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91.
Although the relation between teacher–student relationship and academic achievement has been addressed in many studies, the reciprocal relations between these two constructs have not been explored sufficiently. The aim of the present study was to test three competing models that hypothesized directionality of influence in relations between teacher acceptance, student-perceived teacher support, and academic achievement. Eight hundred sixteen students from 3 different grade levels in Slovenian elementary and secondary schools, covering the age range from late childhood through early-to-middle adolescence, participated in the study at the beginning and at the end of the school year. Structural equation modeling was used. Different models of relations between teacher acceptance, student-perceived teacher support, and academic achievement were analyzed using the cross-lagged panel correlation technique. The results supported the hypothesized reciprocal model, indicating the relation between teacher acceptance and academic achievement in both directions. Student-perceived teacher personal support partially mediates the relation between teacher acceptance and achievement in both directions on the whole sample but not in specific age groups. Finally, we found some age-specific differences in the relations between teacher acceptance, teacher personal support, and achievement. 相似文献
92.
The study investigated the coordination and variability of posture and pistol motion for skilled pistol shooters and novices in a pistol-aiming task. The participants stood on a force platform and held a pistol with the preferred arm to aim for accuracy to a target on 30 s trials. The results revealed that the amount of the centre of pressure (COP) and pistol motion was lower for the expert than novice group. The time–varying structure of COP as indexed by multiscale entropy (MSE) and detrended fluctuation analysis (DFA) was also lower for the expert than the novice group. The relative phase between the COP in the anterior–posterior (AP) and pistol in the AP and between the COP in the medial–lateral (ML) and pistol in AP was close to inphase for the both groups. However, for the novice group the coordination patterns of posture and pistol motion were more variable with the pistol motion leading the posture motion while it was lagging in the skilled group. The findings show different qualitative and quantitative dynamics in pistol-aiming as a function of skill level with postural control foundational to supporting the reduced dispersion and complexity of the skilled arm-pistol motion. 相似文献