The results from the present study indicate that in a sample of psychotherapy patients, cooperative and less cooperative research subjects are distinguishable on a number of characteristics including background and psychotherapy variables. These results caution against generalizations based merely on cooperative participants. (Author)

Presents a series of arguments that emphasize the importance of comparatively evaluating psychotherapies with appropriate pharmacotherapy and pill placebo. The lack of a pill-placebo arm has rendered moot those studies that compared pharmacotherapy directly with psychotherapy because of the lack of an internal sample defining calibration with…

Methods are proposed and described for estimating the degree to which relations among variables vary at the individual level. As an example, M. Fishbein and I. Ajzen's theory of reasoned action is examined. This article illustrates the use of empirical Bayes methods based on a random-effects regression model to estimate individual influences…

Examined factors associated with research attrition in a long-term follow-up study (48 months). Researchers attempted to contact all randomized participants, not just those who completed treatment. The analyses deal primarily with refusal, the main reason for attrition. Short-term outcome did not predict refusal. The findings, if generalizable,…