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201.
Using the shortening reflex of the medicinal leech Hirudo medicinalis we examined stimulus generalization of habituation learning. Preparations received mechanosensory stimulus at two positions on the leech body wall, one site used to carry out habituation training and a second novel site to test for generalization of habituation. After training, the specific mechanosensory neurons activated by each stimulus were assessed using intracellular recordings. As expected, the closer the two sites were to each other, the greater the degree of generalization of habituation at the novel site and the more sensory cells were shared. However, a form of behavioral facilitation was observed at the trained site that resembled behavioral sensitization, but differed from the standard sensitization process in several respects. (1) Facilitation was induced by stimulation of the novel site before habituation training at the trained site, although the stimulus intensity at the novel site was equivalent to the training stimuli and was not the strong, noxious stimuli that normally induce sensitization. (2) The magnitude of the facilitating effect was proportional to the proximity of the novel and trained stimulation sites. (3) Although behavior at the trained site was facilitated, behavior at the novel site was habituated, indicating that the induced behavioral facilitation did not generalize throughout the animal, as normally occurs during sensitization, but was limited to a single stimulus–response pathway. 相似文献
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Guillaume Chauvel François Maquestiaux Elise Gemonet Alan Hartley André Didierjean Rich Masters 《Journal of motor behavior》2018,50(3):268-274
Can Alzheimer's disease (AD) patients efficiently learn to perform a complex motor skill when relying on procedural knowledge? To address this question, the authors compared the golf-putting performance of AD patients, older adults, and younger adults in 2 different learning situations: one that promotes high error rates (thus increasing the reliance on declarative knowledge) or one that promotes low error rates (thus increasing the reliance on procedural knowledge). Motor performance was poorer overall for AD patients and older adults relative to younger adults in the high-error condition but equivalent between similar groups in the low-error condition. Also, AD patients in the low-error condition had better performance at the final putting distance relative to those in the high-error condition. This performance facilitation for AD patients likely stems from intact procedural knowledge. 相似文献
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A THERAPEUTIC PLAYGROUP FOR DEPRESSED MOTHERS AND THEIR INFANTS: FEASIBILITY STUDY AND PILOT RANDOMIZED TRIAL OF COMMUNITY HUGS
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Jennifer Ericksen Elizabeth Loughlin Charlene Holt Natalie Rose Eliza Hartley Melissa Buultjens Alan W. Gemmill Jeannette Milgrom 《Infant mental health journal》2018,39(4):396-409
Symptoms of depression negatively impact on mother?infant relationships and child outcomes. We evaluated a novel, 10‐session mother?infant therapeutic playgroup—Community HUGS (CHUGS)—which combines cognitive and experiential components through psychoeducation, play, music, and movement. Participants were mothers experiencing a range of postnatal mental health difficulties, including depression, with infants ≤12 months of age. However, the aim was not to treat maternal depression but to ameliorate associated problems in the mother?infant interaction. In the feasibility study, all participants received CHUGS. In the pilot randomized controlled trial (RCT), participants were randomized between intervention and a wait‐list. Outcomes were the Parenting Stress Index (PSI; R.R. Abidin, 1995), Parenting Sense of Competency Scale (Self‐Efficacy subscale; J. Gibaud‐Wallston & L.P. Wandersman, 1978), and the Depression, Anxiety, Stress Scales (P.F. Lovibond & S.H. Lovibond, 1995). In the feasibility study (n = 74), PSI scores dropped on all subscales, all ps < .01. Depression, p < .001, anxiety, p = .01, stress, p = .01, and self‐efficacy, p < .001, all showed improvements, as did observer‐rated mother?infant interactions, p < .001. In the RCT, depression, p < .001, anxiety, p = .005, and stress, p < .001, symptoms were significantly reduced for intervention participants (n = 16), as compared to wait‐list participants (n = 15). The CHUGS program had high participant satisfaction and produced improvements in self‐efficacy, depression, anxiety, stress, and mother?infant interactions that supported the program's acceptability and the utility of further rollout. 相似文献
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The results of two experiments supported the hypothesis that, for sexist men, exposure to sexist humor can promote the behavioral release of prejudice against women. Experiment 1 demonstrated that hostile sexism predicted the amount of money participants were willing to donate to a women's organization after reading sexist jokes but not after reading nonhumorous sexist statements or neutral jokes. Experiment 2 showed that hostile sexism predicted the amount of money participants cut from the budget of a women's organization relative to four other student organizations upon exposure to sexist comedy skits but not neutral comedy skits. A perceived local norm of approval of funding cuts for the women's organization mediated the relationship between hostile sexism and discrimination against the women's organization. 相似文献
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Positivity and the Construction of Life Satisfaction Judgments: Global Happiness is not the Sum of its Parts 总被引:3,自引:0,他引:3
Ed Diener Christie K. Napa-Scollon Shigehiro Oishi Vivian Dzokoto Eunkook Mark Suh 《Journal of Happiness Studies》2000,1(2):159-176
The present study investigated how reports of satisfaction with specific versus global domains can be used to assess a disposition towards positivity in subjective well-being reports. College students from 41 societies (N = 7167) completed measures of life satisfaction and ratings of global and specific aspects of their lives. For example, participants rated satisfaction with their education (global) and satisfaction with their professors, textbooks, and lectures (specific). It was hypothesized that global measures would more strongly reflect individual differences in dispositional positivity, that is, a propensity to evaluate aspects of life in general as good. At both the individual and national levels, positivity predicted life satisfaction beyond objective measures. Also, positivity was associated with norms about ideal life satisfaction such that countries and individuals who highly valued positive emotions were more likely to display positivity. The difference between more global versus more concrete measures of satisfaction can be used as an indirect and subtle measure of positivity. 相似文献