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11.
Psychophysical judgment, like all other kinds of judgment, involves a matching or equating of two different domains. When the judgment involves the matching of values on two perceptual continua, the observer tends, on the average, to constrict the range of his adjustments on whichever variable is placed under his control. When the observer adjusts each variable in turn, two different regression lines are produced. This regression effect presumably occurs whenever the results of the matching judgments yield less than a perfect correlation. Illustrative examples are given for the continua, loudness, vibration, brightness, and duration. 相似文献
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The present studies assessed the degree of stimulus control exerted by S+ and S? without confoundings of stimulus novelty and stimulus ambiguity. In Experiment 1, rats were trained on two intercurrent simultaneous discrimination problems with nine times more training given on one than the other. Then the animals were given transfer tests with re-paired stimuli. The results showed that S? exerts greater stimulus control than S+ in a two-choice simultaneous discrimination. Experiment 2 provided a test of the possibility that the relative degree of control by S? varies with different amounts of training. Three groups were trained on two intercurrent simultaneous discrimination problems; each group was given 7, 11, or 15 times more training on one problem than the other. Then transfer tests were given with re-paired stimuli. Again the results showed that S? exerts greater stimulus control than S+ in a two-choice simultaneous discrimination. 相似文献
14.
Steven W. Zucker Kent A. Stevens Peter Sander 《Attention, perception & psychophysics》1983,34(6):513-522
The Gestalt studies demonstrated the tendency to visually organize dots on the basis of similarity, proximity, and global properties such as closure, good continuation, and symmetry. The particular organization imposed on a collection of dots is thus determined by many factors, some local, some global. We discuss computational reasons for expecting the initial stages of grouping to be achieved by processes with purely local support. In the case of dot patterns, the expectation is that neighboring dots are grouped as a function of proximity and similarity of contrast, by processes that are independent of the overall organization and the various global factors. We describe experiments that suggest a purely local relationship between proximity and brightness similarity in perceptual grouping. 相似文献
15.
Kent A. Stevens 《Attention, perception & psychophysics》1983,33(3):241-250
Surface slant (the angle between the line of sight and the surface normal) is an important psychophysical variable. However, slant angle captures only one of the two degrees of freedom of surface orientation, the other being thedirection of slant. Slant direction, measured in the image plane, coincides with the direction of the gradient of distance from viewer to surface and, equivalently, with the direction the surface normal would point if projected onto the image plane. Since slant direction may be quantified by the tilt of the projected normal (which ranges over 360 deg in the frontal plane), it is referred to here assurface tilt. (Note that slant angle is measured perpendicular to the image plane, whereas tilt angle is measured in the image plane.) Compared with slant angle’s popularity as a psychophysical variable, the attention paid to surface tilt seems undeservedly scant. Experiments that demonstrate a technique for measuring apparent surface tilt are reported. The experimental stimuli were oblique crosses and parallelograms, which suggest oriented planes in 3-D. The apparent tilt of the plane might be probed by orienting a needle in 3-D so as to appear normal, projecting the normal onto the image plane, and measuring its direction (e.g., relative to the horizontal). It is shown to be preferable, however, to merely rotate a line segment in 2-D, superimposed on the display, until it appears normal to the perceived surface. The apparent surface tilt recorded in these experiments corresponded closely to that predicted by assuming the 3-D configurations consist of equal-length lines and perpendicular intersections. 相似文献
16.
This study examined the differential evaluation of male and female stimulus cues and the effect of subject's androgyny level on their evaluations. Male and female college students filled out the Bem Sex Role Inventory (1974) and responded to set of five in-basket tasks taken from the Rosen, Jerdee, and Prestwich (1975) study of male managers. Sex of subject, sex of stimulus cue in the in-basket tasks, and androgyny level were varied in a series of 2 X 2 X 3 analyses of variance. On some tasks, male and/or female subjects responded in a sex role stereotyped manner. There were no effects for androgyny level. The discussion focused on circumstances under which stereotyping occurs and implications of the study. 相似文献
17.
