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141.
In striking contrast to adults, in children sleep following training a motor task did not induce the expected (offline) gain in motor skill performance in previous studies. Children normally perform at distinctly lower levels than adults. Moreover, evidence in adults suggests that sleep dependent offline gains in skill essentially depend on the pre-sleep level of performance. Against this background, we asked whether improving children's performance on a motor sequence learning task by extended training to levels approaching those of adults would enable sleep-associated gains in motor skill in this age group also. Children (4-6 years) and adults (18-35 years) performed on the motor sequence learning task (button-box task) before and after ~2-hour retention intervals including either sleep (midday nap) or wakefulness. Whereas one group of children and adults, respectively, received the standard amount of 10 blocks of training before retention intervals of sleep or wakefulness, a further group of children received an extended training on 30 blocks (distributed across 3 days). A further group of adults received a restricted training on only two blocks before the retention intervals. Children after standard training reached lowest performance levels, whereas in adults performance after standard training was highest. Children with extended training and adults after reduced training reached intermediate performance levels. Only at these intermediate performance levels did sleep induce significant gains in motor sequence skill, whereas performance did not benefit from sleep in the low-performing children or in the high-performing adults. Spindle counts in the post-training nap were correlated with performance gains at retrieval only in the adults benefitting from sleep. We conclude that, across age groups, sleep induces the most robust gain in motor skill at an intermediate pre-sleep performance level. In low-performing children sleep-dependent improvements in skill may be revealed only after enhancing the pre-sleep performance level by extended training. 相似文献
142.
Visual recognition-memory span, name-face association, and verbal memory with selective reminding were tested in two groups of 24 normal healthy volunteers (above and below age 50 yr.). The preliminary study suggests differential effects of aging on specific memory components and warrants careful exploration. 相似文献
143.
Journal of Psycholinguistic Research - An amendment to this paper has been published and can be accessed via the original article. 相似文献
144.
C A De Mojà 《Psychological reports》1988,62(2):677-678
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Psychological Research - The reversal logical recoding rule (i.e., “respond opposite”) induced by an incompatible task (e.g., a task requiring to respond to red or green stimuli by... 相似文献