A Preliminary Search for Formal Operations Structures

In an attempt to evaluate Intercorrelations among tasks presumed to measure development of formal operations thought, sixtyrone fourth, fifth, and sixth graders were given three tasks in two sessions. The tasks were a diagnostic problemisolving task, PS, and two of Inhelder and Plaget's taiks: combinations of colored and colorless chemical bodies, CH, and correlations, CO. A low but consistent end significant correlation was obtained between PS...