A study evaluated experimentally a technology education program designed to provide mastery experiences described in Bandura's self-efficacy theory (1986) and predicted to improve career decision making. Seventh graders (n=97) and eighth graders (n=72) were stratified on grade level and randomly assigned either to a commercially published technology education program with self-efficacy components or to control curricula. Over 7 weeks, the experimental program attempted to foster exploration and performance accomplishments in the students' choice of 3 out of 21 possible technical and scientific careers. Pre- and posttest instruments assessed technical/scientific self-efficacy and career interest. Three separate MANOVAs showed no treatment effects were found, possibly because students in the experimental group were allowed to choose modules that might reflect their own interests, thus influencing their favorable ratings of the program. (Contains 37 references.) (YLB)