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231.
Plateaus,Dips, and Leaps: Where to Look for Inventions and Discoveries During Skilled Performance
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The framework of plateaus, dips, and leaps shines light on periods when individuals may be inventing new methods of skilled performance. We begin with a review of the role performance plateaus have played in (a) experimental psychology, (b) human–computer interaction, and (c) cognitive science. We then reanalyze two classic studies of individual performance to show plateaus and dips which resulted in performance leaps. For a third study, we show how the statistical methods of Changepoint Analysis plus a few simple heuristics may direct our focus to periods of performance change for individuals. For the researcher, dips become the marker of exploration where performance suffers as new methods are invented and tested. Leaps mark the implementation of a successful new method and an incremental jump above the path plotted by smooth and steady log–log performance increments. The methods developed during these dips and leaps are the key to surpassing one's teachers and acquiring extreme expertise. 相似文献
232.
相对到达时间任务(RAT)是判断两个运动客体哪个先到达指定目标, 可用来评估个体动态空间能力。采用RAT任务对飞行员与普通被试进行对照研究, 寻求发现两组在运动客体特征和视觉空间运动特征及其相互关系上的处理差异。设计了3个实验分别考察客体颜色、客体大小、运动方向、速率大小、视线方向以及背景特征对判断的影响。结果显示:(1)客体颜色不影响运动客体的相对时间判断, 客体大小、运动方向、速率大小、视线方向以及背景特征影响判断; (2)控制组对显示屏上从左到右的运动客体的相对时间判断好于从右到左任务, 大速率任务判断更好, 对大客体快速行驶而小客体低速行驶时的相对到达时间更易区分, 且与两眼视线方向不一致的运动方向会使控制组判断更难, 运动背景中的目标线特征改变使控制组判断绩效降低; (3)和控制组比, 飞行员反应快正确率高, 其快速判断优势集中体现在从右到左运动以及小速率任务上, 且在不同运动方向和不同速率上的反应时均无差异, 飞行员的处理优势还表现在不受客体大小、视线方向改变和目标线特征改变的影响。结论:飞行员能在变化的空间中准确处理相对速度、相对距离、相对时间等运动信息, 能分离客体大小、背景、运动方向等因素对相对到达时间判断的影响, 在运动空间中飞行员具有较高场独立性认知特征和动态空间处理能力。 相似文献
233.
Kathleen M. O’Connor Josh A. Arnold Andrea M. Maurizio 《Journal of experimental social psychology》2010,46(5):729-735
Despite a significant literature on the impact of stress on performance in achievement settings, little is known about whether and how stress might matter for would-be negotiators. In two studies, we investigate how bargainers cognitively appraise a looming negotiation, whether its prospect is stressful and what the consequences are for performance. Individuals who appraised a prospective negotiation as a threat experienced more stress ahead of a negotiation, and reached lower quality deals compared to those who had appraised a challenge. Results from a follow-up experiment showed that would-be negotiators who had appraised a threat behaved more passively and were less likely to use tough tactics compared to those who appraised a challenge. Those who appraised a threat also had relatively inaccurate perceptions of their partners’ priorities and interests, which undermined their outcomes. The outcome advantage for those who appraised a challenge was limited to negotiations that contained integrative potential. 相似文献
234.
Rebecca W. Hamilton Stefano Puntoni Nader T. Tavassoli 《Organizational behavior and human decision processes》2010
Categorization is a core psychological process that is central to decision making. While a substantial amount of research has been conducted to examine individual categorization behavior, little is known about how the outputs of individual and group categorization may differ. Four experiments demonstrate that group categorization differs systematically from individual categorization in the structural dimension of category breadth: categorizing the same set of items, groups tend to create a larger number of smaller categories than individuals. This effect of social context is a function of both taskwork and teamwork. In terms of taskwork, groups’ greater available knowledge mediates differences in category breadth between individuals and groups by increasing utilized knowledge (study 2). In terms of teamwork, task conflict moderates the effect of social context on category breadth (study 3). Moreover, the experience of categorizing individually or in a group influences individuals’ subsequent judgments (study 4). 相似文献
235.
H. Bennacer 《Psychologie Fran?aise》2005,50(4):451-469
This study aims to grasp and understand the role of some personal features and some dynamical mechanisms of the personality in the determination of the pupil's academic behaviour. A general model is developed and tested, on a sample of 336 elementary school pupils, with respect to three principles: causal order, association and non-artificiality. The data analysis is then refined by developing a structural model. The results prove that the dynamical mechanisms of the personality relating to the affective entry characteristics should be considered as dependent and independent variables. They allow to identify the principal personal determinants of pupil rowdyism, reaction toward class, making friends and academic achievement. 相似文献
236.
