Epstein (1974) claims evidence for regular two-year growth spurts in the development of brain and mind, a phenomenon he calls phrenoblysis. Unfortunately, repeated analysis of the data he presents as proof of his theory provides no support. (Author/RH)

In cross-cultural child development research there is often a need to translate instruments and instructions to languages other than English. Typically, the translation process focuses on ensuring linguistic equivalence. However, establishment of linguistic equivalence through translation techniques is often not sufficient to guard against…

Data from infants unable to complete experimental sessions were compared to those for whom there were complete data. Results suggest that the elimination of large numbers of infants may have a potentially biasing effect on reported data. (Authors)

Study is part of an ongoing research program whose cumulatime aim is to generate empirically validated hierarchical curriculum sequences in several basic skill areas appropriate to an early learning curriculum. (Author)