Conceptual, Methodological, and Ethical Problems of Placebo Groups in Psychotherapy Research
O'Leary, K. Daniel
Borkovec, Thomas D.
American Psychologist 1978 September; 33(9): 821-830
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Background Material for the Workshop on QALYs: Conceptual and Methodological Problems in Research on the Quality of Life in Clinical Medicine Siegrist, Johannes; Junge, Astrid (1989)This introductory paper discusses three issues: theory, validity of measurement and benefits of assessment. It is argued that the conceptual entity 'quality of life' remains ill-defined, although researchers commonly agree ...