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31.
Recently identified pathways from the dentate nuclei of the cerebellum to the rostral cerebral cortex via the thalamus suggest a cerebellar role in frontal and prefrontal non-motor functioning. Disturbance of cerebellar morphology and connectivity, particularly involving these cerebellothalamocortical (CTC) projections, has been implicated in motivational and cognitive deficits. The current study explored the effects of CTC disruption on motivation in male Long Evans rats. The results of two experiments demonstrate that electrolytic lesions of the cerebellar dentate nuclei lower breaking points on an operant conditioning progressive ratio schedule and decrease open field exploration compared to sham controls. Changes occurred in the absence of motor impairment, assessed via lever pressing frequency and rotarod performance. Similar elevated plus maze performances between lesioned and sham animals indicated that anxiety did not influence task performance. Our results demonstrate hedonic and purposive motivational reduction and suggest a CTC role in global motivational processes. These implications are discussed in terms of psychiatric disorders such as schizophrenia and autism, in which cerebellar damage and motivational deficits often present concomitantly. 相似文献
32.
Organizational research and practice involving ratings are rife with what the authors term ill-structured measurement designs (ISMDs)--designs in which raters and ratees are neither fully crossed nor nested. This article explores the implications of ISMDs for estimating interrater reliability. The authors first provide a mock example that illustrates potential problems that ISMDs create for common reliability estimators (e.g., Pearson correlations, intraclass correlations). Next, the authors propose an alternative reliability estimator--G(q,k)--that resolves problems with traditional estimators and is equally appropriate for crossed, nested, and ill-structured designs. By using Monte Carlo simulation, the authors evaluate the accuracy of traditional reliability estimators compared with that of G(q,k) for ratings arising from ISMDs. Regardless of condition, G(q,k) yielded estimates as precise or more precise than those of traditional estimators. The advantage of G(q,k) over the traditional estimators became more pronounced with increases in the (a) overlap between the sets of raters that rated each ratee and (b) ratio of rater main effect variance to true score variance. Discussion focuses on implications of this work for organizational research and practice. 相似文献
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This story explores an intervention conducted in a Catholic parish community in New York City. The intervention, conducted by the author and a Jesuit priest, focused on issues of unity and diversity among the various Chinese immigrant subgroups in the parish (primarily Cantonese‐ and Mandarin‐speakers). Issues of class, power, and a history of colonialism in the Catholic Church are explored as central to the relations among culturally diverse Chinese American community members and between the members and the practitioners and the church authority. The author especially focuses on how the dynamics that played out in the intervention reflected wider issues of economics, labor practices, and political elitism in the wider Chinatown community. A central part of the author's argument is about power relationships between this parish community and Chinatown and how these power relationships are embedded within broader racial and economic oppression within the United States. 相似文献
36.
Robert H. Stupnisky Robert D. Renaud Raymond P. Perry Joelle C. Ruthig Tara L. Haynes Rodney A. Clifton 《Social Psychology of Education》2007,10(3):303-330
Due to its widespread popularity, self-esteem is continually being promoted to students despite limited empirical support
for its effectiveness in improving their academic achievement. As a result, constructs that are potentially more salient to
academic performance, such as perceived control, have gone relatively unnoticed. Although past research has examined the link
between students’ academic achievement and either their self-esteem or perceived control, few studies have compared both constructs simultaneously to elucidate which one is more important to academic success. This longitudinal study directly
contrasted the effects of self-esteem and perceived control on the academic performance of 802 first-year college students.
After accounting for incoming ability (high school grades), age, and gender, a structural equation model showed perceived
control positively predicted students’ GPA. In contrast, the predictive effect of self-esteem on GPA was non-existent. Findings
indicate that compared to self-esteem, perceived control is a more powerful predictor of first-year college students’ GPA.
Implications for utilizing educational interventions to boost perceived control among college students are discussed. 相似文献
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by Rodney D. Holder 《Zygon》2009,44(1):115-132
The German theologian and martyr Dietrich Bonhoeffer is not widely known for engaging with scientific thought, having been heavily influenced by Karl Barth's celebrated stance against natural theology. However, during the period of his maturing theology in prison Bonhoeffer read a significant scientific work, Carl Friedrich von Weizsäcker's The World View of Physics. From this he gained two major insights for his theological outlook. First, he realized that the notion of a "God of the gaps" is futile, not just in science but in other areas of human inquiry. Second, he felt that an infinite universe, as considered by science, would be self-subsistent and could exist as if there were no God. Bonhoeffer replaced Barth's radical critique of religion with the even more extreme view that it is a mere passing phase in history that grown-up humanity can dispense with. At the same time Bonhoeffer began an important critique of Barth's reaction, namely, the latter's retreat to a "positivism of revelation." While Bonhoeffer did not go quite as far as one might like, his approach opened up hopeful avenues for an answer to "the liberal question" and even a revived place for some kind of natural theology. 相似文献
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Amanda W. Harrell Sterett H. Mercer Melissa E. DeRosier 《Journal of child and family studies》2009,18(4):378-387
We evaluated the efficacy of a social skills training intervention designed to improve adolescents’ social, emotional and
behavioral adjustment, Social Skills Group Intervention-Adolescent (S.S.GRIN-A). Seventy-four adolescents (ages 13–16 years)
and their parents were randomly assigned to either the treatment group (N = 40) or a wait-list control group (N = 34). Adolescents in the treatment and control groups were compared on global self-concept, social self-efficacy, internalizing
problems, and externalizing problems pre- and post-intervention. Youth in the treatment group demonstrated enhanced global
self-concept, increased social self-efficacy, and decreased internalizing problems as compared to youth in the control group.
No differences in externalizing behavior were found. We discuss the effectiveness of S.S.GRIN-A as a general program designed
for addressing a range of adjustment issues and social skill deficits in adolescents. 相似文献
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Smoking in College Women: The Role of Thinness Pressures, Media Exposure, and Critical Consciousness 总被引:1,自引:0,他引:1
Alyssa N. Zucker Zaje A. Harrell Kathie Miner-Rubino Abigail J. Stewart Cynthia S. Pomerleau & Carol J. Boyd 《Psychology of women quarterly》2001,25(3):233-241
There are strong social pressures for U.S. females, particularly those of European heritage, to achieve and maintain an extremely low body weight. These pressures are reflected in a variety of media sources, including advertising. We argue that valuing thinness, exposure to thinness-depicting media, and lacking skepticism about tobacco advertisements have adverse effects on young women's decisions about smoking, particularly smoking for weight control. We tested these hypotheses in a study of 188 female undergraduates, both never-smokers and daily smokers. Believing that smoking controls weight, exposure to thinness-depicting media, and low levels of skepticism about tobacco advertising were associated with being a smoker. Among smokers, believing that smoking controls weight, internalizing thinness pressures, and low levels of feminist consciousness were associated with smoking for weight control. Results are discussed with the aim of encouraging public health anti-smoking campaigns targeted at women, and smoking cessation programs that are responsive to the needs of weight-concerned female smokers. 相似文献