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961.
On the basis of a review of the literature and three new experiments, Fowler (2006) concludes that a contrast account for phonetic context effects is not tenable and is inferior to a gestural account. We believe that this conclusion is premature and that it is based on a restricted set of assumptions about a general perceptual account. Here, we briefly address the criticisms of Fowler (2006), with the intent of clarifying what a general auditory and learning approach to speech perception entails. 相似文献
962.
There is no consensus as to what information guides search for a singleton target. Does the most salient display element capture attention, regardless of the observer's attentional set? Do observers adopt a default salience-based search mode? Does knowledge of the target's defining featural property (when available) affect search? Finally, can intertrial contingencies account for the disparate results in the literature? We investigated search for a shape singleton when (1) the target and nontarget shapes switched unpredictably from trial to trial, (2) the target feature remained fixed, and (3) the target was a singleton on only one third of the trials. We examined overall reaction times, search slopes, errors, and the magnitude of the slowing caused by a cross-dimensional singleton distractor. Our results argue against the idea that search is guided solely by stimulus-driven factors or that subjects adopt a singleton detection mode that is blind to feature information. They show also that intertrial contingencies, although potent, cannot account for the variety of results in the literature. 相似文献
963.
Speculation about key factors affecting home advantage still exists. The present study investigated aggressive behavior amongst English Football Premiership (soccer) players and its relation to home advantage. The frequency of aggressive behaviour, identified by the award of a penalty or disciplinary card (yellow for caution or red for dismissal) was analysed over 2000-2003. Chi-square analyses assessed whether a greater frequency of aggressive behavior was performed by teams away from home. In decided matches, teams playing away received significantly more cautions (yellow cards) than home teams. A further analysis of tied matches indicated that away teams received significantly more cautions (yellow cards) than home teams. No significant differences between home and away teams were found for dismissals and penalties awarded. Reasons for these findings are considered. 相似文献
964.
This study examined the impact of various degenerative dementias on access to semantic knowledge and the status of semantic representations. Patients with semantic dementia, primary progressive aphasia, and Alzheimer's disease were compared with elderly controls on tasks of category and letter fluency, with number of words generated, mean lexical frequency and errors recorded. The findings are consistent with the view that category and letter fluency rely on both common and unique cognitive processes. Fluency tasks, with the richness of data obtained, are valuable in distinguishing different dementia syndromes from one another. 相似文献
965.
Mesoudi A Whiten A Laland KN 《The Behavioral and brain sciences》2006,29(4):329-47; discussion 347-83
We suggest that human culture exhibits key Darwinian evolutionary properties, and argue that the structure of a science of cultural evolution should share fundamental features with the structure of the science of biological evolution. This latter claim is tested by outlining the methods and approaches employed by the principal subdisciplines of evolutionary biology and assessing whether there is an existing or potential corresponding approach to the study of cultural evolution. Existing approaches within anthropology and archaeology demonstrate a good match with the macroevolutionary methods of systematics, paleobiology, and biogeography, whereas mathematical models derived from population genetics have been successfully developed to study cultural microevolution. Much potential exists for experimental simulations and field studies of cultural microevolution, where there are opportunities to borrow further methods and hypotheses from biology. Potential also exists for the cultural equivalent of molecular genetics in "social cognitive neuroscience," although many fundamental issues have yet to be resolved. It is argued that studying culture within a unifying evolutionary framework has the potential to integrate a number of separate disciplines within the social sciences. 相似文献
966.
This research put Gable's (in press) hierarchical model of approach-avoidance social motivation to empirical test using newly developed measures of friendship-approach and avoidance goals. The results from Study 1 supported the psychometric soundness of the new goal measures and showed the anticipated differential predictive patterns for the two goals. The results from Study 2 provided further evidence of the psychometric soundness of the new goal measures and provided support for the full hierarchical model in longitudinal analyses of subjective well-being and physical symptomotology. Implications of the present research for understanding motivation both within and beyond the social domain are discussed. 相似文献
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Research has shown that animal subjects that are given a chance to consume a low-valued substance will consume less of it if a high-valued substance will soon be available than they would if the low-valued substance were to remain available (negative consummatory contrast). Research has also shown that subjects that lever press for a low-valued reinforcer will press the lever more often for that reinforcer if they will soon be able to lever press for a high-valued reinforcer than they would if they continue to press for the low-valued reinforcer (positive induction). The present study investigated these different changes in behavior across 3 experiments. The results suggest that the occurrence of contrast or induction does not depend on the type of substances that are used. We argue that further investigation of the contrast vs. induction issue is warranted because it has empirical, theoretical, and applied implications. 相似文献