“…Keating, 1975);Shayer, Kuchemann & Wylan, 1976) reported the gifted to be superior. The author and two of his colleagues (Carter & Ormrod, 1982;Carter & Kontos, 1982) reviewed these and other studies and concluded that the inconsistent results can be explained by the variability of the conditions across the studies. For example, different Piagetian tasks were used, age groupings varied, and sample size was often limited.…”