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51.
Cognitive-behavioural models of social phobia (Clark & Wells, 1995; Rapee & Heimberg, 1997) propose that biased information processing contributes to the maintenance of social phobia. Given the importance of facial expressions in social interactions, recent investigations of these information-processing biases have increasingly used facial stimuli. The current study utilised schematic faces of emotional expressions to investigate interpretations of facial expressions and specific facial features in individuals with high and low social anxiety. Individuals with elevated social anxiety demonstrated biases in their perceptions of negative valence from the faces, whereas group differences were not observed for perceptions of activity or potency. Further, although the two groups generally utilised the same facial features to interpret facial expressions, the results suggested that individuals with high social anxiety may be more lenient in perceiving threat in faces than individuals without social anxiety. 相似文献
52.
Checking behavior is among the most common forms of compulsions in OCD. Recent research suggests that repeated checking decreases memory confidence, and supports theoretical models of how repeated checking is maintained. The current paper presents findings from two studies exploring the boundaries of memory distrust from repeated checking. Results of study 1 show that repeated checking of a real stove decreases memory confidence, vividness, and detail (i.e., metamemory), and leads to a greater reliance on knowing as a source of memory, without meaningfully altering memory accuracy. Results of study 2 suggest that these changes in metamemory are observed after performing a relatively low number of checks on one occasion. The findings are considered within the context of theoretical models of checking and future directions are delineated. 相似文献
53.
Studies using linguistic stimuli have provided little support for explicit memory biases among individuals with social phobia (SP). However, using facial stimuli rated on their criticalness, Lundh and Ost (1996) found that individuals with SP recognized more critical than accepting faces, whereas non-anxious controls tended to show the opposite pattern. Since the publication of Lundh and Ost's findings, additional studies using a variety of facial stimuli have produced inconsistent findings (J. Anxiety Disord. 14 (2000) 501; Behav. Res. Ther. 39 (2001) 967). Unfortunately, these inconsistencies are difficult to reconcile given great variation in methods and stimuli. Therefore, we designed a study to replicate and extend the work of Lundh and Ost (Behav. Res. Ther. 34 (1996) 787). Similar to Lundh and Ost, individuals with SP identified a significantly higher proportion of old critical faces as old than did non-anxious controls. Further, extending the work of Lundh and Ost, signal detection analyses revealed group differences on response bias according to face type. Specifically, controls showed a response bias towards indicating that accepting faces were previously seen, whereas individuals with SP did not. Finally, signal detection analyses failed to reveal group differences in the accuracy of memory. 相似文献
54.
A mechanism for error detection in speeded response time tasks 总被引:6,自引:0,他引:6
Holroyd CB Yeung N Coles MG Cohen JD 《Journal of experimental psychology. General》2005,134(2):163-191
The concept of error detection plays a central role in theories of executive control. In this article, the authors present a mechanism that can rapidly detect errors in speeded response time tasks. This error monitor assigns values to the output of cognitive processes involved in stimulus categorization and response generation and detects errors by identifying states of the system associated with negative value. The mechanism is formalized in a computational model based on a recent theoretical framework for understanding error processing in humans (C. B. Holroyd & M. G. H. Coles, 2002). The model is used to simulate behavioral and event-related brain potential data in a speeded response time task, and the results of the simulation are compared with empirical data. 相似文献
55.
OBJECTIVE: The present study was designed to investigate the psychophysiologic effects of "Applied Tension" (AT) on the emotional fainting response to blood and injury in a controlled experiment. METHOD: Twenty-two persons reporting to generally feel faint or to have fainted at the sight of blood or injury and 22 participants classified as Non-Fainters were randomly allocated to a treatment or control condition. Psychophysiologic responses were continuously monitored while individuals watched a video depicting open-heart surgery and a control film. Prior to the surgery film, participants in the treatment condition were instructed in the use of AT. RESULTS: All participants classified as Fainters showed a diphasic response pattern while watching the surgery film. This response, however, was significantly attenuated in Fainters in the treatment condition. CONCLUSIONS: These results suggest that AT provides an effective treatment strategy for the prevention of fainting responses in persons with a fear of blood and injury. 相似文献
56.
Recent studies indicate that subjects may respond to visual information during either an early parallel phase or a later focused phase and that the selection of the relevant phase is data driven. Using the noise-compatibility paradigm, we tested the hypothesis that this selection may also be strategic and context driven. At least part of the interference effect observed in this paradigm is due to response activation during the parallel-processing phase. We manipulated subjects' expectancies for compatible and incompatible noise in 4 experiments and effectively modulated the interference effect. The results suggest that expectancies about the relative utility of the information extracted during the parallel and focused phases determine which phase is used to activate responses. 相似文献
57.