Jazmine Espejo Eric Anthony Day Ginamarie Scott 《Personality and individual differences》2005,38(8):1867-1877
We proposed that intermittent evaluations of performance could be used to promote the acquisition of a complex skill. We also hypothesized that trainees low in need for cognition (NFC) would benefit more from intermittent evaluations compared to trainees high in NFC. Accordingly, 106 young adult males participated in 5 h of training in order to learn a complex computer task that simulated the demands of a dynamic aviation environment. Trainees’ performance was assessed either intermittently during training or at the end of training. Results indicated that intermittent performance evaluations enhanced the skill-based learning of trainees low in NFC, whereas intermittent skill evaluations tended to undermine the skill-based learning of trainees high in NFC. The findings are discussed in relation to Deci’s (1975) theory of intrinsic motivation and the need for more research examining attribute–treatment interactions with respect to training and skill acquisition. 相似文献
237.
Terri R. Kurtzberg Charles E. Naquin Liuba Y. Belkin 《Organizational behavior and human decision processes》2005,98(2):1294-226
Across three empirical studies, this paper explores the effect of using e-mail as a communication medium (versus pen-and-paper) when conducting performance appraisals of peers. The notion put forth by Media Richness Theory that paper-form and e-mail media should be considered identical for conveying this information was theoretically challenged and differences were empirically supported. Using two different settings, results demonstrate that evaluators offered more negative appraisals of their peers when using e-mail than when using traditional paper-form methods. Reduced feelings of social obligation in the e-mail condition were found to mediate this relationship, indicating that social psychological processes can influence the effects of different media on peer ratings. 相似文献
238.
Two studies examine the effects of speech styles and task interdependence on status conferral judgments. In both studies, participants were exposed to an individual who used either a powerful or powerless speech style in a low or high task interdependence group, and made judgments about the amount of status to confer to the individual. When task interdependence was low, participants conferred more status to powerful speakers, whereas when interdependence was high, participants conferred more status to powerless speakers. Furthermore, Study 2 demonstrated that speech styles influenced trait inferences about the speaker (agency and communality), but these traits were weighted differently in status conferral judgments across groups. These findings provide insight into both the relationship between observed behaviors and status positions and the decision process underlying status conferral judgments. 相似文献
239.
Supporting Out‐of‐School Time Staff in Low Resource Communities: A Professional Development Approach
Anne F. Farrell Melissa A. Collier‐Meek Melanie J. Furman 《American journal of community psychology》2019,63(3-4):378-390
Federally funded out‐of‐school time (OST) programs provide academic support, enrichment, and safety for students and families in low‐resource communities. However, programs struggle to meet these aims, in part because of the lack of program structure and limited training and support for staff. This observational case study documents the training and technical assistance (TA) delivered to OST frontline staff and program leadership to implement Positive Behavior in Out‐of‐School Time (Positive BOOST), an adaptation of positive behavior interventions and supports conducted in multiple settings. Findings across three programs indicate that varied levels of TA (i.e., business as usual, performance feedback, coaching) are associated with different levels of staff‐ and program‐level implementation. Taken together with previous research, these findings suggest that targeted investment in developing the skills of OST staff and improving program‐wide outcomes is critical for supporting youth in low‐resource communities. 相似文献
240.
The purpose of this study was to explore the level of inter- and intra-individual variability in the kinematic profiles of the back squat movement among skilled weightlifters. Ten competitive weightlifters volunteered for participation in this study. Barbell velocity (VBarbell) and angular velocity of the ankle (ωAnkle), knee (ωKnee) and hip joint (ωHip) were obtained by kinematic recording of six trials at 90% of 1RM in the back squat. Inter-individual variability was assessed by analysing inter-individual differences in the velocity curves through the statistical parametric mapping method. Intra-individual variability was assessed through a correlation analysis between the barbell velocity curves of each trial for each participant. Partial least squares regression analysis, was performed to relate changes in intra-individual variability to movement and anthropometric characteristics. Significant inter- and intra-individual differences were identified in VBarbell, ωAnkle, ωKnee, and ωHip (p ≤ 0.05). Having a short trunk and thigh, and a long shin in combination with greater anterior-posterior displacement of the barbell and slower velocities during the acceleration phase increased intra-individual movement consistency over movement variability. The results of the present study clearly demonstrate that skilled weightlifters display both significant inter- and intra-individual variability in the successful execution of the back squat. 相似文献