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21.
Previous studies have found that children have difficulty solving proportional reasoning problems involving discrete units until 10 to 12 years of age, but can solve parallel problems involving continuous quantities by 6 years of age. The present studies examine where children go wrong in processing proportions that involve discrete quantities. A computerized proportional equivalence choice task was administered to kindergartners through 4th-graders in Study 1, and to 1st- and 3rd-graders in Study 2. Both studies involved 4 between-subjects conditions that were formed by pairing continuous and discrete target proportions with continuous and discrete choice alternatives. In Study 1, target and choice alternatives were presented simultaneously; in Study 2, target and choice alternatives were presented sequentially. In both studies, children performed significantly worse when both the target and choice alternatives were represented with discrete quantities than when either or both of the proportions involved continuous quantities. Taken together, these findings indicate that children go astray on proportional reasoning problems involving discrete units only when a numerical match is possible, suggesting that their difficulty is due to an overextension of numerical equivalence concepts to proportional equivalence problems. 相似文献
22.
The research investigated impressions formed of a "teacher" who obeyed an experimenter by delivering painful electric shocks to an innocent person (S. Milgram, 1963, 1974). Three findings emerged across different methodologies and different levels of experimenter-induced coercion. First, contrary to conventional wisdom, perceivers both recognized and appreciated situational forces, such as the experimenter's orders that prompted the aggression. Second, perceivers' explanations of the teacher's behavior focused on the motive of obedience (i.e., wanting to appease the experimenter) rather than on hurtful (or evil) motivation. Despite this overall pattern, perceptions of hurtful versus helpful motivation varied as a function of information regarding the level of coercion applied by the experimenter. Finally, theoretically important relationships were revealed among perceptions of situations, motives, and traits. In particular, situational cues (such as aspects of the experimenter's behavior) signaled the nature of the teacher's motives, which in turn informed inferences of the teacher's traits. Overall, the findings pose problems for the lay dispositionism perspective but fit well with multiple inference models of dispositional inference. 相似文献
23.
A general connectionist model of attitude structure and change: the ACS (Attitudes as Constraint Satisfaction) model 总被引:1,自引:0,他引:1
A localist, parallel constraint satisfaction, artificial neural network model is presented that accounts for a broad collection of attitude and attitude-change phenomena. The network represents the attitude object and cognitions and beliefs related to the attitude, as well as how to integrate a persuasive message into this network. Short-term effects are modeled by activation patterns due to parallel constraint satisfaction processes, and long-term effects are modeled by weight changes due to the settling patterns of activation. Phenomena modeled include thought-induced attitude polarization, elaboration and attitude strength, motivated reasoning and social influence, an integrated view of heuristic versus systematic persuasion, and implicit versus explicit attitude change. Results of the simulations are consistent with empirical results. The same set of simple mechanisms is used to model all the phenomena, which allows the model to offer a parsimonious theoretical account of how structure can impact attitude change. This model is compared with previous computational approaches to attitudes, and implications for attitude research are discussed. 相似文献
24.
A purported hallmark of temperament characteristics is that they appear very early in the course of development and are persistent across time and situation. There is, however, a small, but growing cadre of research findings that question this traditional view. It may be that temperament characteristics are not necessarily established during the first few months of development or are not stable over time. A secondary analysis of the New York Longitudinal Study (NYLS) temperament data was conducted to investigate the hypothesis that temperament has a complex developmental course over the first five years of development. A latent growth curve analysis of difficult temperament suggests that temperament development follows a non‐linear trajectory. This finding, in concert with related findings, suggests the need for a broader discussion of the possible developmental processes that underlie these patterns. Copyright © 2007 John Wiley & Sons, Ltd. 相似文献
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Across diverse theoretical orientations, vulnerable self-esteem (SE) is thought to act as a diathesis for depression after life stress. In the present study, the roles of trait-level SE, low SE primed by depressed mood, and labile SE in prospectively predicting changes in depressive symptoms in a nonclinical sample (n = 192) were examined. Results indicated that labile SE predicted increases in symptoms. Furthermore, a 3-way interaction (Labile SE x Academic Stress x Initial Depression) suggested that in Ss who were initially asymptomatic, lability made Ss differentially vulnerable to increases in depressive symptoms after stress. In contrast to labile SE, trait-level SE and priming of low SE were relatively weak predictors of changes in depressive symptoms and did not interact with stress. 相似文献
27.
Shy people are characterized as engaging in self-derogatory thinking leading to anxiousness and inhibition, while people who are publicly self-conscious are focused on the impression they create on others. In addition, public self-consciousness has been described as an antecedent of shyness. In the present research, we tested additive versus interactive hypotheses about the association of shyness and public self-consciousness with dysfunctional social interaction. Undergraduate men varying in shyness and public self-consciousness engaged in a conversation with an unfamiliar woman confederate. Following the conversation, subjects completed self-report measures focusing on their responses during the conversation. Only main effects for shyness and public self-consciousness were found, supporting an additive hypothesis. Shyness was related to all dependent variables reflecting a negative self-bias, while public self-consciousness was not. In particular, shyness was inversely related to the balance of subjects' positive and negative thoughts and to reported use of protective as well as avoidance of acquisitive self-presentation responses. Public self-consciousness was positively related to use of protective self-presentation responses but unrelated to acquisitive responses. 相似文献
28.
The Dimensions of Life Stress and the Specificity of Disorder 总被引:1,自引:0,他引:1
Stress and related concepts have long been associated with ideas about the genesis of mental and physical disorders. The concepts linking stress to disorder, however, have typically been very general in nature. The theme of the present paper is that such nonspecific principles may obscure more specific relations between relatively distinct forms of life stress and particular types of disorder outcome. The historical progression of ideas on this topic is traced and the assumptions behind specificity and nonspecificity models of disorder are outlined. The implications of these developments are next illustrated in regard to current conceptual and operational shortcomings. Recent research that has overcome these limitations and suggests the viability and importance of more specific linkages between particular forms of stress and disorders is selectively reviewed. Finally, the paper concludes with some speculative comments on the problems facing investigators interested in translating stress concepts into operational procedures. 相似文献
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Correlates of adolescent poor sleepers. 总被引:1,自引:0,他引:1