This study assessed the physiological and cognitive effects of Valins' (Valins, S. Journal of Personality and Social Psychology, 1966, 4, 400–408) false heart rate procedure. Twenty-two male subjects were exposed to two feedback conditions during which measures of actual heart rate and skin conductance were obtained. In each condition, eight slides of nude females were presented; some slides were associated with false heart rate increases, while for other slides the feedback remained stable. In one condition, subjects were told that the heart rate was that of another subject; in the other condition, subjects were told that the feedback was their own heart rate. In both conditions, subjects judged the attractiveness of the slides from their own point of view and from the point of view of the other subject. Slides associated with false heart rate increases were rated as more attractive than stable slides when subjects (1) heard their own heart rate and rated their own attraction; (2) heard the other subject's heart rate and rated their own attraction; and (3) heard the other subject's heart rate and rated the other subject's attraction. Skin conductance responses and actual cardiac decelerations were greater when subjects heard what was allegedly their own heart rate and when the slides were accompanied by apparent cardiac acceleration. However, these actual physiological responses did not play a causal role in relation to the affective judgments. Instead, the relationship between perceived physiological changes and feelings of attractiveness was mediated by cognitive processes associated with informational and directive influences of the feedback. 相似文献
58.
Michael G.H Coles Sharon D Herzberger Brenda M Sperber Therese E Goetz 《Journal of research in personality》1975,9(2):168-176
Sixty human subjects were exposed to a mild auditory stress after a fixed anticipatory period during which they performed a reaction time task. Suspense subjects were correctly informed of the time of onset of stress; Surprise subjects were told to expect the stress 10 min. later than it actually occurred. Subjects were provided with elapsed time information either automatically or on demand. Suspence subjects showed larger anticipatory electrodermal responses and smaller responses to stress than Surprise subjects but the two groups did not differ in their ratings of the unpleasantness of the stress. Female subjects showed greater anticipatory responses and consistently slower reaction times than males. The data are discussed in terms of explanations of the negative preception effect. 相似文献
59.
Fournier, L. R., Eriksen, C. W. and Bowd, C. (1998. Multiple feature discrimination faster than single feature discrimination within the same object? Perception & Psychophysics 60, 1384-1405) found that judging the presence of multiple features within an object is faster than judging the presence of the least discriminable of these features alone (multiple feature benefits, MFBs). When an 'absent' response is required, responses are slower when some of the relevant (target) features are present (multiple feature costs, MFCs). The present study utilized psychophysiological measures (of the event-related brain potential and the electromyogram) to determine the contributions of response priming and stimulus evaluation processes (P300 latency) to these effects. P300 latency and reaction time (RT) both showed evidence of MFBs and MFCs. These findings suggest that MFBs and MFCs can be attributed to processing that occurs prior to response selection. No dissociations between P300 latency and RT measures were found for 'present' responses across the single and multiple feature judgements. However, for 'absent' responses, partial dissociations were found between these measures, and partial errors and longer response execution intervals were observed more often when an object contained some target features. These findings suggest that response priming contributes to MFCs, but may not contribute to MFBs. 相似文献
60.
Behavioral assessment tests (BATs) are commonly used in studies of social phobia (SP). While previous studies have examined subjective anxiety during BATs, they have usually reported only mean or peak ratings. The current study examined whether there are different patterns of anxious arousal in anticipation of, and during exposure to, feared situations among individuals seeking treatment for SP (N = 153). A four cluster solution was judged to best describe the data, and the four clusters were labeled 'high anxiety,' 'increasing/high anxiety', 'moderate anxiety' and 'mild anxiety'. Before treatment, the cluster groups did not differ on person characteristics, subtype of social phobia, or levels of depressive symptoms. However, they did differ in terms of the severity of social phobia symptoms and the emotional valence of thoughts reported at the conclusion of the BAT. While members of all clusters benefited from cognitive-behavioral group therapy for social phobia, the clusters showed some differential response in amount of symptom reduction and likelihood of continuing to meet diagnostic criteria following treatment. The different emotional experiences of clients in the various clusters are explored and implications for cognitive-behavioral therapy are proposed. Finally, limitations of this study and future directions are discussed. 相似文献