What have the difference scores not been telling us? A critique of the use of self--ideal discrepancy in the assessment of body image and evaluation of an alternative data-analytic framework.

@article{Cafri2010WhatHT,
  title={What have the difference scores not been telling us? A critique of the use of self--ideal discrepancy in the assessment of body image and evaluation of an alternative data-analytic framework.},
  author={Guy Cafri and Patricia A van den Berg and Michael T. Brannick},
  journal={Assessment},
  year={2010},
  volume={17 3},
  pages={361-76}
}
Difference scores are often used as a means of assessing body image satisfaction using silhouette scales. Unfortunately, difference scores suffer from numerous potential methodological problems, including reduced reliability, ambiguity, confounded effects, untested constraints, and dimensional reduction. In this article, the methodological problems are outlined and an alternative framework is discussed. The alternative consists of a minimum of testing the constraints implied by the difference… CONTINUE READING

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