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Procedural learning benefits from memory processes occurring outside practice resulting in offline learning. Offline gains have been demonstrated almost exclusively for the ordinal structure of sequential motor tasks. Many skills also demand that the correct serial order of events be appropriately timed. Evidence indicates that the temporal aspect of a procedural skill can be encoded independent of serial order knowledge and governed by at least two distinct neural circuits. The present experiment determined if (a) offline gains emerge for temporal learning, and (b) if such gains occur for timing supervised by distinct timing systems. Participants experienced 216 practice trials of a 7-key press sequence that involved integer- or non-integer timing rhythms. Twenty-four hours after training 30 test trials were administered. Results revealed robust offline enhancement for timing performance of the non-integer based temporal sequences. This improvement was localized to stabilization of the required relative but not absolute time profiles. The neural circuitry central to supporting the performance of non-integer timing sequences is also a principal constituent of what is described as the "cognitive" timing system. Timing governed by this system appears most susceptible to offline gains via consolidation. 相似文献
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Robust offline performance gains, beyond those that would be anticipated by being exposed to additional physical practice, have been reported during procedural learning and have been attributed to enhancement consolidation, a process by which memory is transformed in such a way that it is not only more resistant to forgetting but may also involve a reorganization of information that supports superior task execution. The authors assessed the impact of increasing within-session practice extent on the emergence of offline performance gains. Practice-dependent improvements occurred across 12 and 24 30-s practice trials of a 5-element motor sequencing task. Offline improvements were observed following both 12 and 24 trials. The improvement following 12 trials was associated with the formation of motor chunks important for establishing movement sequence structure. In contrast, the offline improvement after 24 trials was not related to further changes in movement structure beyond those that had emerged during practice. These data suggest that additional memory operations, beyond those needed to amalgamate subsequences of the SRT task, are susceptible to enhancement consolidation. 相似文献
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People perceive their life as meaningful when they find coherence in the environment. Given that meaning of life is tied to making sense of life events, people who lack meaning would be more threatened by stressful life events than those with a strong sense of meaning in life. Four studies demonstrated links between perceptions of life’s meaningfulness and perceived levels of stress. In Study 1, participants with lower levels of meaning in life reported greater stress than those who reported higher meaning in life. In Study 2 and Study 3, participants whose meaning in life had been threatened experienced greater stress than those whose meaning in life had been left intact. In Study 4, anticipation of future stress caused participants to rate themselves higher on the quest for meaning in life. These findings suggest that perceiving life as meaningful functions as a buffer against stressors. 相似文献
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Joyce Ehrlinger Jeni L. Burnette Jina Park Mycah L. Harrold Kasey Orvidas 《Journal of applied social psychology》2017,47(6):320-330
We examined whether a belief in weight as malleable (an incremental theory) leads to healthier eating than a belief that weight is fixed (an entity theory). Participants with incremental theories of weight consumed fewer calories from high‐calorie foods in a lab‐based taste‐test than did those with more entity theories of weight. This pattern held correlationally, with naturally occurring theories of weight (Study 1), and when we experimentally manipulated participants’ theories of weight (Study 2). A third study provided evidence that differences in self‐efficacy regarding food mediate the relationship between theories of weight and eating behavior (Study 3). One way to encourage healthy eating might be to develop interventions that encourage more incremental views of weight. 相似文献
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The present study examined life stage and cultural differences in the degree to which familiarity of one's physical location and interaction partner is associated with daily well-being. Participants reported all the activities they engaged in and how they felt during these activities on a previous day using the Day Reconstruction Method (Kahneman, Krueger, Schkade, Schwarz, & Stone, 2004). Both Korean and American retirees were happier when in a familiar place than in an unfamiliar place, whereas the reverse was true for both Korean and American working adults. In addition, we found cultural differences in the role of familiarity of the interaction partner. Specifically, Koreans (both retirees and working adults) were substantially happier when they interacted with a familiar person than when they interacted with an unfamiliar person. In contrast, Americans (both retirees and working adults) were no happier with a familiar person than with an unfamiliar person. 相似文献
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Rhee SH Willcutt EG Hartman CA Pennington BF DeFries JC 《Journal of abnormal child psychology》2008,36(1):29-40
There is significant comorbidity between attention-deficit/hyperactivity disorder (ADHD) and conduct disorder (CD). The conclusions
of studies that examined the causes of comorbidity between ADHD and CD conflict, with some researchers finding support for
the three independent disorders model and others finding support for the correlated risk factors model. We tested these models
and eleven alternative hypotheses using the same analytical approach. The participants were 110 monozygotic twin pairs and
181 dizygotic twin pairs recruited from the Colorado Learning Disabilities Research Center Twin Study. The three independent
disorders model did not fit the data, whereas the correlated risk factors model fit the data well. Several other comorbidity
models fit the data as well as or better than the correlated risk factors model. The results suggest that correlated risk
factors are a better explanation for the comorbidity between ADHD and CD than a third, independent ADHD+CD subtype. 相似文献
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Common Genetic and Environmental Influences on Major Depressive Disorder and Conduct Disorder 总被引:2,自引:1,他引:1
Subbarao A Rhee SH Young SE Ehringer MA Corley RP Hewitt JK 《Journal of abnormal child psychology》2008,36(3):433-444
The evidence for common genetic and environmental influences on conduct disorder (CD) and major depressive disorder (MDD) in adolescents was examined. A sample of 570 monozygotic twin pairs, 592 dizygotic twin pairs, and 426 non-twin siblings, aged 12-18 years, was recruited from the Colorado Twin Registry. For the past year data, there was a significant correlation between the genetic influences on MDD and CD and, for the lifetime data, there was a significant correlation between the genetic influences on MDD and CD, and a significant correlation between the nonshared environmental influences on MDD and CD. Our results suggest that some genetic factors will increase an individual's vulnerability to both MDD and CD in adolescence. 相似文献