THE theory of evolution is still the essential thread which connects together the numerous and diverse branches of biology. It has been clear at least since von Baer's day that a theory of evolution ...

Historically, the study of cognition has focused mainly on adults. With the arrival of constructivist theoreticians such as Jean Piaget, cognitive developmental theory became more visible in ...

This article has two purposes. First, it integrates the underlying principles of developmental systems theory (Ford & Lerner, 1992; Lerner, 2002, 2004) with the most recent research on immigrant youth ...