| Abstract: | The integration of formal operations in a lattice–INRC group structure was tested in young adults. For this purpose the equilibrium in balance, the combination of liquids and the conservation of motion tasks were employed. To test the possibility of differential integration because of differences in developmental history, the factors of education and sex were manipulated systematically. Thus, four groups were constituted of educated males, educated females, uneducated males, and uneducated females, forming a total of 40 subjects. The results revealed a consistent patterning of performance on the three tasks across groups and across subjects which is in disagreement with the Piagetian model. Education and sex were important factors in respect to formal thought attainment. A theory of formal thought spheres is formulated to account for the patterning obtained and the implications for further research discussed. |
