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Comments on the paper by Möller et al. (1989): problems in single-case evaluation
1Psychologisches Institut IV, Universität Düsseldorf, Federal Republic of Germany.
Abstract:
Möller et al. (1989) investigated the effects of sleep deprivation on depressive patients using a single-case analysis based on Kleiter's 1986 approach. Here it is discussed why it is so difficult to perform single-case analyses and why Kleiter's approach in particular may lead to wrong interpretations of the data. It is indicated that any kind of single-case analysis is based on assumptions which possibly do not hold and that it is therefore always precarious to base substantial conclusions on this type of analysis.
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