Four experiments studied effects of difficulty of word identification on optional conceptual processing by second, third, and fifth graders, and college students in a cued recall task. Results indicated that contrastive processing facilitates recall, and that difficulty of word identification may limit the extent of optional contrastive…

Identified groups of economically disadvantaged children showing high externalizing behavior in first grade that persisted (persistent) or decreased (improver) in third grade, or low first- grade levels that were stable (unproblematic) or increased (new problem) in third grade. Found that verbal ability, behavioral impulsivity, parent…