For Developments in higher-order cognitive processes (pgs 356-365), you have many choices!
1) Explain how the findings of Osherson and Marksman on reasoning with tautologies (a phrase or expression in which the same thing is said twice in different words) and contradictions supports Piagetian descriptions of formal operations.
2) Explain how improvements in adolescent reasoning, a higher-order cognitive process, might be explained in terms of either basic neurological developments or developments in basic cognitive processes.