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41.
M. L. Matthews 《Attention, perception & psychophysics》1971,9(1):15-22
Increment threshold of a small test probe is found to be elevated by backgrounds of a disk, bar, or luminance step. The spatial parameters that produce maximum masking are found to be essentially similar with the three types of background. The lime course of masking is also found to be similar for the disk and bar background. It is suggested that a fundamentally similar type of visual processing underlies each of the masking situations. 相似文献
42.
T. James Matthews 《Behavior research methods》1968,1(3):126-128
The Convective Thermal Controller (CTC) is designed to provide rapid and precise control of a thermal stimulus for application to behavioral experiments with small animals. Subjects are bathed in one of two continuously recirculating air systems; two valves determine which of the systems play on S. When the systems are stabilized at different temperatures, actuation of the valves can produce an abrupt and stable temperature change in .3 sec. Behavioral observations indicate that escape learning occurs readily; latency decreases monotonically with drive intensity and increases monotonically with reinforcement duration. 相似文献
43.
Some factors involved in the comparison of response systems: acquisition, extinction, and transfer of head-poke and lever-press Sidman avoidance 下载免费PDF全文
John J. B. Ayres James O. Benedict Richard Glackenmeyer William Matthews 《Journal of the experimental analysis of behavior》1974,22(2):371-379
Head poking, a suggested natural escape reaction to shock for the rat, was compared to lever pressing in a Sidman avoidance study. Both responses could be emitted at any time, but only one was effective in a given session. Acquisition and extinction of the two responses were compared under both signalled and unsignalled avoidance. Then, a test for transfer was conducted in which acquisition conditions were re-instated, but the effectiveness of the responses was reversed. Three differences between responses were noted: (a) head poking was superior in reducing shock rates under signalled conditions; (b) head poking was more resistant to extinction, especially under signalled conditions; (c) under unsignalled conditions, animals were unable to learn to head poke if they had previously learned to lever press. Findings a and c were pursued in later experiments. Finding a depended on the location of the warning signal with respect to the response system. When the lever press required approach to the warning signal, the head poke was superior. But when the head poke required approach to the warning signal, the two responses were equally effective. Finding c depended on the absence of feedback for head poke during transfer. Two conclusions are offered: first, the two responses appear to obey the same laws when their topographical differences are taken into account. Second, response feedback appears to be more critical in transfer than in original acquisition. 相似文献
44.
Exploring Divergent Patterns in Racial Identity Profiles Between Caribbean Black American and African American Adolescents: The Links to Perceived Discrimination and Psychological Concerns 下载免费PDF全文
Delida Sanchez Keisha L. Bentley‐Edwards J. S. Matthews Teresa Granillo 《Journal of multicultural counseling and development》2016,44(4):285-304
Using cluster analyses, this study explored the relations among racial identity, perceived discrimination, and psychological concerns among 189 Caribbean Black American and African American adolescents. Findings showed that for all participants, less mature racial identity profiles were significantly related to perceived discrimination and psychological concerns. However, nuances in racial identity profiles between Caribbean Black American and African American participants suggest subtle ethnic group differences in racial identity development. Implications for practitioners and research are discussed. Usando análisis cluster, este estudio exploró las relaciones entre identidad racial, discriminación percibida y preocupaciones psicológicas en 189 adolescentes afroamericanos y americanos negros caribeños. Los hallazgos mostraron que, para todos los participantes, los perfiles de identidad racial menos maduros estaban significativamente relacionados con una discriminación percibida y preocupaciones psicológicas. Sin embargo, los matices de los perfiles de identidad racial entre los participantes afroamericanos y americanos negros caribeños sugieren unas diferencias sutiles entre ambos grupos étnicos en el desarrollo de la identidad racial. Se discuten las implicaciones para practicantes e investigadores. 相似文献
45.
