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Facilitating Return Rates of Mailed Program Evaluation Questionnaires

the effectiveness of psychological services. One procedure often suggested for evaluating applied mental health programs is to compare clients’ post-treatment community adjustment to their adjustment prior to treatment (Erickson, 1975; Evenson, Sletten, Hedlund & Faintich, 1974; Hargreaves, McIntyre, Atkinson & Siegel, in press). Once it is determined that assessments of community behavior will be part of a mental health program evaluation, the development of an efficient and accurate method of obtaining client data from the community becomes crucial. It has been suggested that the mail questionnaire is an economical and reliable method for obtaining research information from individuals in the community (Simon, 1967). This method is being used more frequently in the social sciences because of the great savings in time, money and professional energy it affords over other forms of assessment such as personal interviews. Although the mailed questionnaire is a promising method for obtaining program evaluation information, this procedure also has