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771.
Sensorimotor synchronization with adaptively timed sequences 总被引:1,自引:0,他引:1
Most studies of human sensorimotor synchronization require participants to coordinate actions with computer-controlled event sequences that are unresponsive to their behavior. In the present research, the computer was programmed to carry out phase and/or period correction in response to asynchronies between taps and tones, and thereby to modulate adaptively the timing of the auditory sequence that human participants were synchronizing with, as a human partner might do. In five experiments the computer's error correction parameters were varied over a wide range, including "uncooperative" settings that a human synchronization partner could not (or would not normally) adopt. Musically trained participants were able to maintain synchrony in all these situations, but their behavior varied systematically as a function of the computer's parameter settings. Computer simulations were conducted to infer the human participants' error correction parameters from statistical properties of their behavior (means, standard deviations, auto- and cross-correlations). The results suggest that participants maintained a fixed gain of phase correction as long as the computer was cooperative, but changed their error correction strategies adaptively when faced with an uncooperative computer. 相似文献
772.
Previous studies found little or no transfer of adaptation from reactive saccades to arm pointing movements, which suggests that the two motor systems rely on distinct adaptive mechanisms. However, this conclusion is based on experiments about the adaptation of response amplitudes, which is known to follow somewhat different principles than the adaptation of response directions. In the present study, we therefore investigate whether adapting the direction of reactive saccades will transfer to arm movements. We also test transfer in the opposite direction, from the arm to the eyes. Participants executed aimed saccades or arm movements from a central starting point towards visual targets in the participants' frontal plane. Targets were presented in eight possible locations along a circle of 20 cm radius about the starting point; each remained for 200 ms in one position, and was then displaced along the circle by -15 degrees . Participants from group E adapted to these double-stepped targets while executing eye movements, and were then tested for transfer while executing arm movements. The reciprocal design was used in participants from group A. Adaptive change in group A was about 14 degrees , while in group E it was only about 7 degrees . Transfer of adaptation was substantial, and was more pronounced when using the arm (i.e., eye-to-arm transfer in group E) rather than the eyes (i.e., arm-to-eye transfer in group A). Strong aftereffects were yielded in both groups. This pattern of findings implies that the adaptive change observed in our study was mainly based on recalibration rather than on cognitive strategies (strong aftereffects), that eyes and arm had access to a common adaptive mechanism (substantial transfer), and that the arm had better access than the eyes (larger adaptation and transfer when using the arm). When considering this outcome along with the available literature, it appears that arm and eyes may rely sometimes on a common and sometimes on distinct adaptive mechanisms, depending on the adapted parameter and on the nature of the motor task. 相似文献
773.
Peter Leeson Joseph Ciarrochi Patrick C.L. Heaven 《Personality and individual differences》2008,45(7):630-635
Does positive thinking predict variance in school grades over and above that predicted by cognitive ability? Six hundred and thirty nine high school students participated in a three-year longitudinal study that predicted grades using cognitive ability and three positive thinking variables – self-esteem, hope, and attributional style. Hope, positive attributional style and cognitive ability predicted higher grades, whilst self-esteem was a less consistent predictor of academic performance. Structural equation modelling revealed significant paths from cognitive ability, gender, and a second order positive thinking factor to grades. The results suggest that intelligence, gender, and positive thinking each play a unique role in predicting academic performance in youth. Some suggestions for further research are made. 相似文献
774.
Zheng-Xue Luo Kan Shi Wen-Dong Li Dan-Min Miao 《Asian Journal of Social Psychology》2008,11(3):222-231
The construct of job performance has been one of the important topics in job performance research. The present study investigated the construct of job performance among Chinese military soldiers using both qualitative and quantitative methods. First, after interviewing 95 officers and soldiers, we categorized and conceptualized eight sets of typical behavioural incidents related to soldiers' job performance, and designed a questionnaire measuring job performance. Then, using a sample of 1402 Chinese soldiers, questionnaire reliability and validity were tested, and then the questionnaire was revised. The construct of job performance was further refined using confirmatory factor analyses and regression analyses using another sample of 1068 soldiers. The results showed that Chinese military soldiers' job performance consisted of two dimensions of task performance and contextual performance. Furthermore, task performance had three subfactors: military training, task accomplishment and work capability, whereas contextual performance encompassed four factors: helping others, love of learning, promoting organizational benefit and self-discipline. Task performance and contextual performance contributed independently to overall job performance. 相似文献
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777.
坏心情与工作行为:中庸思维跨层次的调节作用 总被引:1,自引:0,他引:1
本研究探讨工作中坏心情与3种工作行为(组织公民行为、反生产行为和任务绩效行为)在个体内水平的关系, 以及中庸思维在二者间跨层次的调节作用。采用经验抽样方法, 通过对72名员工历时两周的追踪调查, 获取被试每日心情状态和每日工作行为的数据。HLM 6.02分析表明:(1)每日坏心情显著地负向影响每日的组织公民行为和任务绩效行为, 而对反生产行为无显著影响; (2)中庸思维在“心情-行为”的联系间发挥调节作用, 高中庸思维者的坏心情对组织公民行为的负向影响较弱, 低中庸思维者的坏心情对组织公民行为的负向影响较强; 高中庸思维者的坏心情对任务绩效行为产生正向影响, 低中庸思维者的坏心情对任务绩效行为产生负向影响。 相似文献
778.
779.
John W. Lounsbury Lucy W. Gibson Frances L. Hamrick 《Journal of business and psychology》2004,18(4):427-451
Using six studies based on 23,823 individuals in diverse settings, we developed and validated a personality measure of Work Drive—a disposition to work long hours and extend oneself for one's job. The factor structure was confirmed in four settings. Work Drive was related to job performance showing incremental validity beyond cognitive aptitude and Big Five personality traits in five validation studies. It predicted academic performance at six different grade levels, even beyond Big Five traits. Construct validity was examined via work values, job involvement, normal personality scales, satisfaction measures, and cognitive ability. Little adverse impact was found. Occupational groups differed on Work Drive. Overall validity and areas of application were discussed. 相似文献
780.