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111.
The objective of this study was to investigate the coordination of a whole-body task (basketball free-throw) in which success in performance outcome can be achieved through a manifold of combinations of postural and movement trajectory configurations. Participants were healthy men (19–24 years) with a range of skill levels that were tested for the accuracy of 50 basketball free-throws with both their dominant and non-dominant hand. The trial-to-trial variance in release parameters as well as postural stability of the shooter and synchronization of postural movement and ball release were strong predictors of performance, with non-elite shooters having a higher mean and variability of center-of-mass (COM) speed at the time of ball release. The synchronization between the time of peak COM and the time of ball release increased as a function of skill level and hand dominance, with the better performers releasing the ball more closely to the time of COM peak height. These findings reveal how, in addition to successfully controlling the trial-to-trial variability along the solution manifold of release parameters, the relative importance of the coordination of postural control and ball release properties on shooting success changes as a function of skill level. 相似文献
112.
Prediction Consistency: A Test of the Equivalence Assumption Across Different Indicators of the Same Construct.
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Prominent theoretical constructs such as the Big Five personality factors often inspire the development and use of different inventories. This practice rests on the vital assumption that different indicators equivalently assess the same construct—otherwise, it would often be inappropriate to draw conclusions on the construct level. In comparison to the evidence typically relied on to support this equivalence assumption, we argue that a direct test of prediction consistency will provide further insights: prediction consistency is a necessary condition for the equivalence assumption that indicators from different inventories predict an external criterion to the same extent. Here, we outline guidelines how to design studies to establish prediction consistency and illustrate this approach in an experiment testing the prediction consistency of the Agreeableness indicators from three prominent Big Five inventories. Specifically, we considered prediction consistency with respect to honesty (vs. cheating) as the behavioral criterion for which a specific a priori hypothesis can be derived on theoretical grounds. Results contradicted predictions consistency and thus the equivalence assumption by showing qualitatively different relations to behavioral honesty, thereby also emphasizing that the interchangeability of inventories should generally be subjected to a strict test, rather than assumed. Copyright © 2016 European Association of Personality Psychology 相似文献
113.
Music is strongly intertwined with memories—for example, hearing a song from the past can transport you back in time, triggering the sights, sounds, and feelings of a specific event. This association between music and vivid autobiographical memory is intuitively apparent, but the idea that music is intimately tied with memories, seemingly more so than other potent memory cues (e.g., familiar faces), has not been empirically tested. Here, we compared memories evoked by music to those evoked by famous faces, predicting that music-evoked autobiographical memories (MEAMs) would be more vivid. Participants listened to 30 songs, viewed 30 faces, and reported on memories that were evoked. Memories were transcribed and coded for vividness as in Levine, B., Svoboda, E., Hay, J. F., Winocur, G., & Moscovitch, M. [2002. Aging and autobiographical memory: Dissociating episodic from semantic retrieval. Psychology and Aging, 17, 677–689]. In support of our hypothesis, MEAMs were more vivid than autobiographical memories evoked by faces. MEAMs contained a greater proportion of internal details and a greater number of perceptual details, while face-evoked memories contained a greater number of external details. Additionally, we identified sex differences in memory vividness: for both stimulus categories, women retrieved more vivid memories than men. The results show that music not only effectively evokes autobiographical memories, but that these memories are more vivid than those evoked by famous faces. 相似文献
114.
The purpose of the present studies was to evaluate and predict academic cheating with regard to a national examination in a Middle East country. In Study 1, 4,024 students took part and potential cheaters were classified as those having discrepant scores in multiple administrations that exceeded 1 SD in absolute terms. A latent class mixture analysis suggested two pathways for potential cheating: (a) The first path involved students—most male—who changed city or region of examination during test taking, and (b) the second path described students—most male—who did not change city, region, or center of administration. Study 2 profiled cheaters using a sample of examinees who were actually caught cheating. Participants were 545 students, 253 of whom were caught cheating between 2002 and 2012. Both samples were selected from a pool of 319,219 testees using random sampling procedures. Results indicated that a 4-class solution best fitted the data as in Study 1. Furthermore, a predictive model was tested with an independent cross-validation sample of 112 examinees (56 cheaters, 56 noncheaters). Results indicated that the model classified correctly 78.57 of the new cheating cases (sensitivity) and 94.64% of noncheaters (specificity). 相似文献
115.
Maria Giammarco Adriana Paoletti Emma B. Guild Naseem Al-Aidroos 《Visual cognition》2016,24(1):78-101
A remarkable ability of the human visual system is the implementation of attentional control settings (ACSs) that govern what stimuli capture or hold attention. We provide evidence that ACSs can be specified by episodic long-term memory representations. In all experiments, participants memorized 30 images of objects that they then monitored for in an attention task, inducing an episodic-based ACS. In Experiments 1a and 1b, only studied cues in a cueing task captured attention. We confirmed these cueing effects reflect capture by testing for inhibition of return in Experiment 2a, and controlled for perceptual masking by cues in Experiment 2b. In Experiment 3 we determined that ACSs are specifically supported by episodic retrieval, by dividing studied images into two sets and designating one as the targets in a rapid serial visual presentation task: Only target-set matching distractors produced a spatial blink (captured attention). These results extend our understanding of the representations specifying ACSs. 相似文献
116.
