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Goodfellow, Marianne; And Others – Evaluation Review, 1988
This study assessed the nature of response bias in a two-stage data-collection design (telephone interviews followed by a questionnaire mailing), which was used to examine the effectiveness of a state-level pharmaceutical assistance program for the elderly. Demographic and health factors affecting response (N=1,705 elderly persons) are discussed.…
Descriptors: Data Collection, Demography, Health Conditions, Interviews