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This study investigated whether the age trend in forgiveness is partly attributable to age differences in time perspective. Eighty-nine younger and 91 older adults were randomized into 3 experimental conditions: time-expanded, time-limited, and neutral. They responded to hypothetical offensive scenarios and rated the degree to which they would forgive the perpetrator. Results showed that older adults were more forgiving than younger adults, but regardless of age, those in the time-limited condition were more forgiving than those in the time-expanded or the neutral condition. An Age x Time perspective interaction showed that only in older adults did a time-expanded manipulation lead to lower forgiveness than the neutral condition. (PsycINFO Database Record (c) 2008 APA, all rights reserved). 相似文献
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The role of arms in compliant-surface jumping for maximizing backward somersault rotations is studied using multi-segment models and is applied to springboard diving. The surface (springboard) is modeled by a rigid bar with a rotational spring with a hinged end and point mass at the tip. Planar four- and five-segment human models are used (with the fifth segment representing the arms) and are driven by torque actuators at the ankle, knee, hip, and shoulder. Each joint torque is the product of maximum isometric torque and three variable functions depending on instantaneous joint angle, angular velocity, and activation level, respectively. Movement simulation starts from a balanced initial posture and ends at jump takeoff. The objective is to find joint torque activation patterns during board contact so that the number of backward rotations in flight is maximized. Kinematic differences in jumps with and without arms are mainly in smaller takeoff vertical velocity and more flexed knee and hip in the former. In both jumps, joint torque/activations are similar in their minor flexion-full extension patterns. Maximum hip torque is larger with arms but maximum knee torque is larger without arms. Except at the knee, more joint work can be done with arm swing. Total angular momentum is increased considerably by arm motion because of its remote contribution. Consequently segment remote contributions to total angular momentum are much larger in jumping with arms. Shoulder strength helps generate angular momentum only to a certain limit. If more work is used to generate horizontal velocity away from the board, the amount of total angular momentum is reduced. 相似文献
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This study investigated how novices re-organized motor system degrees of freedom when practicing a multi-articular discrete kicking task. Four male participants practiced a soccer chipping task to seven different target positions over 12 sessions for 4 weeks. Data from each participant indicated changes in degrees of freedom involvement as a function of practice. Further, each participant showed a different progression of change in levels of joint involvement for hip, knee and ankle in the kicking limb. Cross-correlations between joints in the kicking limb also showed different pathways of coupling and de-coupling with practice. Performance outcome scores improved and variability of intra-limb coordination decreased as a consequence of practice for all participants. Angle-angle plots also showed qualitative changes in intra-limb coordination between early and late practice sessions. Evidence suggested that foot velocity at ball contact was functionally manipulated by participants when kicking to target positions with varying height and distance constraints. Referencing data to a model of learning [Newell, K. M. (1985). Coordination, control and skill. In: Goodman, D., Franks, I., & Wilberg, R.B. (Eds.), Differing perspectives in motor learning, memory, and control. Amsterdam: North-Holland, pp. 295-317] determined that progression through different stages of learning may not be sequential and could alternate between learning stages. The present study highlighted individual differences in acquisition of coordination and control of joint motion even under similar task constraints, showing how degeneracy in movement systems facilitates learning. 相似文献
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研究者以239名10岁、11岁和12岁的儿童为实验对象,采用四种作业时间(2分钟、4分钟、6分钟和8分钟)和两种指导语导向(无导向、导向独特性)为实验条件,考察了这些条件对儿童发散性思维的影响.结果发现,作业时间和指导语导向对儿童发散性思维的流畅性,变通性和独特性均有明显的影响.在该实验条件下,发散性思维的三个指标随作业时间的增加而增加.有导向组儿童的发散性思维作业成绩显著高于无导向组.另外,在各实验条件下,儿童的作业成绩都有随着年龄的增长而上升的趋势. 相似文献
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Paternalistic leadership and subordinate responses: Establishing a leadership model in Chinese organizations 总被引:13,自引:0,他引:13
Bor-Shiuan Cheng Li-Fang Chou Tsung-Yu Wu Min-Ping Huang Jiing-Lih Farh 《Asian Journal of Social Psychology》2004,7(1):89-117
Paternalistic leadership (PL) is the prevalent leadership style in Chinese business organizations. With an approach similar to patriarchy, PL entails an evident and powerful authority that shows consideration for subordinates with moral leadership. Although PL is widespread in Chinese business organizations, very few studies have focused on this leadership style and those that have were simply conceptual analyses and not empirical studies. We sampled 543 subordinates from local businesses in Taiwan to investigate PL, Western transformational leadership, and subordinate responses to these two leadership styles. Our hypotheses were as follows: (1) PL has a significant and unique effect on subordinate responses compared to Western transformational leadership; (2) there exists an interaction between the three elements of PL (benevolence, morality, and authoritarianism) and subordinate responses; and (3) the authority orientation of a subordinate's traditionality has a moderating effect upon the relation between PL and subordinate responses. Statistical analyses generally supported these hypotheses. Directions for follow-up studies are offered and implications for leadership theory and practice are discussed. 相似文献