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51.
Allocation of cognitive processing capacity during human autonomic classical conditioning 总被引:1,自引:0,他引:1
M E Dawson A M Schell J R Beers A Kelly 《Journal of experimental psychology. General》1982,111(3):273-295
In each of two experiments, allocation of cognitive processing capacity was measured in college-student subjects during autonomic discrimination classical conditioning. A 7.0-sec delay paradigm was used to establish classically conditioned responses to a reinforced visual conditioned stimulus (CS+). Electrodermal responses were the primary measures of autonomic classical conditioning. Allocation of processing capacity was measured by monitoring performance on a secondary reaction-time (RT) task. The auditory secondary-task RT signal was presented before, and 300, 500, 3500, 6500, and 7500 msec following CS onset. The RT signal was also presented following properly and improperly cued shock unconditioned stimuli (UCSs). Significant discrimination classical conditioning was obtained in both experiments. Comparison with control subjects who did not receive the RT signals indicated that the presence of the RT signals did not interfere with the development of classical conditioning. Four principal findings were obtained with the secondary-task RT measure. First, RTs to signals presented during CS+ were consistently slower than RTs to signals presented during CS-. This finding indicates that greater capacity allocation occurred during CS+ than CS- and is consistent with recent cognitive interpretations of classical conditioning. Second, the largest capacity allocation (i.e., slowing of RTs) occurred 300 msec following CS+ onset. This finding is consistent with the notion that subjects are actively processing the signal properties of the CS+ at 300 msec following CS+ onset. Third, presentation of the UCS when improperly cued (following CS-) significantly increased capacity allocation, whereas presentation of the same UCS when properly cued (following CS+) did not affect capacity allocation. These findings indicate that subjects were actively prepared for the UCS following CS+ but not following CS- and that a surprising UCS elicits greater capacity allocation than does an expected UCS. Fourth, large electrodermal responders to the CSs exhibited patterns of capacity allocation during the CSs, particularly during the CS+, different from those of small electrodermal responders. In particular, they exhibited significantly longer RTs at 300 msec after CS+ onset than did the small responders, followed by a shortening of RT at 500 msec relative to the small responders. This finding suggests that large electrodermal responders devote greater processing capacity to significant environmental stimuli than do small responders and that their processing may begin and be completed more rapidly. All in all, the data indicate the complexity of the cognitive processes that occur during human classical conditioning and the usefulness of the secondary-task technique in integrating conditioning theories and psychophysiology with cognitive psychology. 相似文献
52.
John L.M. Dawson 《International journal of psychology》1969,4(1):39-53
l'A. a conçu une théorie de la cohérence du changement d'attitude dans un contexte où coexistent culture traditionnelle et culture occidentale; il analyse conjointement les variables qui peuvent influencer le type et le degré du changement d'attitude. II décrit la construction de l'échelle T-O (Tradition-Occident) qu'il a utilisée et montre que les individus qui sont confrontés à un conflit de ce type tendent à résoudre la contradiction qui existe entre attitudes traditionnelles et attitudes occidentales par une réorganisation qui engendre des attitudes mi-traditionnelles, mi-occidentales qui sont plus appropriées et mieux adaptées. Les résultats montrent également que, conformément aux hypothèses, il y a davantage de conflit non résolu quand il s'agit d'objets d'attitudes traditionnelles à forte implication affective. 相似文献
53.
54.
Anthony Dickinson G. R. Dawson 《The Quarterly Journal of Experimental Psychology Section B: Comparative and Physiological Psychology》1989,41(1):99-112
Hungry rats were trained to press a lever and pull a chain concurrently, with one action being reinforced with a sucrose solution and the other with food pellets. In addition, in the first two experiments all animals experienced non-contingent presentations of the two incentives in the absence of the operant manipulanda while either thirsty or hungry and either before (Experiment 1A) or after (Experiment 1B) the instrumental training. When lever pressing was assessed subsequently in extinction under thirst, the animals pressed at a relatively high rate only if (1) this action had been reinforced with the sucrose solution rather than the food pellets during training and (2) they had received the non-contingent presentations of the sucrose solution and food pellets on days on which they were thirsty rather than hungry. A third experiment demonstrated that non-contingent exposure to the sucrose solution alone, but not to water under thirst was sufficient to bring about this type of motivational control of instrumental performance. 相似文献
55.
In the last two decades, there has been tremendous growth in two fields of study related to human infant development: (1) the development of neural processes during the early postnatal years and (2) the development of self-regulatory behavior. In an attempt to stimulate research on the relation between early brain development and self-regulatory processes, several hypotheses pertaining to the role of frontal lobe functioning in the development of emotion regulation during infancy are proposed. The results of a study of the relation between frontal electroencephalographic (EEG) activity and emotional behavior of 21-month-old infants are reported. It was found that increases in frontal lobe activation were associated with increases in emotional arousal, while EEG activity recorded from the parietal region showed either a reciprocal pattern of activation or did not change as a function of level of emotional arousal. These results provide evidence for the specialized role of the frontal lobe in mediating emotional behavior during infancy. 相似文献
56.
