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Behavioral contrast in one component of a multiple schedule as a function of the reinforcement conditions operating in the following component 总被引:3,自引:3,他引:0 下载免费PDF全文
The key pecks of four pigeons were reinforced on a variable-interval 5-min schedule which operated in each of the four components of a multiple schedule, indicated by red, green, yellow, and blue stimuli and presented in such an order that the red stimulus always preceded the yellow and the green stimulus always preceded the blue. After establishing baseline rates, the reinforcement schedule associated with the blue and yellow components was altered so that one was now an extinction schedule and the other was a variable-interval 1-min schedule. In a second experimental stage, the blue stimulus was interchanged with the yellow so that the red stimulus preceded the blue and the green stimulus preceded the yellow. In both experimental stages the response rate in the variable-interval 5-min component that preceded the extinction component was higher than the response rate in the variable-interval 5-min component that preceded the variable-interval 1-min component. The results were discussed in relation to the importance of stimulus ordering in experiments concerned with investigating behavioral contrast. 相似文献
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Following substantial bleaching by "white" light, absolute threshold, relative spectral sensitivity and sensation of hue of monochromatic lights were measured at the central fovea during the cone-plateau period. The absolute-threshold level was found to increase and then decrease markedly, the relative spectral sensitivity remained invariant, while the sensation of hues of monochromatic lights from the long- and middle-wave regions of the spectrum changed toward hues of shorter wavelengths. 相似文献
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Three different aspects of children's social competency were studied, i.e. social methods, (via their suggested solution to given conflict situations), social understanding (via their explanations of the solution given) and role-taking capacity. 75 boys—ages 6, 8 and 12 years—were interviewed concerning different conflict situations, six of which involved a child/child interaction and six a child/adult interaction. A separate role-taking task was also used. Developmental differences in social methods were found only in situations involving adults, where older children to a greater extent chose altruistic methods for solving the conflict. As regards social understanding, developmental changes were found and correspond to results reported by previous researchers. Role-taking capacity was found to increase with age. Role-taking as measured here was not related to social understanding. Social method and social understanding were significantly related to each other in some of the situations, mainly in those involving only children. The results indicate that different norms prevail for solving conflicts with adults versus with peers, and that the role-taking aspect is but one of several involved in the development of social understanding. 相似文献
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A systemic treatment approach, namely systemic belief therapy, has been found to be useful when dealing with families constraining beliefs when experiencing physical health problems. Two interventions which facilitate the altering of constraining beliefs are the externalization of physical symptoms and therapeutic letters. Epileptic seizures are examined in the context of the interaction between families and health care professionals. A case example is presented which highlights the use of this systemic approach to assist a young couple in challenging their beliefs about their ability to control and monitor epileptic seizures. 相似文献
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Abstract.— Three different ways of using the concept of rehearsal were discussed. Examples were presented showing confusions in the literature due to a failure to distinguish these three definitions. A free recall experiment was conducted with the purpose of investigating three problems relating to the concept of rehearsal: ( a ) an unclear relationship between overt and covert repetition, ( b ) whether overt repetition excluded other control processes, and (c) whether a shallow repetition produces a permanent memory trace or not. Using a pronounced time pressure it was demonstrated first that overt repetition facilitated recall performance of recency items and that recall of primacy items was facilitated by covert repetition. Secondly, it was shown that overt repetition did not exclude other types of encoding. Finally, a shallow maintaining repetition did not produce a permanent memory trace. The results are interpreted as supporting a level of processing point of view rather than a multistore approach. 相似文献
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In an earlier issue of this journal, Fred Vollmer criticizes Allport's rejection of operational definitions (Vollmer, 1974), He states that it is useless to postulate an internal structure behind or within the observations made of personality. These observations constitute personality. Thus psychologists should only study the observed phenomena and operational definitions are important tools in this endeavour. In this reply we want to show that his views are confused and try to point out the roots of this confusion. 相似文献
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Thirty nonconservers from first- and second-grade classrooms, 15 of whom had received perceptual/attentional training, were tested on four Piagetian conservation tasks (number, length, and continuous quantity solid/liquid) presented on 16 mm movie film with taped instructions. Eye movements were recorded during the response period for each task. Subsequent analyses of eye-movement patterns showed clear differences between the training and control groups. Trained conservers showed more visual exploratory activity and less perceptual centration than control group subjects. Moreover, the eye-movement patterns of trained conservers closely approximated those shown by natural (i.e., untrained) conservers in previous studies. The findings were discussed in terms of possible cognitive structural changes resulting from conservation training. 相似文献
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BJÖRN SALOMONSSON 《The International journal of psycho-analysis》2007,88(1):127-146
Infants suffer to a considerable degree from disturbances in nursing, sleep, mood, and attachment. Psychotherapeutic methods are increasingly used to help them. According to case reports, psychoanalytic work with infants and mothers has shown deep‐reaching and often surprisingly rapid results, both in symptom reduction and in improved relations between mother and child. The clinical urgency of the method makes it important to study its results and theoretical underpinnings. Among the theoretical issues often raised in discussions on this modifi ed form of psychoanalysis, those addressing the nature of communication between analyst, baby, and the mother are the most frequent. For example, how and what does an infant understand when the analyst interprets to her? What does the analyst understand of the infant's communication? These issues are addressed by investigating the infant's tools for understanding linguistic and emotional communication, and by providing a semiotic framework for describing the communication between the three participants in the analytic setting. The paper also investigates problems with the traditional ways of using the concept of symbolization within psychoanalytic theory. The theoretical investigation is illustrated by two brief vignettes from psychoanalytic work with an 8 month‐old girl and her mother. demand for the breast. Like the two lovers in the blues, they seemed to be slaves to 相似文献