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排序方式: 共有146条查询结果,搜索用时 15 毫秒
131.
132.
Vansteenwegen D Hermans D Vervliet B Francken G Beckers T Baeyens F Eelen P 《Behaviour research and therapy》2005,43(3):323-336
In a differential human fear conditioning paradigm evidence for ABA-renewal was obtained manipulating the lighting in the experimental room. During acquisition in either a dark or illuminated room, one neutral slide was sometimes paired with a loud aversive noise whereas another slide was not. Subsequently, extinction took place in the opposite lighting context. When afterwards the participants were tested again in the original acquisition context, measurements revealed a recovery of the conditioned electrodermal response and an increase in the retrospective verbal US-expectancy ratings. No response recovery was obtained in an AAA-group that received acquisition, extinction and test trials in one and the same context. Several theoretical explanations for this type of return of fear as well as implications for clinical practice are discussed. 相似文献
133.
Lore Van Hulle Georgiana Juravle Charles Spence Geert Crombez Stefaan Van Damme 《Consciousness and cognition》2013,22(2):420-429
Tactile perception is often impaired during movement. The present study investigated whether such sensory suppression also occurs during back movements, and whether this would be modulated by attention. In two tactile detection experiments, participants simultaneously engaged in a movement task, in which they executed a back-bending movement, and a perceptual task, consisting of the detection of subtle tactile stimuli administered to their upper or lower back. The focus of participants’ attention was manipulated by raising the probability that one of the back locations would be stimulated. The results revealed that tactile detection was suppressed during the execution of the back movements. Furthermore, the results of Experiment 2 revealed that when the stimulus was always presented to the attended location, tactile suppression was substantially reduced, suggesting that sensory suppression can be modulated by top-down attentional processes. The potential of this paradigm for studying tactile information processing in clinical populations is discussed. 相似文献
134.
Maja Deković Ina M. Koning Geert Jan Stams Kirsten L. Buist 《Anxiety, stress, and coping》2013,26(4):377-386
Abstract The aim of the present study was to identify factors that are related to the traumatic symptoms and problem behavior among adolescents who experienced the New Years fire in 2001 in Volendam, The Netherlands. Three groups of factors were considered: pre-trauma (personality and coping), trauma-related (physical and emotional proximity to disaster), and post-trauma factors (received social support). Forty-five adolescents completed the questionnaire. Two years after the disaster, these adolescents experienced significant traumatic stress reaction (70% within the clinical range) and showed clinically significant levels of internalizing problems (37%). Pre-trauma, individual factors were identified as the most important predictors of distress, followed by received social support. The indicators of physical and emotional proximity to disaster explained little variance in distress. 相似文献
135.
Stefaan Van Damme Geert Crombez Liesbet Goubert Christopher Eccleston 《Psychology & health》2013,28(4):367-371
Abstract This study was designed to assess the effects of exercise on psychological functioning in healthy Type A men. Seventy-three middle-aged men (M=42.2 years) were randomly assigned either to an aerobic exercise (AE) training group or to a strength and flexibility (SF) training group. Subjects completed a comprehensive psychological assessment battery prior to beginning the 12-week exercise programs, and after completing the programs. The psychological test battery included measures of depression, anxiety and stress, as well as various psychiatric symptoms. In addition, subjects underwent graded exercise treadmill tests (ETT) at both times of measurement in order to document changes in cardiorespiratory fitness. Aerobic exercise training consisted of walking, jogging or stair-climbing at an intensity of at least 70% of initial measured maximal oxygen consumption (VO2max determined during the treadmill test). Strength and flexibility training consisted of circuit Nautilus training with no aerobic exercise. Results at the conclusion of the 12-week programs indicated that [Vdot]O2max for the AE group increased by 15%, while the SF group did not change. Both groups improved on measures of psychological well-being; however, there were no differential effects of the two exercise programs on measures of psychological functioning. These results suggest that improved cardiovascular fitness is not necessary for psychological improvement among exercise participants. 相似文献
136.
We assessed the effects of aging in the transfer of motor learning in a sequential manual assembly task that is representative for real working conditions. On two different days, young (18–30 years) and middle-aged adults (50–65 years) practiced to build two products that consisted of the same six components but which had to be assembled in a partly different order. Assembly accuracy and movement time during tests, which were performed before and after the practice sessions, were compared to determine proactive and retroactive transfer. 相似文献
137.
