Methodological problems associated with treatment research on cigarette smoking are explored, and possible solutions are discussed. The main problems considered are the selection and retention of subjects, the measurement of smoking, the design of treatment studies, and the interpretation and generalizability of experimental results. (Author)

Describes common methodological inadequacies in research on treatment of obesity and suggests alternatives. Importance of multiple measurement of outcome is emphasized. Merits of alternative single-subject and between-groups experimental designs are discussed. Reasons for conspicuous lack of long-term follow-ups are analyzed. Recommendations for…

Presents a speculative model for predicting differential rates of therapeutic change. From a review of 52 comparative psychotherapy studies, certain hypothesized relationships between the characteristics constituting the model and a variety of psychological treatment procedures were assessed. Use of the model for generating and guiding research is…