The structure and validity of Guglielmino's Self-Directed Learning Readiness Scale (SDLRS) have been examined repeatedly. In 1979, Mourad and Torrance investigated the construct validity of the SDLRS in a study involving a random sample of 684 of the 1,500 students enrolled in the University of Georgia's Program on Gifted/Talented Education. In 1990, West and Bentley examined the fit of the eight-factor measurement model underlying the SDLRS in a study involving 439 teachers and administrators from elementary, middle, and high schools across Tennessee who had participated in a professional development program. In 1994, Straka studied the feasibility of using the SDLRS in Germany by testing it on a sample of 442 students at Bremen University. The findings of the three studies were considered independently and together, and technical problems of measuring self-directed learning readiness were discussed. The following recommendations were made: (1) further analyses with different samples, especially from different cultures, should be conducted; (2) the structural models should be differentiated; and (3) theory-based models, especially models derived from cognition and metacognition, should be used instead of labeling factor solutions. (Contains 14 references.) (MN)