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101.
Chad M. Sylvester Diana J. Whalen Andy C. Belden Shana L. Sanchez Joan L. Luby Deanna M. Barch 《Child development》2018,89(3):734-745
High shyness during early adolescence is associated with impaired peer relationships and risk for psychiatric disorders. Little is known, however, about the relation between shyness and trajectories of brain development over early adolescence. The current study longitudinally examined trajectories of resting‐state functional connectivity (rs‐fc) within four brain networks in 147 adolescents. Subjects underwent functional magnetic resonance imaging at three different time points, at average ages 10.5 (range = 7.8–13.0), 11.7 (range = 9.3–14.1), and 12.9 years (range = 10.1–15.2). Multilevel linear modeling indicated that high shyness was associated with a less steep negative slope of default mode network (DMN) rs‐fc over early adolescence relative to low shyness. Less steep decreases in DMN rs‐fc may relate to increased self‐focus in adolescents with high shyness. 相似文献
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The purpose of this study was to examine the effects of parameter variability on the learning of generalized motor programs (GMP) and movement parameterization. Participants attempted to exert a force pattern that resembled in force and time a waveform displayed on a computer monitor.The analysis suggested that relative timing (a measure of the GMP) performance remained remarkably stable across retention and transfer tests, whereby the structure of the movement remained intact, although the parameter or muscle group (effector) changed during transfer The results also indicated that variable parameter (time) practice did not enhance GMP learning but did degrade the learning parameter that was not varied (force). In addition, parameter specification was substantially less stable than the GMP, with time and force parameter performance deteriorating from the retention to transfer tests. These findings suggest that parameter specification, and not the GMP, is the primary cause of poorer performance in parameter and effector transfer. 相似文献
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Teachers sometimes do things that negatively impact their own credibility in classroom settings. One way instructors maintain credibility among students is by keeping a veil between their personal and professional personas. The advent of Facebook presents new challenges for instructors seeking to keep their personal lives private in order to maintain credibility among students. In educational settings, Facebook communications can blur the personal and professional boundaries that students and professors are accustomed to. As such, instructors in higher education sometimes struggle with the implications of ‘friending’ students in the context of social networking. The purpose of this study was to examine whether or not educator usage of Facebook had any impact on student perceptions of instructor credibility. Facebook presence was examined in the context of teacher ‘misbehaviors’ (that is, actions by educators that negatively impact their credibility). A modified version of Teven and McCroskey’s (1997) Source Credibility Instrument was given to a sample of college students (N?=?187) to compare instructors that use Facebook with those who do not. While students appear to be generally accepting of instructor usage of the social tool, some findings suggest that there are probably ways to abuse it in a manner that could lead to negative perceptions of credibility. Ultimately, results from this study indicated that there were no significant differences among student perceptions of instructor credibility based on whether or not an educator used Facebook. 相似文献
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Susan D. Mcmahon Andrew Martinez Dorothy Espelage Chad Rose Linda A. Reddy Kathleen Lane Eric M. Anderman Cecil R. Reynolds Abraham Jones Veda Brown 《Psychology in the schools》2014,51(7):753-766
Teachers in U.S. schools report high rates of victimization, yet previous studies focus on select types of victimization and student perpetrators, which may underestimate the extent of the problem. This national study was based on work conducted by the American Psychological Association Classroom Violence Directed Against Teachers Task Force and is one of the few national studies to examine violence directed at teachers. Participants included 2,998 kindergarten through 12th‐grade (K‐12) teachers from 48 states who completed an anonymous web‐based survey assessing their experiences with victimization. Results revealed that 80% of teachers reported at least one victimization, and of these teachers, 94% reported being victimized by students. Nearly three‐fourths of all teachers experienced at least one harassment offense, more than half experienced property offenses, and 44% reported physical attacks. Findings suggest that specific teacher and community characteristics are associated with a higher likelihood of victimization, namely, male gender and urban settings; whereas, African American teachers were less likely to report victimization. Implications for teacher training, school interventions, public policy, and future research are discussed. 相似文献
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