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151.
Free recall, cued recall, color recall, organization in recall, and sorting of 3- and 4-year-olds was assessed on 9-item lists of objects that were orthogonally varied on color and category dimensions. Half of the children in each age group were presented items successively, and the other half simultaneously. Older children recalled more items than younger children in both free and cued recall, and also organized their recall more. Moreover, simultaneous presentation benefited the older, but not younger children. Clustering and sorting data suggested a decreasing reliance on perceptual information, and increasing utilization of conceptual information, over the preschool years. The results were discussed in terms of the importance of concrete, external stimulus support at both time of encoding and retrieval. 相似文献
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153.
Laboratory rats were rewarded for face-washing, rearing, or scratching by being given the opportunity to press retractable levers for food reward. Yoked control animals received the same number of lever presentations and food rewards, but did not have to face-wash, rear, or scratch to obtain the levers. The experimental animals showed increases in number of bouts of reinforced target behavior above control levels, and the total amount of time spent face-washing increased when a 1.5-sec criterion for reinforced bout length was introduced. The activities in this experiment were made to serve a discriminative as well as an instrumental function, since the cue to tell the rat which lever to press for reward when the levers were presented was the activity that the rat had engaged in to obtain lever presentation. In two separate experiments high levels of discrimination between behaviors were obtained. Discrimination was worse following scratching than after other actions, and scratching also showed relatively poor instrumental conditioning. The relationship between Pavlovian and instrumental conditioning processes in this situation is discussed. 相似文献
154.
Ear advantage for the processing of dichotic speech sounds can be separated into two components. One of these components is an ear advantage for those phonetic features that are based on spectral acoustic cues. This ear advantage follows the direction of a given individual's ear dominance for the processing of spectral information in dichotic sounds, whether speech or nonspeech. The other factor represents a right-ear advantage for the processing of temporal information in dichotic sounds, whether speech or nonspeech. The present experiments were successful in dissociating these two factors. Since the results clearly show that ear advantage for speech is influenced by ear dominance for spectral information, a full understanding of the asymmetry in the perceptual salience of speech sounds in any individual will not be possible without knowing his ear dominance. 相似文献
155.
A perceiver's actions, although based upon initially erroneous beliefs about a target individual may channel social interaction in ways that cause the behavior of the target to confirm the perceiver's beliefs. To chart this process of behavioral confirmation, we observed successive interactions between one target and two perceivers. In the first interaction, targets who interacted with perceivers who anticipated hostile partners displayed greater behavioral hostility than targets whose perceivers expected nonhostile partners. Only when targets regarded their actions as reflections of personal dispositions did these behavioral differences in hostility persevere into their subsequent interactions with naive perceivers who had no prior knowledge about them. Theoretical implications of the behavioral confirmation construct for social perception processes are discussed. 相似文献
156.
Thirty-one severely obese adults participated in behavioral weight control groups. In three groups utilizing powerful monetary contracts, subjects deposited substantial sums of money which were returned contingent on either attendance, calorie restriction, or weight loss. Subjects in a fourth no-contract control condition made no monetary deposits. Weight and calorie contract groups lost an average of nearly 20 lb in 10 weeks. They did not differ from each other, but both produced significantly more weight loss than the attendance contract group. High dropout rates in the no-contract condition precluded statistical evaluation of this group. Results are discussed in terms of the potential clinical value of contracting procedures. 相似文献
157.
Graham J Hitch 《Cognitive psychology》1978,10(3):302-323
A series of experiments explored the role of information storage in working memory in performing mental arithmetic. Experiment 1 assessed the strategies people report for solving auditorily presented multidigit problems such as 325 + 46. As expected, all subjects reported breaking down the problems into a series of elementary stages, though there were considerable individual differences with regard to the order of their execution. Strategies of this type necessitate both the temporary storage of information and the mobilization of long-term knowledge. Experiments 2 and 3 examined the effects of delaying the output of individual partial results on calculation accuracy and showed that interim information is forgotten if it is not utilized immediately. Experiment 4 showed that forgetting the initial information is also a source of error and suggested that forgetting increases as a function of the number of calculation stages intervening between initial presentation and subsequent utilization of information. Two simple quantitative models were derived from a general task analysis, one of which assumed a decay process in working storage and the other no decay. The decay model gave a reasonable fit to data from Experiments 2–4, and in doing so it coped appreciably well with the effects of a large variety of task variables (e.g., carrying, the provision of written notes, calculation strategy, output order). The decay model is a tractable analysis of a complex task, and it is suggested that similar analyses may prove fruitful for other problem-solving activities which involve the use of working memory. 相似文献
158.
Two experiments are reported in which the relationship is explored between the N1 and P2 components of the visual evoked potential and visual selective attention. In both experiments, channels were defined in terms of stimulus attributes (experiment 1 — intensity; experiment 2 — shape) with all stimuli being presented at a common spatial locus in order to preclude fixation shifts. Under these circumstances, P2 was found in both experiments to correlate with visual selective attention whereas N1 did not. It is concluded from the null result for N1 that a precortical gating mechanism for visual inputs within a single spatial channel is not a component of the visual system. The P2 correlate of visual selective attention, because of its long latency, is attributed to the differential post-perceptual processing inevitably received by task-relevant and task-irrelevant inputs. 相似文献
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160.
This research examined women's and men's social comparison preferences when evaluating the fairness of pay. Subjects were assigned randomly to work on a job described as masculine, feminine, or sex neutral and were told that they would be paid for their work. After working on the job and privately receiving identical payment, subjects rank ordered their preference for seeing the average male, average female, and average combined-sex wage paid in each of the three jobs. Despite the availability of the combined-sex wage, subjects preferred to maximize similarity in their wage comparisons, with the majority choosing to see the pay of a same-sex and same-job group first. Regardless of the sex linkage of their job assignment, subjects selected a same-job comparison first. Sex linkage of job did affect same-sex preferences; whereas subjects in sex-appropriate and sex-neutral jobs showed a significant preference for seeing the pay of same-sex others first, subjects in sex-inappropriate jobs did not. Results also indicated that both men and women assigned to the feminine job expected somewhat less pay and thought their obtained pay was more fair than did those assigned to the masculine job. Furthermore, women thought they deserved less pay for their work than did men, regardless of their job assignment. Implications of these results for gender differences in outcome evaluations are discussed. 相似文献