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191.
Regier T 《Cognitive Science》2005,29(6):819-865
Children improve at word learning during the 2nd year of life—sometimes dramatically. This fact has suggested a change in mechanism, from associative learning to a more referential form of learning. This article presents an associative exemplar-based model that accounts for the improvement without a change in mechanism. It provides a unified account of children's growing abilities to (a) learn a new word given only 1 or a few training trials ("fast mapping"); (b) acquire words that differ only slightly in phonological form; (c) generalize word meanings preferentially along particular dimensions, such as object shape (the "shape bias"); and (d) learn 2nd labels for already-named objects, despite a persisting resistance to doing so ("mutual exclusivity"). The model explains these improvements in terms of increased attention to relevant aspects of form and meaning, which reduces memory interference. The interaction of associations and reference in word learning is discussed. 相似文献
192.
Arousal, valence, and memory for detail 总被引:2,自引:0,他引:2
A common finding in the emotion-memory literature is that memory is enhanced for positively arousing stimuli and negatively arousing stimuli relative to neutral stimuli. We tested the notion that post-stimulus elaboration is responsible for these effects. Post-stimulus elaboration refers to the process of thinking about an event (after its offset) more frequently or more in-depth. We tested the hypothesis by presenting participants with 36 slides depicting events that varied in arousal (low and high) and valence (positive and negative). The opportunity for elaboration was manipulated by requiring participants, during the interslide interval, to complete addition problems, simply view the addition problems, or view a blank slide. Cued recall memory was tested for central and background details. Based on the post-stimulus elaboration hypothesis it was expected that the greatest memory decline would occur for the central details of negatively and positively arousing slides when participants were required to complete addition problems (i.e., a distractor task x arousal x detail interaction). Contrary to the hypothesis, we found that filling the inter-slide interval with a distractor task decreased memory for negative stimuli compared to positive stimuli. This effect was independent of arousal. We also found that arousal increased central detail memory for positive and negative stimuli and background detail memory for positive stimuli but not for negative stimuli. This interaction was explained on the basis of pre-attentive encoding and cue utilisation. It was concluded that in order to understand the complex relationship between emotion and memory, future studies should include, as a minimum, the variables of valence, arousal, and detail. 相似文献
193.
We compare the effects of psychoactive drugs such as morphine and amphetamine on the synaptic organization of neurons in the orbital frontal (OFC) and medial frontal (mPFC) regions in the rat. Both regions are altered chronically by exposure to intermittent doses of either drug but the effects are area-dependent. For example, whereas morphine produces increased spine density in OFC but decreased spine density in mPFC. The differential response of the OFC and mPFC to drugs is paralleled by an areal-dependent effect of gonadal hormones on these regions as well: males have greater dendritic arborization in the mPFC whereas females have a greater arborization in the OFC. We also compared the effects of neonatal injury to the OFC and mPFC on cognitive, motor, and social behaviors as well as on the anatomical organization of the remaining brain. Again, there were differential effects of the treatments to the OFC and mPFC. Neonatal OFC lesions allowed virtually complete functional recovery of cognitive and motor behaviors, which was correlated with mild abnormalities in cerebral development compared to the more severe deficits and morphological sequelae following mPFC lesions at the same ages. One exception was the effect of OFC on social behavior, which was severe regardless of whether the injury was in infancy or adulthood. It is proposed that both drug-induced and developmental abnormalities in the integrity of OFC neurons may lead to deficits in social behavior or other behavioral pathologies, possibly including depression. 相似文献
194.
McMorris T Tallon M Williams C Sproule J Draper S Swain J Potter J Clayton N 《Perceptual and motor skills》2003,97(2):590-604
The primary purpose was to examine the effect of incremental exercise on a noncompatible response time task. Participants (N=9) undertook a 4-choice noncompatible response time task under 3 conditions, following rest and during exercise at 70% and 100% of their maximum power output. Reaction and movement times were the dependent variables. Maximum power output had been previously established on an incremental test to exhaustion. A repeated-measures multivariate analysis of variance yielded a significant effect of exercise intensity on the task, observation of the separate univariate repeated-measures analyses of variance showed that only movement time was significantly affected. Post hoc Tukey tests indicated movement time during maximal intensity exercise was significantly faster than in the other two conditions. The secondary purpose of the study was to assess whether increases in plasma concentrations of adrenaline and nor-adrenaline during exercise and power output would act as predictor variables of reaction and movement times during exercise. Catecholamine concentrations were based on venous blood samples taken during the maximum power output test. None of the variables were significant predictors of reaction time. Only power output was a significant predictor of movement time (R2 = .24). There was little support for the notion that peripheral concentrations of catecholamines directly induce a central nervous system response. 相似文献
195.
