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71.
A perceived event such as a visual stimulus in the external world and a to-be-produced event such as an intentional action
are subserved by event representations. Event representations do not only contain information about present states but also
about past and future states. Here we focus on the role of representing future states in event perception and generation (i.e.,
prospective coding). Relevant theoretical issues and paradigms are discussed. We suggest that the predictive power of the
motor system may be exploited for prospective coding not only in producing but also in perceiving events. Predicting is more
advantageous than simply reacting. Perceptual prediction allows us to select appropriate responses ahead of the realization
of an (anticipated) event and therefore, it is indispensable to flexibly and timely adapt to new situations and thus, successfully
interact with our physical and social environment. 相似文献
72.
73.
Psychologists' perceptions of their duty to protect uninformed sex partners of HIV-positive clients.
The purpose of the present study was to determine whether mental health professionals would breach the confidentiality of HIV-infected patients with uninformed sex partners, and how any such disclosure would occur. Subjects read one of eight vignettes that depicted a patient who refused to disclose his viral status. Results revealed a split of opinion about breaching confidentiality and about the preferred mode for doing so. Neither diagnosis nor mode of viral transmission significantly influenced breaching decisions. Subjects demonstrated a high level of AIDS risk knowledge but only a moderate level of legal/ethical knowledge. Implications of these findings are discussed. 相似文献
74.
Follow-up evaluation was conducted of 101 older men and women (mean age = 67 +/- 5 years) who had participated in a randomized study of physiological and psychological effects of aerobic exercise. Eighty-five subjects completed the follow-up evaluation, and almost all of them (94%) reported continuing with physical activity, as assessed by a self-report measure. Total energy expenditure was calculated as an indicator of exercise maintenance, and energy expenditure at follow-up was predicted from measures of physiological functioning, psychological well-being, and cognitive functioning obtained at the conclusion of the structured exercise program. Greater cardiorespiratory endurance, faster psychomotor speed, and lower anxiety predicted exercise behavior at follow-up, accounting for 13% of the variance in exercise behavior. Gender was not a significant predictor of exercise behavior. 相似文献
75.
Gert Ten Hoopen Gerard Van Meurs Simone Akerboom 《Attention, perception & psychophysics》1982,31(3):256-260
Previous research has demonstrated that a sequence of tones that is alternated between ears is stretched out in echoic memory, as compared with monaural sequences. Although the stimulus onset asynchronies (SOAs) were the same in the interaural and monaural conditions, the perceptual onset asynchronies (POAs) differed by 24 msec. The present study investigated whether an analogous perceptual phenomenon exists for frequency-alternating tone sequences. It turned out that the POAs of coherent and even of streaming tone sequences were precisely the same as with nonalternating tone sequences. 相似文献
76.
Previous research demonstrated, by means of a reaction time technique, that there is no difference between the perceptual onset asynchronies (POAs) of nonalternating tone sequences and of frequency-alternating tone sequences, even if the latter are streaming. This finding implies that listeners are capable of extracting the tempo of the total alternating sequence, even though successive tones belong to different streams. The present study investigated whether subjects are also capable of establishing the tempo of one stream. To this end, listeners were required to match the rate of one stream by adjusting the rate of a nonalternating comparison stream (a pulse sequence). In addition, they were required to match the total rate of the streaming sequence. It turned out that the total tempo could be matched precisely and that the tempo of one stream could be approximated very closely. 相似文献
77.
In most of the literature on human performance the results of an experiment by Leonard (1959) are quoted as the most outstanding example of perfect S-R-compatibility. In that experiment the fingertips were stimulated by a 50 Hz vibration; the vibrating armature had to be depressed and the reaction times of the right index finger were recorded. The reaction time was found not to increase with an increasing number of tactual choices. In experiment 1 of the present study, also applying 50 Hz vibrations, the reaction times of other fingers were also reported. In addition the response stimulus interval (RSI) was varied. Leonard's results were not replicated: reaction time increased with the number of tactual choices at all levels of RSI. In experiment 2 the frequency and amplitude of vibration were systematically varied and it turned out that these variables could account for the differences between the results found. An increase in reaction time with the number of tactual choices was found with weak vibrations, but not with strong vibrations. The differences in reaction time patterns appeared to be caused by differences in tactile receptor systems (i.e. the non-Pacini versus the Pacinian system). It was concluded that the concept of S-R-compatibility did not cover the pattern of results but that the concept of ideomotor compatibility did. 相似文献
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80.
Carlos R. X. Cançado Josele Abreu‐Rodrigues Raquel Moreira Aló Flávia Hauck Adam H. Doughty 《Journal of the experimental analysis of behavior》2018,109(1):176-193
The effects of the response–reinforcer dependency on resistance to change were studied in three experiments with rats. In Experiment 1, lever pressing produced reinforcers at similar rates after variable interreinforcer intervals in each component of a two‐component multiple schedule. Across conditions, in the fixed component, all reinforcers were response‐dependent; in the alternative component, the percentage of response‐dependent reinforcers was 100, 50 (i.e., 50% response‐dependent and 50% response‐independent) or 10% (i.e., 10% response‐dependent and 90% response‐independent). Resistance to extinction was greater in the alternative than in the fixed component when the dependency in the former was 10%, but was similar between components when this dependency was 100 or 50%. In Experiment 2, a three‐component multiple schedule was used. The dependency was 100% in one component and 10% in the other two. The 10% components differed on how reinforcers were programmed. In one component, as in Experiment 1, a reinforcer had to be collected before the scheduling of other response‐dependent or independent reinforcers. In the other component, response‐dependent and ‐independent reinforcers were programmed by superimposing a variable‐time schedule on an independent variable‐interval schedule. Regardless of the procedure used to program the dependency, resistance to extinction was greater in the 10% components than in the 100% component. These results were replicated in Experiment 3 in which, instead of extinction, VT schedules replaced the baseline schedules in each multiple‐schedule component during the test. We argue that the relative change in dependency from Baseline to Test, which is greater when baseline dependencies are high rather than low, could account for the differential resistance to change in the present experiments. The inconsistencies in results across the present and previous experiments suggest that the effects of dependency on resistance to change are not well understood. Additional systematic analyses are important to further understand the effects of the response–reinforcer relation on resistance to change and to the development of a more comprehensive theory of behavioral persistence. 相似文献