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61.
The apparent heaviness of a set of 40 cylindrical objects was scaled by the method of magnitude estimation. The objects varied in weight, volume. and density. There were three main conclusions: (1) For any constant volume, heaviness grows as a power function of weight; the larger the volume. the larger the exponent of the power function. The family of such power functions converge at a common point in the vicinity of the heaviest weight that can be lifted. (2) For any constant density (i:e., weight proportional to volume), heaviness does not grow as a power function of weight. (3) For any constant weight, heaviness decreases approximately as a logarithmic function of volume; the constants of the log function depend systematically on the weight of the object. The outcome furnishes a broad quantitative picture of apparent heaviness and of the size-weight illusion (Charpentier’s illusion). 相似文献
62.
The integration of women into the military, mandated by legislation in 1976, was problematic at first; several studies suggested that women were not welcomed by their colleagues. Peer acceptance is an important issue for the Coast Guard, since female officers are not officially discriminated against in duty assignments. Results of this current study, which assessed whether or not male Coast Guard cadets' attitudes have changed over time, suggest that males have become more tolerant of the idea of women in the military, and especially, that male cadets' perception of their female peers becomes more positive over time. The results are discussed in terms of Festinger's cognitive dissonance theory.This article is a revision of a paper presented at the 92nd annual meeting of the American Psychological Association, Toronto, Canada, August 1985. 相似文献
63.
40 subjects were randomly assigned to conditions of high pleasure, low pleasure, high anger, or low anger in a 2 x 2 (intensity x affect) design. Although subjects used highly intense cognitions more than less intense ones, pleasant cognitions produced higher tolerance for pressure pain. Modification of pain may be mediated by specific affect rather than intensity or consumption of attention. 相似文献
64.
K. Asen R. Stein A. Stevens B. McHugh J. Greenwood A. Cooklin 《Journal of Family Therapy》1982,4(4):345-358
The Family Day Unit at the Maryborough Hospital, London, carries out an intensive treatment programme for highly dysfunctional families. Up to ten families attend the Unit five days per week from nine a.m. to three p.m. They stay for a period of at least three months and not longer than fifteen months. Normally some twenty to thirty patients, adults and children, attend every day. This paper gives the reasons for setting up this Family Day Unit. The aims and structure of the Unit are described, the treatment method outlined and some preliminary results are discussed. 相似文献
65.
It is possible to generate cross-modality matching functions by having subjects make magnitude estimates of sets of stimuli appropriate to different modalities. The sets are interspersed among each other in the same test session and judged on a common absolute scale of sensory magnitude. An appropriate statistical device locates stimulus levels that appear, on the average, to match. The method is fast, efficient, circumvents the need for continuous stimulus adjustment, and holds promise for the study of the individual as well as the average psychophysical function. To illustrate its potential uses, advantages, and limitations, we used the method to generate cross-modality matching functions relating loudness and brightness. Compared to the scales of loudness and brightness generated by the magnitude estimations of the same stimuli, the matching functions (1) conform better to power functions, (2) may show less variation in slope (exponent), and (3) show far less variation in absolute magnitude (position). 相似文献
66.
67.
S. S. Stevens 《Attention, perception & psychophysics》1969,6(4):251-256
Mashhour and Hosman used magnitude estimations to scale seven continua: line length, time duration, finger span, loudness of noise, weight, gray reflectance, and surface area. The first four continua also served as the adjusted stimuli in 17 cross-modality matches among the various continua. Contrary to the view expressed by Mashhour and Hosman, the results appear to support the psychophysical power law. A reanalysis of the data shows that the exponents of the power functions obtained in cross-modality matches agree with the exponents of the power functions produced by magnitude estimations, provided correction is made for the regression effect. The measured discrepancies between the exponents predicted and those actually obtained show scatter that is consistent with that of other experiments. In particular, the scatter accords well with the distribution of 68 exponents predicted by Moskowitz from experiments in which Os matched both number and loudness to various taste concentrations. 相似文献
68.
The apparent hardness and softness of nine samples of compliant materials were scaled by direct magnitude estimation and by cross-modal matches to the apparent force exerted on a hand dynamometer and a finger dynamometer, and to the loudness of a band of white noise. The physical hardness (force/indentation) of the compliant specimens covered a range of more than 100 to 1, extending from a fairly soft sponge to a fairly hard block of rubber. The apparent hardness of the specimens was found to follow the psychophysical power law. Subjective hardness grows as the physical hardness raised to a power. The indicated exponent was about 0.8 for magnitude estimation, about 0.7 derived by calculation from handgrip matches, and about 0.6 derived by calculation from loudness matches.
Numerical estimates and cross-modal matches for softness gave functions that were approximately the reciprocal of the functions given for hardness. Hardness is a continuum on which there exists an upper threshold. 相似文献
Numerical estimates and cross-modal matches for softness gave functions that were approximately the reciprocal of the functions given for hardness. Hardness is a continuum on which there exists an upper threshold. 相似文献
69.
70.
Joseph C. Stevens 《Attention, perception & psychophysics》1967,2(5):189-192
The amount by which the apparent brightness of a visual field is inhibited by a surrounding field depends on the area of the inhibiting field. Interocular brightness matches showed that, as the size of a surrounding annulus is increased from a thin ring, the degree of inhibition on the brightness of an inner disk increases rapidly at first and then more slowly as the effect approaches an asymptote. The increase of the inhibition with size of annulus can be expressed as an increase in the exponent of the power function that relates the apparent brightness of the dish to its physical luminance. 相似文献