Within the conceptual framework provided by Koestler, a new measure of innovativeness, with items emphasizing association and bisociation, was constructed. 19 items were selected empirically to form the two subscales corresponding to the two hypothesized types. A heterogeneous sample of 249 individuals was used in validation. Two clearly defined orthogonally rotated factor dimensions were interpreted as describing quite accurately the postulated classification as advanced by Koestler and as furnishing evidence for the inventory's construct validity. Internal consistency estimates of reliability were high for both subscales. Validation efforts, including the assessment of relationships in natural and laboratory settings and correlations with other measures including measures of ability, are in progress.