Cameron J. Camp Jean W. Foss Ann M. O'Hanlon Alan B. Stevens 《Applied cognitive psychology》1996,10(3):193-210
It is possible to design effective, pragmatically useful memory interventions for persons with Dementia of the Alzheimer's Type (DAT). A review of successful memory interventions for such populations is presented. A particularly effective intervention technique, spaced-retrieval, is described and the theoretical basis for its effectiveness is discussed. A detailed account is presented of a spaced-retrieval intervention in which persons with DAT are trained to learn and utilize a strategy, i.e., remembering to use a calendar listing daily activities. Directions for future research in this area are offered. 相似文献
18.
Doidge N Simon B Brauer L Grant DC First M Brunshaw J Lancee WJ Stevens A Oldham JM Mosher P 《Journal of the American Psychoanalytic Association》2002,50(2):575-614
To determine the demographics, DSM-III-R disorders diagnosed, indications used in recommending psychoanalysis, previous treatment histories, use of medication, and length of treatment in patients in psychoanalysis in the U.S., Canada, and Australia, a mail survey of practice was sent to every other active member of the American Psychoanalytic Association and every member of the Australian Psychoanalytical Society. This supplemented an earlier survey sent to all Ontario psychoanalysts. The response rates were 40.1 % (n = 342) for the U.S., 67.2% (n = 117) for Canada, and 73.9% (n = 51) for Australia. Respondents supplied data on 1,718 patients. The employment rate for patients increases as analysis progresses (p < .0001). The mean number of concurrent categories of disorders (Axis I, Axis II, and Disorders First Evident in Childhood) per patient at the start of treatment is 5.01 (SD = 3.66; median = 4; mode = 3). There are no statistically significant differences across countries. Mood, anxiety, sexual dysfunction, and personality disorders are most common. American Psychiatric Association / American Psychoanalytic Association peer review criteria for indicating psychoanalysis are followed for 86.5% of patients. Over 80% of patients in all three countries had undergone previous treatments prior to analysis. In the U.S., 18.2% of analysands are on concurrent psychoactive medication; in Australia, 9.6%. The mean length of analyses conducted in the U.S. is 5.7 years, in Australia 6.6, and in Canada 4.8. Psychoanalytic patients in all three countries have similar rates of DSM-III-R psychopathology, and many indications of chronicity. 相似文献
19.
In this article, the authors assessed whether continuously scaled symptom parameters derived from growth models (T. M. Piasecki et al., 2003) are linked to smoking at long-term follow-up by using data from a large-scale clinical trial (N = 893). Results revealed that higher withdrawal intercepts, positive linear slopes, and greater volatility were all positively associated with relapse, and cigarette coefficients (indicating smoking-induced withdrawal reduction) were negatively related to relapse. In models keyed around the first lapse to smoking, those destined to lapse reported more severe withdrawal during abstinence, and withdrawal patterns discriminated groups defined according to lapse duration. The findings complement earlier heterogeneity studies in implicating the pattern of changing withdrawal symptoms over time as a factor strongly associated with smoking relapse. 相似文献
20.
Prenatal exposure to alcohol may lead to a range of neurobehavioral effects, including impaired learning and memory. Although children with fetal alcohol spectrum disorders (FASD) exhibit both verbal and nonverbal memory impairments, their memory for faces has not been as thoroughly investigated and the extent literature provides inconsistent results. The aim of the current study was to determine whether difficulties in face memory exist in children with FASD and whether the difficulties are mediated by task demands. To address this, we used two measures of immediate and delayed facial recognition memory, the Children's Memory Scale (CMS) and Test of Memory and Learning (TOMAL). Compared to typically developing controls, children with FASD showed memory deficits on all tests and were more likely to perform in a clinically significant range. As well, children performed more poorly on the CMS compared to TOMAL, a finding consistent with the greater difficulty of the CMS task. Our results are consistent with our hypothesis that children with FASD show impairment in facial memory, particularly on demanding memory tasks. 相似文献