Generalizing Mail SurveyInducement Methods: Population Interactionswith Anonymity and Sponsorship

Population specific interactions with mail survey response inducementtechniques have long been suspected as a source of variationin the reported effectiveness of mail survey inducement methods.This study investigated such interactions by use of a 2 x 2x 110 randomized block experimental design involving 23,350survey subjects. Highly significant, as well as substantialinteractions were found between population factors and manipulationsof survey sponsorship and anonymity assurance. Income level,education level, population flux, and regional sponsor loyaltieswere specifically linked to interactive effects with the experimentalmanipulations.