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71.
Simultaneous reaching movements made with the two hands can show a considerable increase in reaction time (RT) when they differ in terms of direction or extent, compared to when the movements involve the same direction and extent. This cost has been attributed to cross-talk in the specification of the motor parameters for the two hands. However, a recent study [Diedrichsen, Hazeltine, Kennerley, & Ivry, (2001). Psychological Science, 12, 493-498] indicates that when reaching movements are cued by the onset of the target endpoint, no compatibility effects are observed. To determine why directly cued movements are immune from interference, we varied the stimulus onset asynchrony for the two movements and used different combinations of directly cued and symbolically cued movements. In two experiments, compatibility effects were only observed when both movements were symbolically cued. No difference was found between compatible and incompatible movements when both movements were directly cued or when one was directly cued and the other was symbolically cued. These results indicate that interference is not related to the specification of movement parameters but instead emerges from processes associated with response selection. Moreover, the data suggest that cross-talk, when present, primarily shortens the RT of the second movement on compatible trials rather than lengthening this RT on incompatible trials. 相似文献
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73.
In the present study we examined the influence of manipulating the animacy of the sentential subject on the size of the syntactic priming effect induced by violation of subject–predicate gender agreement in Hebrew. The agreement violation delayed naming incongruent compared with congruent predicates. This priming effect was stronger when the sentential subject was an animate than an inanimate noun. Additional experiments revealed that: (1) the interaction between the priming effect and animacy of the subject could not be explained on the basis of differences in the phonological transparency of the gender inflection in the two groups of nouns, and (2) it was sensitive to the ratio of animate/inanimate conditions in a block. We suggest that the interaction between the processing of agreement and the effect of animacy is influenced by a controlled process of verifying the coherence of a currently identified word within a built-up context. 相似文献
74.
Seven spatial tests from the CTY Spatial Test Battery and four subscales of an attribution scale were administered to 23 female and 28 male undergraduates. Three hypotheses were tested. The seven spatial tests and three of the attribution subscales were found reliable; sex differences were found for the spatial tests but not the attribution scales; and subjects' attributions did not predict spatial performance. 相似文献
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76.
The present research investigated whether automatic social-cognitive skills are based on the same representations and processes as their controlled counterparts. Using the cognitive task of negating valence, the authors demonstrate that enhanced practice in negating the valence of a stimulus can lead to changes in the underlying associative representation. However, procedural, rule-based components of negations were generally unaffected by practice (Experiments 1-3). Moreover, negations of evaluative stimuli did not influence automatic evaluative responses to these stimuli, unless the negation was included in the associative representation of a stimulus (Experiments 4-6). These results suggest that some practice-related skill improvements are limited to conditions in which a general procedure can be substituted by the retrieval of results of previous applications from associative memory. Implications for research on automaticity and social cognition are discussed. 相似文献
77.
We have developed a detection task in which subjects identify a pair of collinear edges in a field of polygons. Five of our six subjects showed significant, rapid learning at this task. Four showed evidence of retention a day and a week later. In several transfer tests, we found that disruption of the distractors produced a significant drop-off in performance. These results are consistent with a model in which collinear targets initially produce a salience signal too weak to be reliably detected over the noise of the distractors. As the experiment proceeds, the visual system learns to dampen the distractor signals, allowing for more reliable detection. 相似文献
78.
Eliot J 《Perceptual and motor skills》2002,94(2):479-486
Spatial intelligence is characterized in terms of a continuum of research perspectives which range from a physiological or sensory awareness to a complex thought and cultural emphasis. 相似文献
79.
Three studies examined how food deprivation influences the immediate valence of food stimuli as well as spontaneous motivational tendencies toward them. We assumed that immediate reactions towards food stimuli should be tuned to the basic needs of the organism. In Study 1, the immediate valence of food names as a function of need state was assessed using an Implicit Association Test (IAT) in a quasi‐experimental design. Food deprivation led to a more positive immediate valence of food items. In Study 2, these results were replicated using the Extrinsic Affective Simon Task. In Study 3, immediate motivational reactions toward pictorial food stimuli were assessed. As hypothesized, approach reactions were facilitated for participants tested before as compared to after lunch, even in a sample with eating disorders. We thus conclude that the immediate valence of edible objects partially reflects regulation in the service of need fulfillment. Copyright © 2006 John Wiley & Sons, Ltd. 相似文献
80.
Hazeltine E Aparicio P Weinstein A Ivry RB 《Journal of experimental psychology. Human perception and performance》2007,33(6):1451-1467
This study examined the representational nature of configural response learning using a task that required simultaneous keypresses with 2 or 3 fingers, similar to the production of chords on the piano. If the benefits of learning are related to the retrieval of individual stimulus-response mappings, performance should depend on the frequencies of the individual responses forming each chord. Alternatively, learning may involve the encoding of configural information concerning the relationship between the chord elements. In Experiment 1, training was restricted to a subset of the 120 possible 3-element chords. Probe blocks included the practiced chords, chords composed of novel configurations of practiced elements (reconfigured), and chords that contained a new element (new). Practiced chords were performed faster than reconfigured chords, indicating learning involves the encoding of configural information. Experiment 2 showed that learning was not restricted to configurations within each hand. Experiments 3 and 4 demonstrated that learning was largely response based. 相似文献