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A series of 7 experiments used dual-task methodology to investigate the role of working memory in the operation of a simple action-control plan or program involving regular switching between addition and subtraction. Lists requiring switching were slower than blocked lists and showed 2 concurrent task effects. Demanding executive tasks impaired performance on both blocked and switched lists, whereas articulatory suppression impaired principally the switched condition. Implications for models of task switching and working memory and for the Vygotskian concept of verbal control of action are discussed. 相似文献
83.
Satoru Saito Alan D. Baddeley 《The Quarterly Journal of Experimental Psychology Section A: Human Experimental Psychology》2004,57(7):1309-1340
To explore the relationship between short-term memory and speech production, we developed a speech error induction technique. The technique, which was adapted from a Japanese word game, exposed participants to an auditory distractor word immediately before the utterance of a target word. In Experiment 1, the distractor words that were phonologically similar to the target word led to a greater number of errors in speaking the target than did the dissimilar distractor words. Furthermore, the speech error scores were significantly correlated with memory span scores. In Experiment 2, memory span scores were again correlated with the rate of the speech errors that were induced from the task-irrelevant speech sounds. Experiment 3 showed a strong irrelevant-sound effect in the serial recall of nonwords. The magnitude of the irrelevant-sound effects was not affected by phonological similarity between the to-be-remembered nonwords and the irrelevant-sound materials. Analysis of recall errors in Experiment 3 also suggested that there were no essential differences in recall error patterns between the dissimilar and similar irrelevant-sound conditions. Weproposed two different underlying mechanisms in immediate memory, one operating via the phonological short-term memory store and the other via the processes underpinning speech production. 相似文献
84.
A binomial test for hierarchical dependency is presented. The null hypothesis is that all members of a population who possess a certain skill are a subset of the members who possess another skill. This hypothesis is basic to the writings of several prominent theorists, such as Gagné and Piaget. The model, assumptions, formula derivations, and procedures for the test are explained. An illustrative example is also provided. 相似文献
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For 30 days, three Ss searched for 1, 5, or 10 targets (N), any one of which had to occur once (as in past research). twice, or four times (FREQ). The N=1 and N=5 items were subsets of N=10 items. When FREQ=1. Ss searched longer for 5 targets than for 1 or 10 targets. This nonintuitive result was due to (a) Ss searching for all 10 targets even at N=5, and (b) the reported “pop-out effect” of the 5 target items as well as the other 5 items in the N=10 set. When FREQ > 1, Ss could search for only 2-3 targets at once, because they could not keep mental counters on more items. The presence of a complex background merely added a constant to search time. The main change in eye movements, with 30 days practice, was to reduce greatly the number of eye fixations, thus suggesting an increase in the useful fidld of view and/or a change in search strategy. A speculative model, based upon two comparison processes, was suggested to explain the results. 相似文献
89.
Three-quarter views of faces promote better recognition memory for previously unfamiliar faces than do full-face views. This paper reports experiments which examine the possible basis of the effect, and, in particular, examine whether the effect reflects some ‘canonical’ role for the 3/4 view of a face. Experiment 1 showed no advantage of 3/4 views over full-face views when the task was to decide whether or not each of a series of faces was that of a highly familiar colleague. In Experiment 2 a sequential matching task was used, where subjects had to respond positively if both members of a pair of faces were of the same person. When the faces used were highly familiar to the subjects, there was no evidence of an advantage for a 3/4 view in the matching task. Three-quarter views and full-face views led to equivalent performance, though profiles produced decrements in performance. When the same faces were shown to subjects who were unfamiliar with the faces, 3/4 views did lead to increased speeds in same trials, compared with full-face, though profiles again proved difficult. Thus a 3/4 view advantage appeared only where the faces were unfamiliar, and the task had to be performed at the level of visual matching. It appears that the 3/4 view advantage may be obtained only when the task involves explicit matching between test views and remembered target photographs, rather than reflecting any more fundamental properties of the representations used to recognize highly familiar faces. 相似文献
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Daniel R. McLeod Roland R. Griffiths George E. Bigelow John Yingling 《Behavior research methods》1982,14(5):463-466
An automated version of the Digit Symbol Substitution Test is described that employs a relatively inexpensive, commercially available microcomputer to present and score the task. Advantages of the automated DSST include: (1) objective scoring of both speed and accuracy of test performance, (2) printed copies of test scores, (3) convenient administration under standardized test conditions, and (4) the capacity for repeated assessment of an individual’s performance over time. Task performance data for individual subjects following doses of pentobarbital are presented; these data illustrate both the stability of task performance under constant conditions and the within-subjects sensitivity of task performance to experimental manipulations. 相似文献