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H. Theresa Chang Rafael Klorman Sally E. Shaywitz Jack M. Fletcher Karen E. Marchione John M. Holahan Karla K. Stuebing Joan T. Brumaghim Bennett A. Shaywitz 《Journal of abnormal child psychology》1999,27(3):237-245
A paired-associate learning (PAL) test was administered to 22 community volunteers without disruptive disorders and 197 children (7.5–13.5 years-old) presenting with the inattentive and combined subtypes of attention-deficit/hyperactivity disorder (ADHD) either in combination with or without oppositional defiant disorder (ODD). Participants were screened for learning disorders. In comparison to non-ADHD participants, children with ADHD achieved worse PAL and made errors rated as more acoustically and less semantically similar to the correct paired associates. These deficits were not related to hyperactivity–impulsivity or comorbid ODD. These results suggest that ADHD children are less competent at PAL and use less efficient learning strategies than their non-ADHD peers. 相似文献
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In a previous word-pair encoding study (Dolan & Fletcher, 1997), we examined the effect of introducing novelty, either in studied words or in their mutual associations. A left medial temporal lobe (MTL) sensitivity to novel words and left prefrontal cortex (PFC) to novel associations was observed. In this further report on the data, we explored the extent to which the right PFC, more generally implicated in retrieval operations (Fletcher, Frith, & Rugg, 1997), was sensitive to these manipulations. Specifically, we characterised changes associated with increasing familiarity of study material. We demonstrate that the response in right ventrolateral PFC is preferentially sensitive to a condition in which all material was familiar (that is, in which all material had been presented prior to scanning). A more dorsal region in right PFC was found to be relatively more active in association with a condition in which one item in the pair was familiar but was paired with a novel associate. Our results suggest that sensitivity to stimulus familiarity is expressed in right PFC, even within the context of an encoding task. The data also provide further evidence for functional heterogeneity within right PFC, with a more ventral region responding to familiarity of complete word pairs and a more dorsal region responding to familiar single words occurring in the context of new associative relationships. 相似文献
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Fletcher JC 《The Journal of clinical ethics》1991,2(1):30-31
...Every hospital needs a policy statement devoted to confidentiality. This task is a good assignment for a hospital ethics committee. In drafting such a statement, one area that should not be overlooked is respect for confidentiality in cases used for teaching, patient conferences, and interdisciplinary meetings, including the teaching of clinical ethics! The University of Virginia's (UVA) Hospital Ethics Committee is considering a new policy statement on confidentiality.... 相似文献
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Clive Fletcher 《Counselling psychology quarterly》1991,4(2-3):103-107
The demand for assessment feedback counselling, and individual differences in feedback seeking, were investigated in a group of fifty managers who had been through a psychometric assessment procedure. Results suggest that there is a substantial demand for such feedback counselling and that those who seek it are, in some respects, more intellectually able and more interpersonally positive than those who do not. Some advice is offered on the handling of assessment feedback counselling sessions. 相似文献
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After learning to press keys in a predetermined serial position sequence, with timeouts scheduled as a consequence of errors, monkeys developed stereotyped errors. As soon as a new trial started, the animals would make an error. On trial after trial, they pressed the same incorrect key at the first member of the sequence, even though they had previously learned the sequence. First-member errors occurred even when sequences of fully bright keys marking correct choices were presented. When timeout was eliminated as a consequence of one first-member error, subjects switched to an error that did produce the timeout. When all first-member errors failed to produce timeout the monkeys ceased responding. Both prefeeding and reduction in reinforcement density resulted in stereotyped errors occurring earlier in the session. 相似文献