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791.
Stefan Van der Stigchel Artem V. Belopolsky Jasper G. Wijnen Jan Theeuwes 《Acta psychologica》2009,132(3):201-534
The extent to which spatial selection is driven by the goals of the observer and by the properties of the environment is one of the major issues in the field of visual attention. Here we review recent experimental evidence from behavioral and eye movement studies suggesting that top-down control has temporal and spatial limits. More specifically, we argue that the first feedforward sweep of information is bottom-up, and that top-down control can influence selection only after the sweep is completed. In addition, top-down control can limit spatial selection through adjusting the size of attentional window, an area of visual space which receives priority in information sampling. Finally, we discuss the evidence found using brain imaging techniques for top-down control in an attempt to reconcile it with behavioral findings. We conclude by discussing theoretical implications of these results for the current models of visual selection. 相似文献
792.
An K. Raes Rudi De Raedt Bruno Verschuere Jan De Houwer 《Behaviour research and therapy》2009,47(12):1096-1101
Exposure therapy is an effective technique for fear reduction. However, whether effective exposure requires attentional allocation to the feared situation remains a debated clinical issue. In the present study, the impact of attention allocation in extinction was investigated in an experimental conditioning study. Through a between-subjects manipulation of cognitive load, we created a condition in which participants could allocate their attention to the feared stimulus during extinction (low load condition), and a condition in which attentional allocation was impaired (high load condition). The influence of cognitive load on extinction was examined by comparing electrodermal responses and verbal ratings for the conditioned stimuli in the two extinction load conditions. The results show less successful extinction in the high load condition than in the low load condition. However, this effect was found only in low anxious participants, and it was prominent only on the skin conductance responses. The present results suggest that extinction is not automatic but requires cognitive resources. 相似文献
793.
In avoidance learning studies, a warning signal (Sd) is directly paired with an aversive unconditioned stimulus (US) unless a particular response is performed. Research by Augustson and Dougher (1997) demonstrated that not only warning signals but also stimuli that are indirectly paired with the aversive event are capable of affecting the avoidance response. In the present study, we extended these results by incorporating a sensory preconditioning paradigm in an avoidance learning procedure. Sensory preconditioning training influenced the selection of avoidance responses in the presence of warning signals that were never paired directly with the aversive events. Moreover, results suggest that the selection of the avoidance responses was based on an integration of knowledge about the relation between the Sd and the US (S-S knowledge) and knowledge about the relation between the avoidance response and the US (R-S knowledge). As the expectancy-based theory of Lovibond (2006) is the only theory of avoidance that incorporates both knowledge structures, the results provide unique support for this theory. 相似文献
794.
ENSEMBLE RECORDINGS IN AWAKE RATS: ACHIEVING BEHAVIORAL REGULARITY DURING MULTIMODAL STIMULUS PROCESSING AND DISCRIMINATIVE LEARNING
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Eunjeong Lee Ana I. Oliveira‐Ferreira Ed de Water Hans Gerritsen Mattijs C. Bakker Jan A. W. Kalwij Tjerk van Goudoever Wietze H. Buster Cyriel M. A. Pennartz 《Journal of the experimental analysis of behavior》2009,92(1):113-129
To meet an increasing need to examine the neurophysiological underpinnings of behavior in rats, we developed a behavioral system for studying sensory processing, attention and discrimination learning in rats while recording firing patterns of neurons in one or more brain areas of interest. Because neuronal activity is sensitive to variations in behavior which may confound the identification of neural correlates, a specific aim of the study was to allow rats to sample sensory stimuli under conditions of strong behavioral regularity. Our behavioral system allows multimodal stimulus presentation and is coupled to modules for delivering reinforcement, simultaneous monitoring of behavior and recording of ensembles of well isolated single neurons. Using training protocols for simple and compound discrimination, we validated the behavioral system with a group of 4 rats. Within these tasks, a majority of medial prefrontal neurons showed significant firing‐rate changes correlated to one or more trial events that could not be explained from significant variation in head position. Thus, ensemble recordings can be combined with discriminative learning tasks under conditions of strong behavioral regularity. 相似文献
795.
The aim of the work is to provide a language to reason about Closed Interactions, i.e. all those situations in which the outcomes
of an interaction can be determined by the agents themselves and in which the environment cannot interfere with they are able
to determine. We will see that two different interpretations can be given of this restriction, both stemming from Pauly Representation
Theorem. We will identify such restrictions and axiomatize their logic. We will apply the formal tools to reason about games
and their regulation. 相似文献
796.
Nanda N. J. Rommelse Marieke E. Altink Ellen A. Fliers Neilson C. Martin Cathelijne J. M. Buschgens Catharina A. Hartman Jan K. Buitelaar Stephen V. Faraone Joseph A. Sergeant Jaap Oosterlaan 《Journal of abnormal child psychology》2009,37(6):793-804
We aimed to assess which comorbid problems (oppositional defiant behaviors, anxiety, autistic traits, motor coordination problems,
and reading problems) were most associated with Attention-Deficit/Hyperactivity Disorder (ADHD); to determine whether these
comorbid problems shared executive and motor problems on an endophenotype level with ADHD; and to determine whether executive
functioning (EF)—and motor-endophenotypes supported the hypothesis that ADHD with comorbid problems is a qualitatively different
phenotype than ADHD without comorbid problems. An EF—and a motor-endophenotype were formed based on nine neuropsychological
tasks administered to 816 children from ADHD—and control-families. Additional data on comorbid problems were gathered using
questionnaires. Results indicated that oppositional defiant behaviors appeared the most important comorbid problems of ADHD,
followed by autistic traits, and than followed by motor coordination problems, anxiety, and reading problems. Both the EF—and
motor-endophenotype were correlated and cross-correlated in siblings to autistic traits, motor coordination problems and reading
problems, suggesting ADHD and these comorbid problems may possibly share familial/genetic EF and motor deficits. No such results
were found for oppositional defiant behaviors and anxiety. ADHD in co-occurrence with comorbid problems may not be best seen
as a distinct subtype of ADHD, but further research is warranted.
Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users. 相似文献
797.
The extent of the apparent visual field was determined for a group of 78 naïve visual observers. We find that there exists a minority (less than 10%) that is essentially veridical, but that the majority of the population experiences an apparent visual field of only about 90°, thus much narrower than the dioptrics of the eye would suggest (a little over 180°). This is in good accordance with available (albeit mainly anecdotal) evidence, though formal data have been lacking thus far. The finding is discussed in the context of metrical calibration of the topological structure of the visual field, an aspect of “local sign”. 相似文献
798.
799.
Jan De Houwer 《Social and Personality Psychology Compass》2009,3(1):36-48
Evaluation can be defined either as the process of determining the liking of an object or as responding in an evaluative manner to objects. It can be studied by examining the evaluative responses that objects evoke. After justifying these definitions and this approach to the study of evaluation, I present a brief overview of what is known about the variables that influence evaluative responding. Finally, I describe the Associative-Propositional Evaluation model as an example of a theory about the mental processes that are assumed to underlie evaluative responding. 相似文献
800.