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61.
记忆系统中图形不同特征的提取 总被引:3,自引:1,他引:2
在长时记忆中,图形的颜色、形状和质地等三个特征可以分开表征。那么,图形的不同特征以何种方式提取?在提取过程中,图形的这些特征被激活的程度是否存在着差异?本研究通过对不同提取线索再认成绩的比较,试图对上述问题进行了探讨。结果表明,长时记忆中,图形的形状、颜色和质地的相对痕迹问无差异,而绝对痕迹不同,形状最强,颜色最弱,质地居中。当然,当图形特征数量增加时,它们之问的相互作用是不可避免的,所以,进一步的研究还应考虑到不同特征组合的提取特点,图形的其他特征(如大小、位置等)的提取特点。 相似文献
62.
Responding of pigeons under variable-interval schedules of unsignaled, briefly signaled, and completely signaled delays to reinforcement 总被引:4,自引:4,他引:0
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In Experiment 1, three pigeons' key pecking was maintained under a variable-interval 60-s schedule of food reinforcement. A 1-s unsignaled nonresetting delay to reinforcement was then added. Rates decreased and stabilized at values below those observed under immediate-reinforcement conditions. A brief stimulus change (key lit red for 0.5 s) was then arranged to follow immediately the peck that began the delay. Response rates quickly returned to baseline levels. Subsequently, rates near baseline levels were maintained with briefly signaled delays of 3 and 9 s. When a 27-s briefly signaled delay was instituted, response rates decreased to low levels. In Experiment 2, four pigeons' responding was first maintained under a multiple variable-interval 60-s (green key) variable-interval 60-s (red key) schedule. Response rates in both components fell to low levels when a 3-s unsignaled delay was added. In the first component delays were then briefly signaled in the same manner as Experiment 1, and in the second component they were signaled with a change in key color that remained until food was delivered. Response rates increased to near baseline levels in both components, and remained near baseline when the delays in both components were lengthened to 9 s. When delays were lengthened to 27 s, response rates fell to low levels in the briefly signaled delay component for three of four pigeons while remaining at or near baseline in the completely signaled delay component. In Experiment 3, low response rates under a 9-s unsignaled delay to reinforcement (tandem variable-interval 60 s fixed-time 9 s) increased when the delay was briefly signaled. The role of the brief stimulus as conditioned reinforcement may be a function of its temporal relation to food, and thus may be related to the eliciting function of the stimulus. 相似文献
63.
Trace autoshaping: Acquisition, maintenance, and path dependence at long trace intervals 总被引:1,自引:1,他引:0
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The pigeon's tendency to acquire and maintain signal-directed key pecking under a trace conditioning procedure was parametrically examined. In Experiment 1, the percentage of CS trials with a key peck response was a decreasing function of the trace interval for separate groups of pigeons. The majority of subjects acquired signal-directed key pecking with trace intervals as long as 36 sec. In Experiment 2, differential maintenance of key pecking occurred across trace intervals in a within-subject procedure. Maintenance of key pecking at 36- and 60-sec trace intervals was path dependent in that responding depended on the subject's performance under the preceding trace interval. 相似文献
64.
Herbert Hoijtink 《Psychometrika》1990,55(4):641-656
The PARELLA model is a probabilistic parallelogram model that can be used for the measurement of latent attitudes or latent preferences. The data analyzed are the dichotomous responses of persons to stimuli, with a one (zero) indicating agreement (disagreement) with the content of the stimulus. The model provides a unidimensional representation of persons and items. The response probabilities are a function of the distance between person and stimulus: the smaller the distance, the larger the probability that a person will agree with the content of the stimulus. An estimation procedure based on expectation maximization and marginal maximum likelihood is developed and the quality of the resulting parameter estimates evaluated.I gratefully acknowledge Ivo Molenaar and Wijbrandt van Schuur for their advice and encouragement during the course of the investigation, Derk-Jan Kiewiet who constructed the program for the ML estimator for the person parameter and Anne Boomsma, Wendy Post, Tom Snijders, and David Thissen for their comments on smaller aspects of the investigation. 相似文献
65.
This paper explores the post-war memoryscapes in Bosnia-Herzegovina via (defaced and destroyed) monuments evidencing the habitual struggle to disrupt and reorder space, and reinterpret the traumatic past. Analysing a combination of digital and fieldwork data, I make a case for interpreting attacks on monuments as a civilian retaliatory agency, exerting spatial hegemony and substantiating resentful affective regimes (especially in relation to the most recently imposed legal ban on the denial of genocide in Srebrenica). In doing so, I consider how citizens’ “truths” are enacted by distorting loss and violence, while collective trauma persists. This paper further illustrates how peculiar remembrance practices modify the standard purpose and meanings of a monument, contextualizing monuments within a larger framework of post-conflict spaces. 相似文献
66.
