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排序方式: 共有179条查询结果,搜索用时 15 毫秒
71.
Both cognitive conflict (e.g. Verguts & Notebaert, 2009) and reward signals (e.g. Waszak & Pholulamdeth, 2009) have been proposed to enhance task-relevant associations. Bringing these two notions together, we predicted that reward modulates conflict-based sequential adaptations in cognitive control. This was tested combining either a single flanker task (Experiment 1) or a task-switch paradigm (Experiment 2) with performance-related rewards. Both experiments confirmed that adaptations after conflict were modulated by reward. In the flanker task, this resulted in increased conflict adaptation after rewarded trials. In the task-switching experiment, reward increased the conflict-modulated switch cost. Interestingly, both adaptations to conflict disappeared after no-reward trials. Moreover, individual differences in participants' sensitivity to reward predicted these reward modulations of trial-to-trial adaptations. These findings shed new light on the exact role of cognitive conflict in shaping subsequent behavior. 相似文献
72.
Aïte A Cassotti M Rossi S Poirel N Lubin A Houdé O Moutier S 《Journal of experimental child psychology》2012,113(2):286-294
Converging developmental decision-making studies have demonstrated that until late adolescence, individuals prefer options for which the risk of a loss is low regardless of the final outcome. Recent works have shown a similar inability to consider both loss frequency and final outcome among adults. The current study aimed to identify developmental changes in feedback-monitoring ability to consider both loss frequency and final outcome in decision making under ambiguity. Children, adolescents, and adults performed an adapted version of the Soochow Gambling Task. Our results showed that children and adolescents presented an exclusive preference for options associated with infrequent punishment. In contrast, only adults seemed to consider both loss frequency and the final outcome by favoring the advantageous options when the frequency of losses was low. These findings suggest that the ability to integrate both loss frequency and final outcome develops with age. Moreover, the analysis of strategic adjustments following gains and losses reveals that adults switch less often after losses compared with children and adolescents. This finding suggests that psychological tolerance to loss may facilitate learning the characteristics of each option and improve the ability to choose advantageously. 相似文献
73.
We consider properties of sequences of spatial regions, as seen from a viewpoint. In particular, we concentrate on two types of regions: (1) general domains in which a region is any subset of the space, and (2) axis-parallel domains, where the regions are boxes in an N-dimensional space. We introduce binary relations allowing to express properties of these sequences and present two approaches to process them. First, we show that constraints on these relations can be solved in polynomial time for general domain and that the same problem is NP-complete in the axis-parallel case. Second, we introduce a modal logic on these relations, called Visibility Logic, and show that model-checking on a finite sequence of regions can be done in polynomial time (both in the general and axis-parallel cases). Finally, we present applications to image processing and firewall filtering. 相似文献
74.
Laurette Hay Michelle Fleury Chantal Bard Normand Teasdale 《Journal of motor behavior》2013,45(1):36-42
Children aged 6 to 10 were tested on their ability to move accurately and to perceptually evaluate their motor response. Subjects performed a directional and an amplitude visuo-manual aiming task without vision of their moving limb. They were asked to correct their error, after completion of their movements, only if they felt they were not accurate. Terminal aiming errors and correction responses (adjustments) were analyzed, and threshold detection was determined relative to terminal aiming error. Action accuracy and evaluation of action accuracy are two abilities that do not develop synchronously. Moreover, the relationship between these abilities depends on whether accuracy and direction or amplitude are required. Amplitude undergoes more corrections than direction, suggesting that the spatial system of reference involved depends more upon the coding of the final position than on direction. Two spatial comparators, operating on the basis of two types of evaluation, seem to have a variably distinct contribution to movement and perception accuracy, according to age. 相似文献
75.
Intuitive predictions and judgments under conditions of uncertainty are often mediated by judgment heuristics that sometimes lead to biases. Using the classical conjunction bias example, the present study examines the relationship between receptivity to metacognitive executive training and emotion-based learning ability indexed by Iowa Gambling Task (IGT) performance. After completing a computerised version of the IGT, participants were trained to avoid conjunction bias on a frequency judgment task derived from the works of Tversky and Kahneman. Pre- and post-test performances were assessed via another probability judgment task. Results clearly showed that participants who produced a biased answer despite the experimental training (individual patterns of the biased → biased type) mainly had less emotion-based learning ability in IGT. Better emotion-based learning ability was observed in participants whose response pattern was biased → logical. These findings argue in favour of the capacity of the human mind/brain to overcome reasoning bias when trained under executive programming conditions and as a function of emotional warning sensitivity. 相似文献
76.
