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The effects of ad libitum access to a pacifier on the behavioral state and motor activity of preterm infants have been compared with those observed in full-term neonates. Regardless of maturity, nonnutritive sucking (NNS) decreases the amount of time spent in active states and increases that spent in quiescent states, lengthens the longest state bout, and decreases the frequency of state transitions. NNS also reduces overall motor activity as well as that during Active Sleep. Provided such ad libitum sucking opportunity, preterm infants thus appear to derive no less benefit from NNS than do term neonates. This result contrasts with an earlier finding that preterms are less soothed by NNA than are term infants. 相似文献
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OBJECTIVE: The current study examined sleep disturbance (i.e., sleep duration, sleep quality) as a correlate of stress reactivity and pain reactivity. DESIGN AND OUTCOME MEASURES: An ecological momentary assessment design was used to evaluate the psychosocial functioning of men and women with fibromyalgia or rheumatoid arthritis (N=49). Participants recorded numeric ratings of pain, the occurrence of a stressful event, as well as positive and negative affect 7 times throughout the day for 2 consecutive days. In addition, participants reported on their sleep duration and sleep quality each morning. RESULTS: Sleep disruption was not found to be an independent predictor of affect. However, sleep was found to buffer the relationship between stress and negative affect and the relationship between pain and both positive and negative affect. CONCLUSION: These results are consistent with a model in which good-quality sleep acts as a biobehavioral resource that minimizes allostatic load. 相似文献
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Mário B. Ferreira Leonel Garcia-Marques David Hamilton Tânia Ramos James S. Uleman Rita Jerónimo 《Journal of experimental social psychology》2012,48(1):1-12
More than twenty five years after the beginning of research on spontaneous trait inferences (Winter & Uleman, 1984) an intriguing paradox in the impression formation literature remains: if traits are spontaneously inferred, why aren't they used to organize behavioral information and thereby facilitate recall under memory instructions (Hamilton, Katz, & Leirer, 1980)? We hypothesized that organization by traits is more evident under impression formation goals because only in that case then are inferences sufficiently monitored to permit their use in organizing impressions. As a consequence, such monitored traits can then be used strategically as retrieval cues. Merging the main features of the Winter and Uleman and the Hamilton et al. experimental paradigms, Experiment 1 simultaneously replicated the main results of both studies. Using a new recognition paradigm, Experiments 2 and 3 further tested this inference monitoring hypothesis by showing that monitoring of trait inferences only occurs under particular processing goals, and is dependent on the availability of cognitive resources. 相似文献