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121.
Richard L. Sprott Marcus B. Waller 《Journal of the experimental analysis of behavior》1966,9(6):663-669
Three experiments sought to evaluate the effect of electroconvulsive shock on the action of a reinforcing stimulus. In all experiments behavior was maintained on a 2 min variable interval schedule for food reinforcement. Foot shock at the termination of a buzzer stimulus served as the reinforcing stimulus for conditioned suppression during the ensuing buzzer interval. Omission of foot shock at the termination of the buzzer stimulus was followed by normal responding (no conditioned suppression) during the next buzzer interval. In Exp I electroconvulsive shock followed foot shock at varying time intervals. In the first subsidiary experiment electroconvulsive shock followed an unreinforced buzzer stimulus at varying time intervals. In the second subsidiary experiment electroconvulsive shock followed foot shock at varying time intervals and an additional buzzer stimulus was sounded between the termination of foot shock and the onset of electroconvulsive shock. These three experiments demonstrated that electroconvulsive shock invariably abolished the effects of the reinforcing stimulus if it followed conditioning by no more than 10.0 sec and never had an effect if it followed conditioning by 12.5 sec or more; electroconvulsive shock was not acting as a reinforcing stimulus in this situation. 相似文献
122.
A F Fontana R L Rosenberg J L Marcus R D Kerns 《Journal of personality and social psychology》1987,52(1):177-183
The constructs of the Type A behavior pattern and the Inhibited Power Motive Syndrome (IPMS) have many features in common. The empirical relation between the two constructs was investigated in this study with 45 employed, male medical and surgical patients. Four different measures of the Type A pattern were examined. Results showed that, of the four measures, the Structured Interview and the Hostility Scale were related significantly to the IPMS. Systolic blood pressure reactivity was also related significantly to the IPMS. These relations could be ascribed largely to activity inhibition alone. The contribution of activity inhibition to an understanding of the biological and psychological substrates of the Type A behavior pattern is discussed. 相似文献
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Mindfulness training for loneliness among Chinese college students: A pilot randomized controlled trial
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Loneliness has been found to predict a wide range of physical and mental health problems. It is suggested that China's One‐Child Policy places young Chinese people at a particularly high risk for loneliness. Although loneliness is most prevalent in late adolescence and early adulthood, interventions have primarily targeted children or older adults with limited success. The current study examines a pilot randomized controlled trial of a mindfulness training program among Chinese college students. Participants with elevated loneliness (N = 50, ages 17–25) were randomized into either an 8‐week mindfulness training or a control group. Self‐reported measures of loneliness and mindfulness were administered at baseline and posttest. The training group also completed a program evaluation form and a 3‐month follow‐up assessment. Results provided preliminary evidence indicating that the intervention was feasible and effective at reducing loneliness among Chinese college students. Limitations and future directions were discussed. 相似文献
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Displacement of the cerebellar tonsils in Chiari type I malformation (CMI) can affect functions controlled by the cerebellum and brainstem. While playing an integral role in the control of movement, the cerebellum also has widespread cortical connections, influencing a range of cognitive process. A systematic literature review was conducted to examine the relationship between cognition and CMI, assessing evidence for general or domain-specific cognitive change. The search protocol examined the AMED, CINAHL, Cochrane Library, EMBASE, MEDLINE, PsycINFO, and Scopus databases. Articles meeting the following criteria were included in this review (i) examined children or adults with a clinically defined diagnosis of CMI, (ii) assessed cognitive function with a prospective examination, (iii) included at least one standardized instrument designed to measure general or specific domains of cognitive function, and (iv) were published in English in a peer-reviewed journal. Twelve articles were identified, including 783 cases aged 3 months to 64 years. General cognition, processing speed, and learning and memory appeared less affected, while language deficits appeared to diminish with age. Executive dysfunction was the most commonly reported cognitive impairment, while attention and working memory, and visuospatial and perceptual skills also appeared vulnerable. Numerous methodological limitations were identified that should be considered in interpreting the impact of CMI and planning future investigations. Overall, there is currently insufficient evidence to describe a valid and reliable profile of cognitive impairment in CMI. Further research is required to confirm these preliminary psychometric results and integrate them with pathophysiological models 相似文献
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