Tom Booth Aja Louise Murray Mathilde Overduin Madelynn Matthews Adrian Furnham 《Journal of business and psychology》2016,31(2):205-216
Purpose
Identifying the characteristics of chief executive officers (CEOs) has been a longstanding goal in leadership and individual differences research. The purpose of this exploratory study was to consider which individual difference and career path variables differentiate CEOs from other senior managers.Design/Methodology/Approach
Participants (N = 1152) were UK-based senior managers (n = 1040) and CEOs (n = 112) who completed a self-report measure of the Five Factor Model of personality (NEO-PI-R), a measure of cognitive ability (graduate and management aptitude test), and answered a number of additional questions on their career paths as part of development centres. Analyses comprised inter-individual mean difference tests, intra-individual external profile analysis and logistic regression.Findings
Results indicated that personality facets of impulsiveness, vulnerability, activity and dutifulness showed the largest mean differences. No significant effects were found for the criterion profile pattern, but significant effects were found for profile level. Of the additional predictors, career path variables were the strongest predictors of CEO status.Implications
The combination of significant effects across domains of individual differences and career path variables emphasizes the importance of a multivariate approach in the study of leadership, top management teams and career progression.Originality/Value
The current study combines personality, cognitive ability, demographic and career path variables, and applies intra-individual methodologies to explore the characteristics of the very top level of organisational hierarchy.46.
This review examines the effect of background stressors with acute stressor reactivity and recovery in the 19 available studies. Background stressors were associated with increased acute stressor reactivity in slightly over half of the studies of ongoing stressors. However, a substantial minority of studies demonstrated reduced acute stressor reactivity, suggesting habituation for certain people in certain situations. Background stressors were associated with delayed blood-pressure and immunological recovery from acute stressor events, but were not associated with delayed heart-rate recovery. Possible mechanisms underlying the association between background stressors and acute stressor reactivity and recovery are discussed. Background stressors should be measured thoroughly in future acute stress research to understand the meaning of the acute stress responses. 相似文献
47.
The Girls' Circle is a support group for adolescent girls developed by Beth Hossfeld and Giovanna Taormina as a unique program that addresses the needs of girls by focusing on increasing connections, building empathic skills, and developing resiliency. The present study evaluates the effectiveness of the Girls' Circle intervention on improving social support, body image, locus of control, self-efficacy, and self-esteem. Sixty-three girls from 9 support groups (comprising 5 to 15 girls each) across the United States completed the Multidimensional Scale of Perceived Social Support, the Body Parts Satisfaction Scale, the Nowicki-Strickland Personal Reaction Survey, Schwarzer's General Self-Efficacy Scale, and the Rosenberg Self-Esteem scale both before and after the 10-week Girls' Circle program. Results revealed a significant increase in social support, body image, and self-efficacy after completion of the program. 相似文献
48.
49.
School science education is currently the subject of much debate. Historians and philosophers of science should play a role in this debate. Since the late nineteenth century there has been a persistent, if minor, tradition arguing for the incorporation of historical and philosophical dimensions in the teaching of school science. With the current crisis in science teaching, there are encouraging signs that more attention is being paid to this tradition. What is required is much greater collaboration between philosophers, historians, and science educators, particularly in the training of teachers.This article is a shortened version of my 1988, A Role for History and Philosophy in Science Teaching, inEducational Philosophy and Theory
20 (2). All references are to the following History, Philosophy, and Science Teaching: A Bibliography.This special number ofSynthese is part of a large international project on the place of history and philosophy in science teaching. Special issues ofEducational Philosophy and Theory, Interchange, andStudies in Philosophy and Education are being produced. An international conference on the subject will be held at Florida State University in November 1989. Details of the journals and the conference can be obtained from the author.The project commenced while the author was on leave at Florida State University in 1987. It began with a gracious invitation from Jaakko Hintikka to guest edit this number, and was furthered with the support and encouragement of David Gruender. I thank them both, and also the Philosophy Department for its hospitality. Special appreciation is due to the nearly 30 authors who have contributed papers to the project. I hope that their efforts will re-open the needed dialogue between historians, philosophers, and science educators. 相似文献
50.
John Michael Holden J Bruce Overmier Elizabeth Todd Cowan Lisa Matthews 《Integrative Physiological and Behavioral Science》2004,39(4):334-340
Research on consolidation of long-term memory suggests that acute immune system activation induced by endotoxin lipopolysaccharide (LPS) may disrupt consolidation of newly acquired learning. Adult male Sprague-Dawley rats were trained to perform a simple Y-maze task and were immediately afterwards administered LPS (15 microg/kg) or saline. After a seven-day interval, subjects were returned to the Y-maze and were retrained to criterion. It was found that subjects treated with saline required significantly fewer trials to relearn the task relative to the LPS group and a no-partial-learning control group, which themselves did not differ. These results are most readily explained in terms of a disruptive effect of acute immune system activation on consolidation of newly induced acquired memories. 相似文献