent rivalry when viewed monocularly for a period of time. In the present study, it has been shown that monocular pattern alternation depends upon the orientation of the pattern and the spatial frequency of its components. Fewer reversals were found for an obliquely oriented pattern than for a pattern with components in the horizontal and vertical meridians. Alternation rate was higher when the gratings were similar in frequency but differed in orientation than when the components of the pattern differed in both dimensions. It was concluded that pattern alternation reflects an antagonistic interaction between interdependent channels in the human visual system that respond to orientation and spatial frequency. 相似文献
927.
Patricia Pliner Heather Hart Joanne Kohl Dory Saari 《Journal of experimental social psychology》1974,10(1):17-22
A replication of the Freedman and Fraser (1966) “foot-in-the-door” technique was attempted in which subjects were exposed to one of two prior requests and were then asked to comply with a larger request. The results showed that subjects receiving prior requests complied with the larger request significantly more often than did control subjects. The mechanism by which the technique operates was discussed. 相似文献
928.
By most theories of lexical access, idiosyncratic aspects of speech (such as voice details) are considered noise and are filtered in perception. However, episodic theories suggest that perceptual details are stored in memory and mediate later perception. By this view, perception and memory are intimately linked. The present investigation tested this hypothesis by creating symmetric illusions, using words and voices. In two experiments, listeners gave reduced noise estimates to previously heard words, but only when the original voices were preserved. Conversely, in two recognition memory experiments, listeners gave increased old responses to words (or voices) presented in relatively soft background noise. The data suggest that memory can be mistaken for perceptual fluency, and perceptual fluency can be mistaken for memory. The data also underscore the role of detailed episodes in lexical access. 相似文献
929.
930.
Norton W. Milgram Beth Adams Heather Callahan Elizabeth Head Bill Mackay Celeste Thirlwell Carl W. Cotman 《Learning & memory (Cold Spring Harbor, N.Y.)》1999,6(1):54-61
Allocentric spatial memory was studied in dogs of varying ages and sources using a landmark discrimination task. The primary goal of this study was to develop a protocol to test landmark discrimination learning in the dog. Using a modified version of a landmark test developed for use in monkeys, we successfully trained dogs to make a spatial discrimination on the basis of the position of a visual landmark relative to two identical discriminanda. Task performance decreased, however, as the distance between the landmark and the “discriminandum” was increased. A subgroup of these dogs was also tested on a delayed nonmatching to position spatial memory task (DNMP), which relies on egocentric spatial cues. These findings suggest that dogs can acquire both allocentric and egocentric spatial tasks. These data provide a useful tool for evaluating the ability of canines to use allocentric cues in spatial learning. 相似文献