Delay of gratification captures elements of temptation and self‐denial that characterize real‐life problems with money and other problem behaviors such as unhealthy risk taking. According to fuzzy‐trace theory, decision makers mentally represent social values such as delay of gratification in a coarse but meaningful form of memory called “gist.” Applying this theory, we developed a gist measure of delay of gratification that does not involve quantitative trade‐offs (as delay discounting does) and hypothesize that this construct explains unique variance beyond sensation seeking and inhibition in accounting for problem behaviors. Across four studies, we examine this Delay‐of‐gratification Gist Scale by using principal components analyses and evaluating convergent and divergent validity with other potentially related scales such as Future Orientation, Propensity to Plan, Time Perspectives Inventory, Spendthrift‐Tightwad, Sensation Seeking, Cognitive Reflection, Barratt Impulsiveness, and the Monetary Choice Questionnaire (delay discounting). The new 12‐item measure captured a single dimension of delay of gratification, correlated as predicted with other scales, but accounted for unique variance in predicting such outcomes as overdrawing bank accounts, substance abuse, and overall subjective well‐being. Results support a theoretical distinction between reward‐related approach motivation, including sensation seeking, and inhibitory faculties, including cognitive reflection. However, individuals' agreement with the qualitative gist of delay of gratification, as expressed in many cultural traditions, could not be reduced to such dualist distinctions nor to quantitative conceptions of delay discounting, shedding light on mechanisms of self‐control and risk taking. Copyright © 2016 John Wiley & Sons, Ltd. 相似文献
67.
Felipe De Brigard Eleanor Hanna Peggy L. St Jacques Daniel L. Schacter 《Cognition & emotion》2019,33(4):646-659
Episodic counterfactual thoughts (CFT) and autobiographical memories (AM) involve the reactivation and recombination of episodic memory components into mental simulations. Upon reactivation, memories become labile and prone to modification. Thus, reactivating AM in the context of mentally generating CFT may provide an opportunity for editing processes to modify the content of the original memory. To examine this idea, this paper reports the results of two studies that investigated the effect of reactivating negative and positive AM in the context of either imagining a better (i.e. upward CFT) or a worse (i.e. downward CFT) alternative to an experienced event, as opposed to attentively retrieving the memory without mental modification (i.e. remembering) or no reactivation. Our results suggest that attentive remembering was the best strategy to both reduce the negative affect associated with negative AM, and to prevent the decay of positive affect associated with positive AM. In addition, reactivating positive, but not negative, AM with or without CFT modification reduces the perceived arousal of the original memory over time. Finally, reactivating negative AM in a downward CFT or an attentive remembering condition increases the perceived detail of the original memory over time. 相似文献
68.
The present study examines whether children reactivate a moved constituent at its gap position and how children’s more limited
working memory span affects the way they process filler-gap dependencies. 46 5–7 year-old children and 54 adult controls participated
in a cross-modal picture priming experiment and underwent a standardized working memory test. The results revealed a statistically
significant interaction between the participants’ working memory span and antecedent reactivation: High-span children (n = 19) and high-span adults (n = 22) showed evidence of antecedent priming at the gap site, while for low-span children and adults, there was no such effect.
The antecedent priming effect in the high-span participants indicates that in both children and adults, dislocated arguments
access their antecedents at gap positions. The absence of an antecedent reactivation effect in the low-span participants could
mean that these participants required more time to integrate the dislocated constituent and reactivated the filler later during
the sentence. 相似文献
69.
The effects of embedding standard Deese/Roediger-McDermott (DRM) lists into stories whose context biased interpretation either toward or away from the overall themes of the DRM lists on both true and false recognition were investigated with 7- and 11-year-olds. These biased story contexts were compared with the same children’s susceptibility to false memory illusions using the standard DRM list presentation paradigm. The results showed the usual age effects for true and false memories in the standard DRM list paradigm, where 11-year-olds exhibited higher rates of both true and false recognition compared with the 7-year-olds. Importantly, when DRM lists were embedded in stories, these age effects disappeared for true recognition. For false recognition, although developmental differences were attenuated, older children were still more susceptible to false memory illusions than younger children. These findings are discussed in terms of current theories of children’s false memories as well as the role of themes and elaboration in children’s memory development. 相似文献
70.
Christophe Bouton 《International Journal of Philosophical Studies》2020,28(3):370-389
ABSTRACT One of the starting points of Derrida’s deconstruction is the idea that metaphysics is dominated by an ontological primacy of the present. It is well known that Derrida took up this thesis of the ‘privilege of the present’ in metaphysics from Heidegger. However, this thesis is mentioned without being developed by Heidegger. What is the meaning of this ontological position? How did it originate? Should we try to go beyond it? And if so, how? In this paper, I would like to start out from Heidegger’s view that the understanding of Being, in the metaphysical tradition, is dominated by the ontological primacy of the present: according to this approach, which goes back to Aristotle’s theory of substance (ousia), Being means constant presence; only that which is constantly present really exists. I will then show that Heidegger himself, in his conception of the past, has renewed the privilege of the present, favoring the ‘having been’ (Gewesenheit) over the past as ‘by-gone-ness’ (Vergangenheit). Finally, I will show how Derrida’s concept of trace may help us to go beyond the privilege of the present. 相似文献