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Psychophysical functions for perceived roughness, relating ln (magnitude estimate of roughness) to ln (groove width), were obtained for blind and sighted participants in virtual reality using the PHANToM force feedback device. The stimuli were sinusoidal surfaces with groove widths between 0.675 mm and 20.700 mm. Group functions showed a similar nonlinearity to those obtained in physical reality using rigid probes (Klatzky, Lederman, Hamilton, Grindley, & Swendsen, 2003; Lederman, Klatzky, Hamilton, & Ramsay, 1999). Individual functions gave a different picture. Of 23 total participants, there were 13 with wholly descending linear psychometric functions, 7 with quadratic functions similar to the group function, and 3 with anomalous functions. Individual power law exponents showed no significant effects of visual status. All analyses gave a power law exponent close to -0.80. The implications for theories of roughness, methodologies of data analysis, and the design of haptic virtual reality interfaces are considered. 相似文献
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Initial research suggested that only European American women developed eating disorders (Garner, 1993), yet recent studies have shown that African American women do experience them (e.g., Lester & Petrie, 1998b; Mulholland & Mintz, 2001) and also may be negatively affected by similar sociocultural variables. In this study, we examined a sociocultural model of eating disorders for African American women but included the influences of ethnic identity (e.g., Hall, 1995; Helms, 1990). Participants (N = 322) were drawn from 5 different universities. They completed measures representing ethnic identity, societal pressures regarding thinness, internalization of societal beauty ideals, body image concerns, and disordered eating. Structural equation modeling revealed that ethnic identity was inversely, and societal pressures regarding thinness directly, related to internalization of societal beauty ideals. Societal pressures regarding thinness was also related to greater body image concerns. Both internalization of societal beauty ideals and body image concerns were positively associated with disordered eating (R2 = .79). Overall, the final model fit the data well, supporting its generalizability and the importance of ethnic identity in determining risk. 相似文献
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D. E. Anderson R. L. Ray S. Lease G. E. Billman D. C. Randall O. A. Smith C. A. Astley D. F. Taylor J. S. Turkkan A. H. Harris O. J. Andy V. Read A. Cowley D. Peeler J. B. Cabot D. M. Goff D. H. Cohen Thomas J. Carew W. H. Bridger G. A. Barr G. T. Schimmel G. B. Glavin F. L. Royer S. A. Corson E. O. Corson R. A. Lanese R. M. Andrysco W. C. Stanley Sven O. E. Ebbesson M. E. Bitterman R. Bruce Masterton Richard F. Thompson Bernard Lown Delos D. Wickens Carol D. Wickens B. H. Natelson T. M. Poandl R. McCarty C. F. Knapp J. M. Evans W. Wilson F. Freemon T. Ban W. Petrie C. Clinton W. S. Middleton 《Integrative psychological & behavioral science》1980,15(2):82-90
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Patricia Petrie Kirby Brown Wayne C. Piersel S. Randall Frinfrock Marian Schelble Cobbie P. Leblanc Thomas R. Kratochwill 《Journal of School Psychology》1980,18(3):222-233
Some psychologists involved in the implementation of applied behavioral psychology in educational systems must increasingly attend to the ecological impact of such interventions. An ecological orientation emphasizing system-like interdependencies among environment, organism, and behavior suggests several substantial additions to conventional role functions of behavioral school psychologists. Such functions involve taking an active part in evaluating and assessing second-order consequences of behavioral interventions. Recommendations for functional and procedural changes are provided within this framework. 相似文献
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Few studies have investigated the possible influence of discrepancy between real and ideal perceptions of masculinity and femininity (i.e., gender discrepancy) on eating disorder behaviors and attitudes. Thus, this study examined the relationship of gender role discrepancy to bulimic and anorexic symptomatology, self-esteem, and concern about body shape in 178 female college students; the majority were Caucasian. Analyses revealed that women without a gender discrepancy reported fewer anorexic and bulimic symptoms, less concern with body shape, and higher self-esteem than those who were discrepant, particularly those desiring to be more masculine. Results are discussed with respect to current discrepancy theory, and directions for future research are provided. 相似文献
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This study examined the relationship of high school sport participation to psychological well-being and physical activity involvement in college. First semester female undergraduates (n?=?260) at a large public university in the southern United States reported their high school sport participation and completed a series of questionnaires assessing their current body image, physical competence, instrumentality, psychological well-being, and physical activity levels. Body image, physical competence, and instrumentality mediated the relationships between high school sport involvement and college well-being and level of activity. This model accounted for 46% of the variance in college physical activity and 60% in psychological well-being, suggesting that these benefits accrue as a result of changes in how women view themselves and their bodies. 相似文献
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Abstract The Illness Perception Questionnaire (IPQ) is a new method for assessing cognitive representations of illness. The IPQ is a theoretically derived measure comprising five scales that provides information about the five components that have been found to underlie the cognitive representation of illness. The five scales assess identity - the symptoms the patient associates with the illness, cause - personal ideas about aetiology, time-line - the perceived duration of the illness, consequences - expected effects and outcome and cure control - how one controls or recovers from the illness. The IPQ has a specific number of core items but allows the user to add items for particular patient groups or health threats. Data is presented supporting the reliability and validity of the IPQ scales in different chronic illness populations. 相似文献
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The purpose of this research project was to examine the effectiveness of supervised literacy tutoring delivered by 25 secondary teacher candidates to middle and high school students via webcam technology and in person. The results stem from two semester-long studies of technology-delivered tutoring from a university to middle and high school settings. Findings support the effectiveness of delivering literacy tutoring components through 18 one-hour tutoring sessions using webcam technology with secondary teacher candidates as instructors. In addition, the data revealed that there was no significant difference in the literacy growth among those students who received tutoring in person or via webcam technology. 相似文献