The present edition of this book is a revision and expansion of the first two editions which appeared in 1980 and 1985, and in German translation in 1991. More than half of the present volume includes new material, and what has been retained from the former editions has been largely rewritten and updated with new research findings. A completely new chapter has been added on "Attention Deficit Disorder. " The author of the earlier editions (W.H.G.) has been joined by a coauthor (D.E.), and their combined elementary, high school, and university teaching and clinical experience totals...