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101.
Pointing with the index finger is a universal behavior. However, the functional significance of indexical pointing has not been examined empirically. We examined the efficacy of various pointing gestures in evoking viewer's attentional shifts. After viewing the gesture cue, observers quickly reported the location of a visual target. With a short cue‐target delay, reaction times were generally shorter for the target at the location where gesture cues pointed, but not with a long cue‐target delay. Moreover, the indexical pointing gesture produced a significantly larger cueing effect than the other gestures. Our control experiments indicated that the index‐finger advantage is tightly linked to the proper morphological shape (i.e. length and position of the index finger) of the indexical pointing and is not explained by the directional discriminability of the gesture. The visual system seems to use mechanisms that are partially independent of the directional discrimination of gestures, in order to quickly modulate the viewer's attention. 相似文献
102.
Executive dysfunction is a characteristic impairment of individuals with Autism Spectrum Disorders (ASD). However whether such deficits are related to autism per se, or to associated intellectual disability is unclear. This paper examines executive functions in a group of children with ASD (N = 54, all IQ?70) in relation to a typically developing control group individually matched on the basis of age, gender, IQ and vocabulary. Significant impairments in the inhibition of prepotent responses (Stroop, Junior Hayling Test) and planning (Tower of London) were reported for children with ASD, with preserved performance for mental flexibility (Wisconsin Card Sorting Task) and generativity (Verbal Fluency). Atypical age-related patterns of performance were reported on tasks tapping response inhibition and self-monitoring for children with ASD compared to controls. The disparity between these and previous research findings are discussed. A multidimensional notion of executive functions is proposed, with difficulties in planning, the inhibition of prepotent responses and self-monitoring reflecting characteristic features of ASD that are independent of IQ and verbal ability, and relatively stable across the childhood years. 相似文献
103.
Number-form synesthetes consciously experience numbers in spatially-defined locations. For non-synesthete individuals, a similar association of numbers and space appears in the form of an implicit mental number line as signified by the distance effect–reaction time decreases as the numerical distance between compared numbers increases. In the current experiment, three number-form synesthetes and two different non-synesthete control groups (Hebrew speaking and English speaking) performed a number comparison task. Synesthete participants exhibited a sizeable distance effect only when presented numbers were congruent with their number-form. In contrast, the controls exhibited a distance effect regardless of congruency or presentation type. The findings suggest that: (a) number-form synesthesia impairs the ability to represent numbers in a flexible manner according to task demands; (b) number-form synesthesia is a genuine tangible experience, triggered involuntarily; and (c) the classic mental number line can be more pliable than previously thought and appears to be independent of cultural-lingo direction. 相似文献
104.
The purpose of this experiment is to test whether shift flexibility in kindergarten children is a joint function of rule‐usage and inhibition of attention. Sixty‐six children were given either a distraction or facilitation condition in a computerized version of the dimensional change card sort task. In the distraction condition, the background of the post‐shift matching stimulus was inconsistent with the relevant matching dimension. In the facilitation condition, the background of the post‐shift matching stimulus was consistent with the relevant matching dimension. Results revealed that children made few errors in the standard version of the shift task, thereby supporting Cognitive complexity and control theory's contention that 5‐year‐old children shift easily across dimensions due to their use of higher‐order setting rules to solve contradictions. The proportion of errors increased however in the distraction condition suggesting that attention to the background interfered with children's ability to shift between dimensions. Therefore, these data provide evidence that refocusing attention to dimensions along with rule‐use processes affect shift flexibility and argue for the inclusion of both factors into theoretical accounts of shift performance. Copyright © 2009 John Wiley & Sons, Ltd. 相似文献
105.
随着眼动研究的深入,近年来研究者受注意梯度指导理论影响,结合心理学的最新发展以及在相关实验研究的基础上提出了新的理论模型,其中最具代表性的是SWIFT模型。SWIFT模型遵循3条基本原则:(1)一定注意范围内的分布式词汇加工;(2)眼跳计划和目标选择的分离;(3)伴随中央凹目标抑制的眼跳机制。在构架上,该模型主要有两大功能模块:词汇加工和眼跳编程 相似文献
106.
如果先呈现若干分心物,然后添加靶子与其他分心物,那么就会改善搜索——预搜索效应。对于过滤分心物的潜在机制,研究者相继提出了主动抑制说、突然呈现说与时间分离说等理论。这些理论都有其合理的一面,能解释一些特定的实验现象,但任何单一机制都无法解释所有的实验现象。文章提出,未来的研究应该整合已有的实验现象与理论,系统考察旧客体与新客体的作用,重点整合抑制说与突现说,它们可能是一个连续体的两端 相似文献
107.
108.
注意捕获是指注意定向的过程中刺激不自觉地捕获注意的现象。在复杂的视觉搜索任务中,类别注意控制定势(cACS)能够帮助我们将注意引导到与目标定义类别匹配的刺激上,并对其进行优先加工。探讨cACS在注意捕获中的加工机制,不仅能够扩展注意捕获领域的理论研究,还能对实际生活提供指导。通过文献梳理,从cACS的作用阶段、cACS的加工强度及cACS作用时的激活脑区三个方面总结了注意捕获中的cACS的加工机制。未来研究可以就抑制分心物的ACS、不同类型的cACS加工差异和人工类别ACS加工过程等进行探讨。 相似文献
109.
When depression alternates with mania, as in a bipolar affective disorder, creativity might be enhanced. To investigate this, we employed a single‐subject design, looking at both affective space and the spectral covariation of mood and creativity in a participant presenting with bipolar affective disorder. The study was conducted over a period of 54 days, and employed a standard measure of mood (the Brief Mood Introspection Scale) and a standard task of creativity (Alternative Uses Task). Both positive affect and negative affect appear to be somewhat undifferentiated for this participant, and her mood space does not conform to that described by the accepted major dimensions of Arousal and Pleasure. Conceivably, this is because of her rapid mood fluctuations. A 2.7‐day periodicity was found for Tired, Peppy, Nervous, and Calm, on the one hand, and ideational fluency, ideational flexibility, and originality, on the other. In addition, a 9‐day periodicity was common to Happy, Sad, and Gloomy—all three affects clustering in the same affective space—together with both ideational flexibility and originality. This finding brings into question the relationship between creativity and both positive and negative mood. 相似文献
110.
《Scandinavian journal of psychology》2018,59(4):433-442
Despite the growing interest in the relationship between coping strategies and eudaimonic well‐being, few studies have examined this issue from the perspective of coping flexibility. Therefore, the present study aimed to: (1) identify approach coping profiles in the university context and (2) analyze the differences between these profiles in terms of eudaimonic well‐being. A prospective ex post facto design was used and 1,402 university students were selected through convenience sampling. Data were collected using validated self‐reported instruments. A latent profile analysis was conducted to identify the participants’ coping profiles. The relationship between profiles and eudaimonic well‐being was determined using a multivariate analysis of covariance (MANCOVA ), with gender, age, and university degree as covariates. Six student profiles were identified based on the degree to which they combined positive reappraisal, support seeking, and planning strategies. The profiles that involved the use of these three strategies to a greater extent experienced more eudaimonic well‐being, and vice versa. To analyze the impact of coping on eudaimonic well‐being, it is necessary to consider students’ ability to combine different approach coping strategies. 相似文献