Restrained eaters act on impulse 总被引:4,自引:0,他引:4
Chantal Nederkoorn Yvonne Van Eijs Anita Jansen 《Personality and individual differences》2004,37(8):1651-1658
Impulsivity and bulimic symptoms often go together. It is not only the eating behaviour of bulimics that is impulsive; many studies show that the eating disorder frequently is accompanied by non-eating related impulsive behaviours like substance abuse, self-harm or theft. This co-morbidity suggests that there might be a more basic lack of inhibitory control that makes someone vulnerable for both the bulimic symptoms and the other impulsive behaviours. The present study tested whether an analogous group of 34 restrained eaters showed a basic inhibitory control deficit by using a stop-signal task, compared to 29 control women. It was found that the restrained eaters were significantly worse in inhibiting their basic non-food related motor responses than unrestrained eaters. Food exposure during the task did not affect motor performance. A fundamental lack of general response inhibition might play a role in the development of a specific eating disinhibition. 相似文献
77.
Michelle Fleury Chantal Bard Michel Audiffren Normand Teasdale Jean Blouin 《The Quarterly Journal of Experimental Psychology Section A: Human Experimental Psychology》1994,47(2):481-495
The aim of this study was to investigate the comparative cost of accuracy constraints in direction or amplitude for movement regulation. The attentional cost is operationally defined as the amount of disturbance created in a secondary task by the simultaneous execution of a pointing task in direction or amplitude. The cost is expressed in terms of modifications in response to a secondary task, consisting of a foot-pedal release in response to an auditory stimulus (probe). The probe was introduced during the programming portion or the first, middle, or last portion of the pointing movement. The independent variables were the requirements of the task: direction or amplitude, and the moments of occurrence of the probe. Subjects were submitted to eight experimental conditions: (1) simple foot reaction time to a buzzer; (2) single directional task; (3) single amplitude task; (4) dual directional task (i.e. directional task with probe); (5) dual amplitude task (i.e. amplitude task with probe); (6) retest of foot simple reaction time; (7) retest of single directional task; and (8) retest of single amplitude task. Regulation in direction was more attention-demanding than regulation in distance in terms of programming. During pointing in amplitude, probe RT increased monotonically from start to end of movement execution, whereas directional pointing did not lead to any significant probe RT changes. These results emphasize the specific attentional loads for directional and amplitude pointing tasks, hence the involvement of different central nervous system mechanisms for the programming and regulation of the directional and amplitude parameters of pointing movements. 相似文献
78.
79.
Research on infant cognition using habituation methods has sparked considerable controversy in recent years. At the core of the debates is the issue of whether infants have early (and possibly innate) conceptual understandings. This article reviews a range of computational models of habituation that might provide insights into such discussions. The models are assessed against key behavioral and neural features of habituation: temporal unfolding, exponential decrease, familiarity-to-novelty shift, habituation to repeated testing, discriminability of habitual items, selective inhibition and cortical-subcortical interactions. The review suggests that current models fail to offer comprehensive explanations of the behavioral phenomena. 相似文献
80.
Experiment 1 showed that the control mechanism based on a perception–movement coupling observed in certain goal-directed movement tasks (De Rugy, Montagne, Buekers, & Laurent, 2000; Montagne, Cornus, Glize, Quaine, & Laurent, 2000) can be extended to a stepping across an obstacle task. Regardless of the specificity of tasks, the initiation of regulations is a function of the amount of adjustment. Our participants organized their regulation later than long jumpers. Two additional experiments were conceived to investigate whether this control mechanism could be generalized to goal-directed locomotor displacements, with different constraints. The aim of Experiments 2 and 3 was to address the adaptation of this control mechanism by manipulating the obstacle width and the walking speed in a stepping across task. The results showed that the functioning of this control mechanism could be influenced by the spatiotemporal constraints. Participants' behavior depended on a perception–movement coupling. This study suggests the existence of a generic control mechanism based on a perception–movement coupling, and it emphasizes the adaptation of this type of control mechanism involved in goal-directed displacements. 相似文献