Two questions about the relationship between arousal and memory were investigated: First, does the source of arousal influence memory, and, second, what impact does arousal have on memory for detail? In Experiment 1, physiological arousal (running or not running in place) was factorially combined with emotional arousal (viewing a neutral or an emotional slide sequence). Recognition memory was tested for gist, central detail, and background detail. Experiments 2 and 3 were similar to Experiment 1, with the exception that a cued recall task was used in Experiment 2 and physiological arousal was manipulated with stationary biking in Experiment 3. The results of these experiments indicated that physiological arousal had little impact on memory and that emotional arousal led to improvements in memory for both central and background detail. Overall, these results supported the notions that the source of arousal is an important determinant of an event’s memorability (Christianson, 1992a) and that emotional arousal serves to enhance the scope of memory (i.e., flashbulb memory; Brown &; Kulik, 1977). 相似文献
196.
Julie M. Duck Michael A. Hogg Deborah J. Terry 《Journal of applied social psychology》1999,29(9):1879-1899
People typically perceive negative media content (e.g., violence) to have more impact on others than on themselves (a third-person effect). To examine the perceived effects of positive content (e.g., public-service advertisements) and the moderating role of social identities, we examined students' perceptions of the impact of AIDS advertisements on self, students (in-group), nonstudents (out-group), and people in general. Perceived self-other differences varied with the salience of student identity. Low identifiers displayed the typical third-person effect, whereas high identifiers were more willing to acknowledge impact on themselves and the student in-group. Further, when influence was normatively acceptable within the in-group, high identifiers perceived self and students (us) as more influenced than nonstudents (them). The theoretical and practical implications of this reversal in third-person perceptions are discussed. 相似文献
197.
David J. Murray Jason Burhop Stephen Centa Nikil Chande Kirsten Oinonen Terry Thomas Treena Wilkie Bahar Farahmand 《Memory & cognition》1998,26(6):1196-1213
A set of experiments on immediate probed recognition of digit triples is reported in which the variables were list length (five, six, seven, or eight triples), the probability that a probe was old (.33, .5, or .67), and whether the digit triples were presented with an auditory component or articulatory suppression. Previous work had suggested that the false alarm (FA) rate in this paradigm was lower when auditory information was available than when it was not; this observation had led to the development of thepartial matching theory of immediate probed recognition, according to which FAs could arise not only as a result of unlucky guesses but also when new probes shared a first digit in common with a partially retained target triple. It was argued that partial memory representations were less likely following auditory presentation than following articulatory suppression. Partial matching theory is contrasted with therational response theory, according to which all FAs are unlucky guesses; partial matching theory gave a better account of the present experimental data than did rational response theory. However, a logical relationship between the two theories was suggested, a consequence of which was that rational response theory could be modified to include partial matching in such a way as to account for mirror effects, not only in unusually difficult immediate probed recognition tasks, but also in the more commonly studied mixed test list paradigm involving words of high or low frequency. 相似文献
198.
This paper reviews the published literature addressing forgiveness as a therapeutic issue. The review revealed four major themes. These included: diverse attempts in the literature to define forgiveness; the presentation of models of intervention; resistance among theoreticians and therapists to examine forgiveness as a therapeutic construct, and empirical evidence of forgiveness intervention applied to clinical settings. These theoretical and empirical publications are described and critiqued. An evaluation is made as to the current state of the research, and suggestions for future directions. 相似文献
199.
Terry A. Beehr Denise M. Weisbrodt Matthew J. Zagumny 《Journal of applied social psychology》1994,24(18):1665-1684
Satisfaction with subordinates, a relatively neglected facet of job satisfaction, was examined via questionnaires administered to both a sample of 37 retail store supervisors and a second sample of 58 bank supervisors regarding 274 of their subordinates. Functional relationships between supervisors and subordinates, in which subordinates help get things done in the workplace, were related to satisfaction with subordinates even after entity relationships (similarity between supervisors and subordinates on biodata and values) were controlled. 相似文献
200.
Katherine M. White Deborah J. Terry Michael A. Hogg 《Journal of applied social psychology》1994,24(24):2164-2192
A study was undertaken to assess the utility of revisions to the theories of reasoned action/planned behavior in the context of HIV-preventive behaviors. Revisions to the models incorporated the addition of group norm (behavioral norm and group attitude) to the nonnative component of the reasoned action model and the distinction among three aspects (self-efficacy, perceived behavioral control, and planning) of the control component of the theory of planned behavior. Respondents were 211 sexually experienced heterosexual undergraduates. The study employed a longitudinal design, with the proposed predictors of performing the behaviors under consideration (using a condom every time you have sexual intercourse during the next month and discussing whether to use a condom with any new partners during the next month) assessed prior to the measures of reported behavior. Consistent with expectations, group norm emerged as a distinctive predictor (in addition to attitude and subjective norm) of intentions to practice both safer sex behaviors. The data also revealed some support for the distinction among the different measures of control. The results of the study suggest that the normative component of the theories of reasoned action and planned behavior should be revised to incorporate more subtle influences of the referent group and that tests of theory of planned behavior should distinguish among the different aspects of behavioral control. 相似文献