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This research aimed to investigate the time course effect of a moderate steady-state exercise session on response execution and response inhibition using a stop-task paradigm. Ten participants performed a stop-signal task whilst cycling at a carefully controlled workload intensity (40% of maximal aerobic power), immediately following exercise and 30 min after exercise cessation. Results showed that moderate exercise enhances a subjects’ ability to execute responses under time pressure (shorter Go reaction time, RT without a change in accuracy) but also enhances a subjects’ ability to withhold ongoing motor responses (shorter stop-signal RT). The present outcomes reveal that the beneficial effect of exercise is neither limited to motor response tasks, nor to cognitive tasks performed during exercise. Beneficial effects of exercise remain present on both response execution and response inhibition performance for up to 52 min after exercise cessation. 相似文献
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Richard Joyce 《Ethical Theory and Moral Practice》2009,12(1):53-75
Different versions of moral projectivism are delineated: minimal, metaphysical, nihilistic, and noncognitivist. Minimal projectivism (the focus of this paper) is the conjunction of two subtheses: (1) that we experience morality as an objective aspect of the world and (2) that this experience has its origin in an affective attitude (e.g., an emotion) rather than in perceptual faculties. Both are empirical claims and must be tested as such. This paper does not offer ideas on any specific test procedures, but rather undertakes the important preliminary task of clarifying the content of these subtheses (e.g., what is meant by “objective”? what is meant by “experience”?). Finally, attention is given to the relation between (a) acknowledging that the projectivist account might be true of a token moral judgment and (b) maintaining moral projectivism to be true as a general thesis. 相似文献
186.
James M. Joyce 《Synthese》2007,156(3):537-562
Richard Jeffrey long held that decision theory should be formulated without recourse to explicitly causal notions. Newcomb
problems stand out as putative counterexamples to this ‘evidential’ decision theory. Jeffrey initially sought to defuse Newcomb
problems via recourse to the doctrine of ratificationism, but later came to see this as problematic. We will see that Jeffrey’s
worries about ratificationism were not compelling, but that valid ratificationist arguments implicitly presuppose causal decision
theory. In later work, Jeffrey argued that Newcomb problems are not decisions at all because agents who face them possess
so much evidence about correlations between their actions and states of the world that they are unable to regard their deliberate
choices as causes of outcomes, and so cannot see themselves as making free choices. Jeffrey’s reasoning goes wrong because
it fails to recognize that an agent’s beliefs about her immediately available acts are so closely tied to the immediate causes
of these actions that she can create evidence that outweighs any antecedent correlations between acts and states. Once we
recognize that deliberating agents are free to believe what they want about their own actions, it will be clear that Newcomb
problems are indeed counterexamples to evidential decision theory. 相似文献
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Friedman WJ 《Memory & cognition》2007,35(1):66-72
Order codes are one of the three main types of information that have been hypothesized to underlie memory for the times of life events. Published evidence for the theory, however, has come exclusively from research in which brief retention intervals have been used. In the first of two studies, 101 adults judged the order of pairs of movies released 5-14 years ago, half of which shared a common major actor. There was no evidence that related films could be ordered more accurately than unrelated ones. In the second study, 88 students were presented with in-class announcements that were either related or unrelated to an earlier announcement. Three weeks later,they judged the order of the pairs of announcements. There was no difference between the accuracy for the related and the unrelated pairs. The findings do not support the proposal that the automatic creation of order information at the time of encoding contributes to autobiographical memory. 相似文献
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Margaret Rosario Joyce Hunter Shira Maguen Marya Gwadz Raymond Smith 《American journal of community psychology》2001,29(1):133-160
A model is proposed and explored that links the coming-out process to the psychological functioning (i.e., self-esteem and distress) and sexual behaviors of gay, lesbian, and bisexual youths recruited from gay-focused community-based and college organizations in New York City. The coming-out process is multidimensional, consisting, as defined here, of involvement in gay/lesbian activities, attitudes toward homosexuality, comfort with homosexuality, self-disclosure of sexual identity to others, and sexual identity. The coming-out dimensions were related to self-esteem, distress, and unprotected sexual behaviors. In addition, the relations between the coming-out dimensions and unprotected sexual behaviors were explained by psychological functioning. In particular, limited involvement in gay/lesbian activities was associated with more unprotected sex. Negative attitudes toward homosexuality were related directly to more unprotected sex, and they were related indirectly to more unprotected sex by means of increasing emotional distress. These and other findings have implications for designing preventive interventions to increase the youths' psychological functioning and reduce their unprotected sexual behaviors. 相似文献
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