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‘Demand Characteristics' in Body-Size Estimation in Anorexia Nervosa

Published online by Cambridge University Press:  29 January 2018

Linda Proctor  and
Stephen Morley
Linda Proctor
Affiliation:
The Drummond Clinic, Mill Road, Bury St Edmunds, Suffolk
Stephen Morley*
Affiliation:
Department of Psychiatry, University of Leeds, 15 Hyde Terrace, Leeds LS2 9LT
*
∗Correspondence
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Abstract

We asked 24 patients with anorexia nervosa and 30 normal controls to estimate their body-size several times, each time using different instructions. The degree of over-estimation was found to vary predictably with the wording of the instructions. Informing the subject that she had made an error without specifying the direction of the error resulted in reduced over-estimation on a subsequent trial, for both anorexics and controls. ‘Internally directed’ instructions were associated with a greater degree of over-estimation than ‘external’ instructions in both groups, but particularly in anorexic subjects. Our results indicate the necessity of controlling the ‘demand characteristics' of such experiments.

Type
Papers
Information
The British Journal of Psychiatry , Volume 149 , Issue 1 , July 1986 , pp. 113 - 118
Copyright
Copyright © 1986 The Royal College of Psychiatrists 

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References

Button, E. J., Fransella, F. & Slade, P. D. (1977) A reappraisal of body perception disturbance in anorexia nervosa. Psychological Medicine, 7, 235–243.Google Scholar
Crisp, A. H. & Kalucy, R. S. (1974) Aspects of the perceptual disorder in anorexia nervosa. British Journal of Medical Psychology, 47, 349–361.Google Scholar
Feighner, J. P., Robins, E., Guse, S. B., Woodruff, R. A., Winokur, G. & Munoz, R. (1972) Diagnostic criteria for use in psychiatric research. Archives of General Psychiatry, 26, 57–73.CrossRefGoogle ScholarPubMed
Finn, J. D. (1974) A General Model for Multivariate Analysis. New York: Holt, Rinehart & Winston.Google Scholar
Garfinkel, P. E., Moldofsky, H., Garner, D. M., Stancer, H. C. & Cosina, D. V. (1978) Body awareness in anorexia nervosa: Disturbances in “body image” and “satiety”. Psychosomatic Medicine, 40, 487–497.CrossRefGoogle ScholarPubMed
Garner, D. M. & Garfinkel, P. E. (1981) Body image in anorexia nervosa: Measurement, theory and clinical implications. International Journal of Psychiatry in Medicine, 11, 263–284.Google Scholar
Norris, D. L. (1984) The effects of mirror confrontation on self-estimation of body dimensions in anorexia nervosa, bulimia and two control groups. Psychological Medicine, 14, 835–842.CrossRefGoogle ScholarPubMed
Orne, M. T. (1969) Demand characteristics and the concept of quasi-controls In Artefact in Behavioural Research (eds Rosenthal, R. & Rosnow, R. L.) New York: Academic Press.Google Scholar
Pierloot, R. A. & Houben, M. E. (1978) Estimation of body dimensions in anorexia nervosa. Psychological Medicine, 8, 317–324.Google Scholar
Slade, P. D. & Russell, G. F. M. (1973) Awareness of body dimensions in anorexia nervosa. Cross-sectional and longitudinal studies. Psychological Medicine, 3, 188–199.Google Scholar
Szmukler, G. (1984) Body image disturbances in anorexia nervosa. British Journal of Psychiatry, 144, 553.CrossRefGoogle ScholarPubMed
Touyz, S. W., Beumont, P. J. V., Collins, J. K., McCabe, M. & Jupp, J. (1984) Body shape perception and its disturbance in anorexia nervosa. British Journal of Psychiatry, 144, 167–171.Google Scholar
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