... HANDBOOK OF PRESCHOOL MENTAL HEALTH Development, Disorders, and Treatment Edited by JOAN L LUBY THE GUILFORD PRESS New York London © 2006 The Guilford Press A Division of Guilford ... States of America This book is printed on acid-free paper Last digit is print number: Library of Congress Cataloging-in-Publication Data Handbook of preschool mental health : development, disorders, ... problems of mental health, they are acquiring new forms of self-awareness and social understanding, are striving to understand and manage their emotions, and their psychological development is profoundly...