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83.
Barbara A. Mellers Virginia Richards Michael H. Birnbaum 《Organizational behavior and human decision processes》1992,51(3)
This paper examines theories of impression formation which represent stimulus information as distributions on subjective dimensions rather than points along a continuum. These theories explain why unfavorable information often overrides favorable information. Subjects were asked to imagine hypothetical persons described by single adjectives or adjective combinations and to estimate the probability that each person would have various degrees of likeableness. Three models were considered to describe how the likeableness distribution for the adjective combination depends on the distributions of the single adjectives. All three models assume that the mean of the distribution for the adjective combination is described by the equal probability criterion which, for symmetric distributions, implies a weighted average of the single adjective means with weights inversely proportional to their standard deviations. The models can be distinguished on the basis of the standard deviations of the adjective combinations. Estimated standard deviations of the single unfavorable adjectives were smaller than those for the single favorable adjectives. Furthermore, the standard deviation associated with an adjective combination tended to fall between the standard deviations of the single adjectives, consistent with the horizontal averaging model. 相似文献
84.
The present experiment was designed to test Eysenck's hypothesis that repeated exposure to an unreinforced CS of brief duration following acquisition of a classical aversive CR may lead to a progressive increase in the strength of that CR, provided that the UCS is intense and the CR has drive-like properties. Using a between-groups design, normal human subjects were given identical classical acquisition trials, followed by extinction trials where CS duration was either 2, 8 or 16 sec. The UCS was of fixed high intensity. Dependent measures were tonic and phasic heart rate and skin conductance. No evidence of incubation was found as a function of CS duration. Nor was there any indication that CS duration differentially affected resistance to extinction. A small number of subjects showed evidence of incubation with heart rate measures during extinction. However, there was no indication that this enhancement was governed by the parameters suggested by Eysenck. UCR amplitude, which showed a positive correspondence with CS-bound activity throughout the trials, did not reliably predict incubation. Problems concerning both the definition and the demonstration of incubation are discussed. 相似文献
85.
Richards RW 《Journal of the experimental analysis of behavior》1974,21(3):501-509
The key pecking of pigeons was reinforced according to a variable-interval 1-min schedule during each of two successively presented stimuli. When the key was illuminated by a black line on a white background, reinforcement was delayed for 10 sec. When the key was illuminated by a plain white light, reinforcement was not delayed. For half of the subjects, the delayed reinforcer was 4.0-sec access to mixed grain, and for the remaining subjects it was 1.5-sec access. The immediate reinforcer was 1.5-sec access for all subjects. All subjects responded at a lower rate during the presentation of the black line; no between-group difference in terms of terminal response rate during the presentation of the line was found. However, subjects that received 4.0 sec of delayed reinforcement responded at a lower terminal rate during presentation of the plain white light than subjects that received 1.5 sec of delayed reinforcement. A subsequent generalization test along the line-orientation dimension produced flatter U-shaped gradients for subjects that received 4.0-sec of delayed reinforcement. 相似文献
86.
Anxiety-related Stroop interference in adolescents 总被引:1,自引:0,他引:1
A group of 16- to 18-year-old students was presented with threat-related and neutral Stroop stimuli on separate cards. Participants were assigned to anxiety groups on the basis of their scores on the Beck Anxiety Inventory (BAI; A. T. Beck & R. A. Steer, 1990). It was found, as predicted, that the high-anxiety group took significantly longer to identify the color of the threat-related word than the neutral words, whereas there was no difference for the low-anxiety group. There was a significant linear relationship between interference on the task and BAI scores, showing that as anxiety increases there is a corresponding increase in interference produced by the threat-related stimuli when compared with the neutral stimuli. This study demonstrates an anxiety-related Stroop interference effect for adolescents consistent with that reported in the adult literature. 相似文献
87.
Burke V Richards J Milligan RA Beilin LJ Dunbar D Gracey MP 《Psychology & health》2000,14(6):1061-1075
Abstract This study investigated the validity of a Stages of Change algorithm with respect to independent measures of physical activity and fitness. dietary intake and alcohol consumption in 18 year-old Ausmlian men (n = 301) and women (n = 282). Stage of Change categories were related to fat and fibre intakes in men and fibre intake in women as well as hit and vegetable intakes in men and women. Physical activity and fitness for men and women also showed significant linear associations with Stage of Change categories. Alcohol consumption was significantly associated with Stage of Change categories for men but not for women although recorded alcohol consumption was very variable for women. However, the algorithm was valid for both men and women when drinking alcohol consistent with national guidelines on safe drinking was used. In summary, with reference to actual health behaviours, the Stages of Change algorithm was valid for young men and women for diet. physical activity and alcohol drinking. Independent behavioural data were not available for smoking behaviours. Using the algorithm, there were significant associations in men between prccontemplation status for diet and drinking and diet and physical activity, in women between diet and smoking and in both men and women between drinking and smoking. Covariance between precontemplation status for different health behaviours therefore suggests the need for multimodal interventions. 相似文献
88.
Lejuez CW Eifert GH Zvolensky MJ Richards JB 《Journal of experimental psychology. Applied》2000,6(4):349-358
Predictability of aversive events impacts the development and maintenance of anxiety, particularly panic disorder. Although animal studies typically have found a preference for signaled (predictable) over unsignaled (unpredictable) aversive events, results of research with human participants have been less clear. Using a panic-relevant paradigm, the authors examined predictability preference with humans as a function of anxiety sensitivity and gender during repeated administrations of 20% carbon-dioxide-enriched air. Participants preferred predictable administrations, with high-anxiety individuals showing greater preference than low-anxiety individuals and women showing greater preference than men. In addition to providing information to better understand human predictability preference for panic-related events, results also may aid in determining the applicability of predictability to the cognitive-behavioral treatment of panic disorder. 相似文献
89.
This study describes the development of the Tinnitus Stages of Change Questionnaire (TSOCQ), which aims to assess the readiness of tinnitus patients to change their behaviors and attitudes in relation to tinnitus. Its ability to predict treatment outcome was also investigated. One hundred and fifty-one patients with tinnitus completed the questionnaire. Through repeated principal component analyses, together with judgments of the factors' theoretical relevance, empirically and clinically meaningful scales were derived. A factor solution in accordance with the transtheoretical model (TTM) and with acceptable psychometric properties was found with the five scales of the TSOCQ labeled Precontemplation (Medical Solution), Precontemplation (Helplessness), Contemplation, Preparation and Action/Maintenance. Participants scoring high on Precontemplation (Helplessness) and low on Action/Maintenance had better treatment outcomes. In conclusion, the TSOCQ had some ability to predict treatment success, but further research is required into the utility of the TTM for understanding the rehabilitation process in tinnitus patients. 相似文献
90.
Research on metacognition often uses various kinds of paired-associate items (e.g., foreign language translation equivalents) to investigate judgments of learning (JOLs) under the assumption that the JOLs are made independently of each other. We tested this assumption by exploring the effect of manipulating the difficulty of prior Swahili-English translation equivalents to determine whether there is a contrasting change in the magnitude of the JOLs assigned to subsequent Swahili-English translation equivalents (e.g., intermediate-difficulty items might receive lower JOLs when following easy items than when following difficult items). The magnitude of JOLs for the subsequent items did not vary as a function of the difficulty of the prior items, even when there were 10 prior items of homogeneous difficulty that differed from the difficulty of the subsequent to-be-judged items. 相似文献