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61.
Prominent roles for general attention resources are posited in many models of working memory, but the manner in which these can be allocated differs between models or is not sufficiently specified. We varied the payoffs for correct responses in two temporally-overlapping recognition tasks, a visual array comparison task and a tone sequence comparison task. In the critical conditions, an increase in reward for one task corresponded to a decrease in reward for the concurrent task, but memory load remained constant. Our results show patterns of interference consistent with a trade-off between the tasks, suggesting that a shared resource can be flexibly divided, rather than only fully allotted to either of the tasks. Our findings support a role for a domain-general resource in models of working memory, and furthermore suggest that this resource is flexibly divisible. 相似文献
62.
Cowan N Elliott EM Saults JS Nugent LD Bomb P Hismjatullina A 《Psychological science》2006,17(1):67-73
Researchers have suggested that developmental improvements in immediate recall stem from increases in the speed of mental processes. However, that inference has depended on evidence from correlation, regression, and structural equation modeling. We provide counter-examples in two experiments in which the speed of spoken recall was manipulated. In one experiment, second-grade children and adults recalled lists of digits more quickly than usual when the lists were presented at a rapid rate of two items per second. In a second experiment, children received lists at a rate of one item per second; half the children were trained (successfully) to speak their responses more quickly than usual, at a rate similar to adults' usual rate. Recall accuracy was completely unaffected by either of these response-speed manipulations. Thus, although response rate is a strong marker of an individual's maturational level, it does not appear to determine the accuracy of immediate recall. These results have important methodological and theoretical implications for human development. 相似文献
63.
Capacity limits in short-term recall were investigated using proactive interference (PI) from previous lists in a speeded-recognition task. PI was taken to indicate that the target list length surpassed working memory capacity. Unlike previous studies, words were presented either concurrently or sequentially and a new method was introduced to increase the amount of PI. On average, participants retrieved about four items without PI. We suggest an activation-based account of capacity limits. 相似文献
64.
We assessed a hypothesis that working memory capacity should include a constant number of separate mental units, or chunks (cf. Miller, 1956). Because of the practical difficulty of measuring chunks, this hypothesis has not been tested previously, despite wide attention to Miller's article. We used a training procedure to manipulate the strength of associations between pairs of words to be included in an immediate serial-recall task. Although the amount of training on associations clearly increased the availability of two-item chunks and therefore the number of items correct in list recall, the number of total chunks recalled (singletons plus two-word chunks) appeared to remain approximately constant across association strengths, supporting a hypothesis of constant capacity. 相似文献
65.
Abstract— Recent research questions the existence of a short-term storage mechanism capable of holding limited information temporarily Specifically, serial-recall results with a through-list distractor (TLD) procedure, in which a distracting task is interposed between list Items as well as between the list and recall period, generally resemble the results of immediate-recall procedures The present study, however, reconfirms the utility of short-term storage by demonstrating an important difference between immediate and TLD recall A word-length effect, or advantage for lists of shorter words (which minimize short-term forgetting during spoken recall), did not occur with a TLD procedure. 相似文献
66.
Thaddeus M Cowan 《Journal of mathematical psychology》1977,16(3):254-260
Impossible figures and their braid analyses are reconsidered from the point of view of their side segments rather than their corners. 相似文献
67.
N Cowan 《Acta psychologica》1991,77(2):121-135
First and second language acquisition both require that speech be segmented into familiar, multiphonemic units (e.g., words and common phrases). The present research examines one segmentation cue that is of considerable theoretical interest: the repetition of fixed sequences of speech. On each trial, subjects heard repetitions ('pre-exposures') of two artificially-constructed, multisyllabic patterns that shared an embedded segment 1 or 2 syllables long (e.g., 2 shared syllables: [ga-li-SE] and [li-SE-stu]). There were 2 and 6, 4 and 4, or 6 and 2 repetitions of the two patterns, randomly ordered. Subjects were then to indicate the groupings they perceived within a subsequent, longer sequence containing both of the pre-exposed patterns (e.g., [ga-li-SE-stu]). Responses varied systematically with the size of the embedded segment, the repetition frequencies of the two pre-exposed patterns, and the serial position of each pre-exposure. The results illustrate how investigations of the processing of speech patterns may contribute to an understanding of some elementary aspects of language learning. 相似文献
68.
Sue Cowan 《Journal of community & applied social psychology》1999,9(4):289-307
This paper demonstrates a novel approach to investigating the problem of public opposition to community mental health facilities. With the move towards community care, organizations setting up mental health facilities have encountered public opposition. It has been argued that this is due, in part, to the attitudes held by the public towards mentally ill people. A knowledge and understanding of attitudes towards this client group therefore has the potential to be of practical use to policy makers and practitioners who have a responsibility to consult on, and implement, community care for mentally ill people. The survey approaches and hypothetical situations used in previous British studies of community attitudes towards mentally ill people have, however, failed to take account of the rhetorical richness and complexity of the attitudes likely to be expressed in real‐life community care contexts. By contrast, the study reported in this paper used a discourse analytic approach to explore the views expressed about mentally ill people in a ‘hot situation’. Specifically, people's views were explored in the contexts of the arguments they used to challenge or advocate a supported accommodation project for mentally ill people in their community. This paper examines some of these arguments and discusses the theoretical implications for traditional approaches to attitude research. In conclusion, the potential practical utility of the findings is considered. Copyright © 1999 John Wiley & Sons, Ltd. 相似文献
69.
The exceptionality of the skills of calendrical savants and the role of practice were investigated. Experiment 1 compared four autistic calendrical savants to Professor Conway, a distinguished mathematician with calendrical skills. Professor Conway answered questions over a greater range of years but some savants knew more calendrical regularities. Experiment 2 studied the development of a calendrical savant's ability to answer date questions for very remote future years. He started by making written calculations and progressed to mental calculation. His variation in response time for remote dates was similar to that for near dates. The findings are consistent with the view that calendrical savants develop their skills through practice. 相似文献
70.
Attachment security in couple relationships: a systemic model and its implications for family dynamics 总被引:3,自引:0,他引:3
Theory and research on adult attachment style emphasize the crucial role that the sense of attachment security plays in the formation and maintenance of couple relationships. In the present article, we review studies that have examined the contribution of adult attachment style to relational cognitions, emotions, and behaviors as well as to the formation, quality, and stability of dating and marital relationships. We discuss some of the measurement and design issues raised by this research. Based on the reviewed findings, we provide an integrative, systemic theoretical model delineating how the links between partners' attachment security and the quality of their couple relationship occurs. Finally, we discuss the implications of this model for the understanding of how attachment style and couple relationships combine to affect the family system in general, and parent-child relationships and children's developmental outcomes, in particular. 相似文献