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261.
Antony S. R. Manstead Dianne Parker Stephen G. Stradling James T. Reason James S. Baxter 《Journal of applied social psychology》1992,22(7):509-530
This paper reports a study of perceptions of the prevalence of certain driving errors and violations in a large ( N = 1,656) sample of drivers. In keeping with previous research on perceptions of social consensus, it was predicted that (a) drivers who reported that they themselves regularly commit these errors and violations would make larger estimates of the percentage of other road users who regularly engage in these behaviors, by comparison with drivers who reported that they do not regularly commit these errors and violations; (b) comparison of estimates of social consensus for own behavior with the actual numbers of respondents reporting that they did or did not engage in these behaviors would show that those who do commit the behaviors regularly would overestimate consensus for their position, while those who do not commit the behaviors regularly would underestimate consensus for their position; and (c) these tendencies to overestimate or underestimate actual consensus for own position would be correlated with the perceived offensiveness to others of the behavior concerned, such that departures from actual consensus would be greater for behaviors rated as more offensive. The results provide strong support for the first two predictions but none for the third; indeed, the degree of over- or underestimation tended to be inversely related to offensiveness. In addition, there were unanticipated but highly consistent sex and age differences in perceptions of the prevalence of the target behaviors, with female and younger respondents making higher estimates than male and older respondents, respectively. The theoretical and practical implications of these findings are discussed. 相似文献
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263.
Twenty-four 14- to 30-month-old children observed a model use 20 new words as labels for objects of varied semantic associations. Acquisition of the new words was clear in both elicited and spontaneous imitation by the children and in generalized use of the words. Age was highly and positively correlated with elicited and spontaneous imitation and scores for recognition of the objects associated with the words. Imitation and recognition scores were highest for words associated with food and active objects and low for passive objects and words with no associations. Older children's use of the words immediately after the model's use increased rapidly with the first two presentations, and their use of the words prior to the model's use showed an increasing trend over the series of modeling sessions. Younger children responded at a lower rate. 相似文献
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266.
In a picture-word version of the Stroop task, 30 right-handed subjects were tested under each of six conditions in which a picture alone or a picture plus a word were presented to the left, the right, or both hemispheres. In two additional conditions the picture was presented to the right hemisphere and the word was simultaneously presented to the left hemisphere, or vice versa. For all conditions, subjects were instructed to name the picture only, as rapidly as possible. Picture naming times were significantly slower for the conditions in which the pictures were accompanied by words than in the respective picture alone conditions. Moreover, simultaneous presentation of a picture and a word to both hemispheres resulted in greater interference (slower picture naming times) than did the simultaneous presentation of the picture and the word to either the left hemisphere alone or the right hemisphere alone. The latter two conditions, in turn, resulted in significantly more interference than did the simultaneous presentation of the picture to one hemisphere and the word to the other hemisphere. This pattern of results suggests that the Stroop effect obtained under normal circumstances is in large part a function of the interference caused by the simultaneous processing of items in the same hemisphere. In contrast to hemispheric differences reported for the color-word Stroop task, the effect of presenting a picture and word simultaneously to the right hemisphere did not differ reliably from that of presenting a picture and word to the left hemisphere. The failure to replicate this aspect of the color-word Stroop is attributed to differences in the abilities of the two hemispheres to process the respective target items (the color or the picture) of the two tasks. 相似文献
267.
Patterns of habituation of subjective anxiety during flooding in fantasy are delineated for eleven obsessive-compulsive and six agoraphobic patients. The majority showed a curvilinear pattern of subjective anxiety response, while three patients showed a linear decelerating pattern. Habituation was found both within and across sessions. The results are compared with habituation patterns in physiological responses during flooding in fantasy and in vivo. 相似文献
268.
Barbara A. Brooks Dianne M. K. Impelman Janet T. Lum 《Attention, perception & psychophysics》1981,30(1):62-70
Visual masking effects on test flash thresholds were measured under real and simulated eye movement conditions to determine whether visual masking is primarily responsible for elevations in threshold that are sometimes associated with saccadic eye movements. Brief luminous flashes presented to the central retina before, during, and after saccades were masked by stimuli presented either pre- or postsaccadically. The amount and time course of masking were quantitatively dependent on stimulus parameters of intensity and temporal separation and were unaffected by eye movement parameters (amplitude, velocity, direction) as long as retinal stimulus conditions were constant. The duration of forward masking was longer than that of backward masking. When retinal conditions during saccades were mimicked while the eyes were held steady, masking interactions were identical to those obtained during real saccades. These results indicate that masking effects during saccades in ordinary environments are determined solely by the stimulus situation at the retina. Putative nonvisual, centrally originating saccadic suppression suggested by other authors is evidently not additive with visually determined masking during saccades. 相似文献
269.
John L. Bradshaw Dianne Bradley Anne Gates Kay Patterson 《Attention, perception & psychophysics》1977,21(5):431-438
Subjects made timed manual responses in judging whether laterally presented four-letter words were identical to targets. In Experiment 1, nontargets differed by a single letter from targets. A right-field superiority occurred only for targets (which were detected fastest of all) and for nontargets where a letter changed at Position 2 or Position 3. Changes at initial and final positions were detected faster than the two middle positions, and there were no significant field differences. In Experiment 2, ascenders and descenders were controlled and changes were made in nontargets at all four letter positions, at Positions 1 and 4, at Positions 2 and 3, or at 2 alone. Response times for nontargets varied inversely with the number of differing letters, regardless of position. Significant field differences again only appeared for changes in the two middle positions. Letters at the beginning and end of a word seem to be processed faster than and differently from those within, where field differences are strongest. Vowel-consonant differences probably do not account for these effects, which are more compatible with some form of parallel, rather than either serial or holistic, processing. 相似文献
270.
Dianne Rahm 《Knowledge, Technology, and Policy》1999,12(1):74-83
Information technology, that assortment of technology that enables the conversion of data into information, has had an enormous impact on the field of public administration and its theoretical foundation. This article explores five of them. It begins with a discussion of one of the primary impacts of information technology on public administration theory: the development of systems theory and its descendants including the study of complex systems, chaos, and complexity theory. The importance of information technology in decision-making is explored next. Does information technology free us from the limits of bounded rationality or are we simply overwhelmed by the volume of information available via new sources, such as the Internet and the World Wide Web? The third role examined is the use of information technology as a research tool to make previously intractable problems solvable. Computer capability has enormously advanced the theoretical underpinnings of public administration. Fourth, the significance of information technology as a change agent that calls for revision of other theoretical postulates is investigated. As information technology has diffused into public organizations, how has it called into question what we previously thought about the foundation of bureaucracy? Finally, learning by doing and the manner through which practice informs theory is considered. 相似文献