Empirical findings related to the development of a new measure of epistemological style are reported. After a review of available epistemological style inventories and individual item qualities, 93 items reflecting 7 epistemological styles were selected. The scale was administered to 222 college undergraduates and graduate students (102 males and 120 females). The seven scale scores were submitted to Varimax orthogonal rotation to distill common factors empirically. As hypothesized, the following three factors emerged: (1) naive realism, which accounted for the intercorrelation between dualism and logical positivism; (2) logical inquiry, comprising the scales of empiricism, rationalism, and thinking; and (3) skeptical subjectivism, pertaining to the interrelationships between relativism and metaphorism. Findings are discussed in terms of theoretical and practical implications for the classroom and for student development. One figure illustrates the tri-level cognitive period, and two tables display study findings. (SLD)