异族效应(other-race effect) 是一种在面孔加工研究领域中被研究者广为熟之的一种社会性知觉现象。具体而言,就是指个体识别异族面孔的成绩显著低于本族面孔。大量的研究证据表明个体在知觉他人的情绪面孔时,会表现出明显的异族面孔效应。但就目前而言,研究者还不了解自上而下的情绪预期(top-down emotional prediction) 是如何影响面孔识别过程中的异族效应。本研究采用线索-目标范式(cue-target)对该问题进行了考察,实验通过操纵“一致试次”的比率,来区分预期 (75% 的“一致”实验试次) 与非预期实验条件 (50% 的“一致”实验试次)。本实验招募28名健康的大学生被试(12名女性,16名男性)参加正式实验,这些被试无精神疾病、情绪障碍、视力缺陷等疾病。实验后,每一名被试都获得一定的实验报酬。实验结果发现,在正性和负性情绪不预期条件下,个体表现出了对异族面孔的识别劣势,即个体识别异族面孔表情的反应时更长。虽然在负性情绪预期条件下,个体仍然表现出了对异族面孔的识别劣势,但在正性情绪预期条件下,个体对异族面孔的这种识别劣势却消失。这些研究结果表明先前的正性面孔情绪预期有效地消除了异族效应。因此,可以认为自上而下的情绪预期可能是一种促进劣势知觉加工的认知管理策略。 相似文献
117.
This study examines whether, and how, multiple risks in early childhood are associated with an increased likelihood of a poor language or literacy outcome in early adolescence. Using data from 210 participants in the longitudinal Twins Early Developmental Study, we focus on the following risk factors at age 4: family risk, and poor language, speech, emergent literacy and nonverbal skills. The outcomes of interest at age 12 are language, reading fluency and reading comprehension. We contrast a ‘cumulative risk’ model, counting the presence or absence of each risk factor (breadth), with a model that also considers the severity of the early deficits (depth). A ‘cumulative risk index’ correlated modestly but significantly with outcome (r = 0.32–0.40). Odds ratios confirmed that having many risk factors (3–6) confers a higher probability of a poor outcome (OR 7.86–17.71) than having one or two (OR 3.65–7.28). Logistic regression models showed that predictive validity is not improved by including information about the severity of each deficit. Even with rich information on children's risk status at age 4, we can make only a moderately accurate prediction of the likelihood of a language or literacy disorder 8 years later (Area Under the Curve = 0.74–0.84; Positive Predictive Value = 0.33–0.55, Negative Predictive Value = 0.86–0.91). Taken together, and consistent with the idea of ‘cumulative risk’, these results suggest that the breadth of risk is a core predictor of outcome, and furthermore, that the severity of early deficits does not add significantly to this prediction. 相似文献
118.
Young children, like adults, understand that human agents can flexibly choose different actions in different contexts, and they evaluate these agents based on such choices. However, little is known about children's tendencies to attribute the capacity to choose to robots, despite increased contact with robotic agents. In this paper, we compare 5- to 7-year-old children's and adults’ attributions of free choice to a robot and to a human child by using a series of tasks measuring agency attribution, action prediction, and choice attribution. In morally neutral scenarios, children ascribed similar levels of free choice to the robot and the human, while adults were more likely to ascribe free choice to the human. For morally relevant scenarios, however, both age groups considered the robot's actions to be more constrained than the human's actions. These findings demonstrate that children and adults hold a nuanced understanding of free choice that is sensitive to both the agent type and constraints within a given scenario. 相似文献
119.
当人们与搭档组成社会群体一起协作讨论某些已经发生的事件或经验时, 该社会群体中的成员关系对协作提取成绩的影响仍不明确。本研究通过两项实验, 分别使用语词词单和情景故事作为实验材料, 考察成员关系(包括关系类型和关系时长)对协作提取成绩的影响。研究结果表明, 当记忆的材料为语词词单时, 青年陌生组出现了协作抑制; 而当记忆的材料为情景故事时, 青年夫妻和老年夫妻组均出现了协作促进。此外, 老年夫妻在协作提取情景故事的过程中使用的有效交流策略更多, 且这些有效交流策略的使用与更高的协作提取成绩有关。该结果支持了具有长时亲密关系的老年夫妻之间的“交互记忆系统”对协作促进的关键作用, 为理解成员关系对协作提取成绩的影响提供了全面的证据。 相似文献
120.
将情景中的各要素绑定加工成连贯的关系结构,是形成情景记忆的核心过程。本研究使用图像配对联想学习任务,在测试阶段采用自由回忆、线索回忆和再认任务,考察了儿童二元和三元绑定能力的发展及其中编码和提取能力的影响。结果表明,绑定加工能力随年龄增长而提高,二元绑定比三元绑定的发展开始得更早。编码水平对两种绑定能力存在不同影响,5岁儿童已经具有成熟的编码信息进行二元绑定加工的能力;但三元绑定受限于编码缺陷,在6.5岁后才因相应编码能力的缓慢提高而得到少量发展。但在儿童期内,二元和三元绑定同时受到了提取能力发展的促进。 相似文献