Enumerate the Number of converging developments

These include:

1) A better definition of the unique developmental concepts that are applicable to infants and young children,

2) Finely detailed analyses of normal and abnormal brain development from experimental studies of nonhumans,

3) Major advances in neurodiagnostic techniques,

4) An expanding clinical and research literature on human developmental studies, and

5) An increase in societal attention to the needs of infants and young children, in part emphasised by preschool screening and intervention programs.