Comments on the paper by Möller et al. (1989): problems in single-case evaluation.
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.
Krauth
J
J
Psychologisches Institut IV, Universität Düsseldorf, Federal Republic of Germany.
D015982:Bias; D003866:Depressive Disorder / Q000523:psychology / Q000628:therapy*; D006801:Humans; D015233:Models, Statistical; D011594:Psychometrics; D012892:Sleep Deprivation