The use of maladaptive coping strategies following traumatic brain injury (TBI) is known to be associated with increased depression and a lower productivity status. What is not known is whether coping behaviours change following TBI and if they do change whether these changes account for significant variance in outcome. Seventy-three significant others of TBI survivors were recruited at the time their friend/family member was injured and followed prospectively. They reported on their friend/family member's pre-injury and 6-month coping behaviours using the Coping with Health Injuries and Problems Scale. The use of emotional pre-occupation coping (p = .02) increased significantly and approached significance for distraction coping(p = .08). These changes in coping also accounted for significant variance (22%, p = .02) in productivity status over and above that accounted for by demographics and injury severity. Whether maladaptive coping changes can be prevented with a view to improving outcomes is a question that now needs to be explored. 相似文献
57.
Evidence suggests that autism is associated with impaired emotion perception, but it is unknown how early such impairments are evident. Furthermore, most studies that have assessed emotion perception in children with autism have required verbal responses, making results difficult to interpret. This study utilized high-density event-related potentials (ERPs) to investigate whether 3-4-year-old children with autism spectrum disorder (ASD) show differential brain activity to fear versus neutral facial expressions. It has been shown that normal infants as young as 7 months of age show differential brain responses to faces expressing different emotions. ERPs were recorded while children passively viewed photos of an unfamiliar woman posing a neutral and a prototypic fear expression. The sample consisted of 29 3-4-year-old children with ASD and 22 chronological age-matched children with typical development. Typically developing children exhibited a larger early negative component (N300) to the fear than to the neutral face. In contrast, children with ASD did not show the difference in amplitude of this early ERP component to the fear versus neutral face. For a later component, typically developing children exhibited a larger negative slow wave (NSW) to the fear than to the neutral face, whereas children with autism did not show a differential NSW to the two stimuli. In children with ASD, faster speed of early processing (i. e. N300 latency) of the fear face was associated with better performance on tasks assessing social attention (social orienting, joint attention and attention to distress). These data suggest that children with ASD, as young as 3 years of age, show a disordered pattern of neural responses to emotional stimuli. 相似文献
58.
Theo L. Dawson 《The Journal of genetic psychology》2013,174(3):335-364
L. Kohlberg (1969) argued that his moral stages captured a developmental sequence specific to the moral domain. To explore that contention, the author compared stage assignments obtained with the Standard Issue Scoring System (A. Colby & L. Kohlberg, 1987a, 1987b) and those obtained with a generalized content-independent stage-scoring system called the Hierarchical Complexity Scoring System (T. L. Dawson, 2002a), on 637 moral judgment interviews (participants' ages ranged from 5 to 86 years). The correlation between stage scores produced with the 2 systems was .88. Although standard issue scoring and hierarchical complexity scoring often awarded different scores up to Kohlberg's Moral Stage 2/3, from his Moral Stage 3 onward, scores awarded with the two systems predominantly agreed. The author explores the implications for developmental research. 相似文献
59.
Yves R. F. Guillaume Jeremy F. Dawson Vincenza Priola Claudia A. Sacramento Stephen A. Woods Helen E. Higson 《European Journal of Work and Organizational Psychology》2013,22(5):783-802
The literature on policies, procedures, and practices of diversity management in organizations is currently fragmented and often contradictory in highlighting what is effective diversity management, and which organizational and societal factors facilitate or hinder its implementation. In order to provide a comprehensive and cohesive view of diversity management in organizations, we develop a multilevel model informed by the social identity approach that explains, on the basis of a work motivation logic, the processes by, and the conditions under which employee dissimilarity within diverse work groups is related to innovation, effectiveness, and well-being. Building on this new model, we then identify those work group factors (e.g., climate for inclusion and supervisory leadership), organizational factors (e.g., diversity management policies and procedures, and top management's diversity beliefs), and societal factors (e.g., legislation, socioeconomic situation, and culture) that are likely to contribute to the effective management of diversity in organizations. In our discussion of the theoretical implications of the proposed model, we offer a set of propositions to serve as a guide for future research. We conclude with a discussion of possible limitations of the model and practical implications for managing diversity in organizations. 相似文献
60.
In this study of the informativeness of shadows for the perception of object shape, observers viewed shadows cast by a set of natural solid objects and were required to discriminate between them. In some conditions the objects underwent rotation in depth while in other conditions they remained stationary, thus producing both deforming and static shadows. The orientation of the light source casting the shadows was also varied, leading to further alterations in the shape of the shadows. When deformations in the shadow boundary were present, the observers were able to reliably recognize and discriminate between the objects, invariant over the shadow distortions produced by movements of the light source. The recognition performance for the static shadows depended critically upon the content of the specific views that were shown. These results support the idea that there are invariant features of shadow boundaries that permit the recognition of shape (cf Koenderink, 1984 Perception 13 321-330). 相似文献