Furthermore, the one large - scale study on the relationship between concrete operational thought and reading, reported by University of Northern Iowa professor of education Rheta DeVries more than a quarter of a century ago, found that measures of reading in children in the early school years were almost entirely unrelated to measures of
concrete operational reasoning on Piagetian tasks.
As they move through the
concrete operational stage (ages 7 - 11), during which categorizing activities and the earliest logical operations occur, the types of rules governing their play and the
reasons for following them change.