Reliability measures in item response theory: Manifest versus latent correlation functions
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Elasma Milanzi Geert Molenberghs Ariel Alonso Geert Verbeke Paul De Boeck 《The British journal of mathematical and statistical psychology》2015,68(1):43-64
For item response theory (IRT) models, which belong to the class of generalized linear or non‐linear mixed models, reliability at the scale of observed scores (i.e., manifest correlation) is more difficult to calculate than latent correlation based reliability, but usually of greater scientific interest. This is not least because it cannot be calculated explicitly when the logit link is used in conjunction with normal random effects. As such, approximations such as Fisher's information coefficient, Cronbach's α, or the latent correlation are calculated, allegedly because it is easy to do so. Cronbach's α has well‐known and serious drawbacks, Fisher's information is not meaningful under certain circumstances, and there is an important but often overlooked difference between latent and manifest correlations. Here, manifest correlation refers to correlation between observed scores, while latent correlation refers to correlation between scores at the latent (e.g., logit or probit) scale. Thus, using one in place of the other can lead to erroneous conclusions. Taylor series based reliability measures, which are based on manifest correlation functions, are derived and a careful comparison of reliability measures based on latent correlations, Fisher's information, and exact reliability is carried out. The latent correlations are virtually always considerably higher than their manifest counterparts, Fisher's information measure shows no coherent behaviour (it is even negative in some cases), while the newly introduced Taylor series based approximations reflect the exact reliability very closely. Comparisons among the various types of correlations, for various IRT models, are made using algebraic expressions, Monte Carlo simulations, and data analysis. Given the light computational burden and the performance of Taylor series based reliability measures, their use is recommended. 相似文献
138.
Caljouw SR van der Kamp J Lijster M Savelsbergh GJ 《Consciousness and cognition》2011,20(4):1135-1143
In the reported, experiment participants hit a ball to aim at the vertex of a Müller–Lyer configuration. This configuration either remained stable, changed its shaft length or the orientation of the tails during movement execution. A significant illusion bias was observed in all perturbation conditions, but not in the stationary condition. The illusion bias emerged for perturbations shortly after movement onset and for perturbations during execution, the latter of which allowed only a minimum of time for making adjustments (i.e., approx.170 ms). These findings indicate that allocentric information is exploited for online control when people make rapid adjustments in response to a sudden change in the environment and not when people guide their limb movements to interact with a stable environment. 相似文献
139.
Cristina Colonnesi Geert Jan J.M. Stams Irene Koster Marc J. Noom 《Developmental Review》2010,30(4):352-366
The use of the pointing gesture is one of the first ways to communicate with the world. This gesture emerges before the second year of life and it is assumed to be the first form of intentional communication. This meta-analysis examined the concurrent and longitudinal relation between pointing and the emergence of language. Twenty-five studies were included into the meta-analysis, including 734 children. The role of several moderators was examined: pointing modality, pointing motive, age at which the pointing was measured, the assessment method of the pointing gesture and language development, the modality of language, SES, and country. The results showed both a concurrent (r = .52) and a longitudinal (r = .35) relation between pointing and language development. The relation between pointing and language development became stronger with age, and was found for pointing with a declarative and general motive, but not for pointing with an imperative motive. It is concluded that the pointing gesture is a key joint-attention behavior involved in the acquisition of language. 相似文献
140.
The Guilty Knowledge Test (GKT; Lykken, 1959) assesses whether suspects conceal information about a crime ( “guilty knowledge”). Previous studies have demonstrated larger physiological reactions to guilty knowledge compared to unknown information. In three experiments, we investigated whether guilty knowledge also demands attention. During an alleged polygraph examination, participants were presented with to‐be‐detected pictures ( “guilty knowledge”), nonsignificant, familiar pictures ( “mere knowledge”), and previously unseen pictures ( “neutral information”) for 250 ms in a modified dot probe task. In all three experiments, probe responses were slower on guilty knowledge trials as compared to the neutral trials. Results are discussed in terms of an information‐processing view on orienting to guilty knowledge. 相似文献