Methods drawn from four logical theories associated with studies of inductive processes are applied to the assessment and evaluation of experimental episode construct validity. It is shown that this application provides for estimates of episode informativeness with respect to the person examined in terms of the construct and to the construct definition itself. Example analyses are presented in which projective and objective tests of the achievement motive are evaluated in relation to a version of the theory of achievement motivation presented by Atkinson (1957). Results indicate why projective measures may be preferred. (Author)