It is particularly gratifying to prepare a second edition of a book, because there is the necessary impli cation that the first edition was well received. Moreover, now an opportunity is provided to correct the problems or limitations that existed in the first edition as well as to address recent developments in the field. Thus, we are grateful to our friends, colleagues, and students, as well as to the reviewers who have expressed their approval of the first edition and who have given us valuable input on how the revision could best be structured. Perhaps the first thing that the reader will notice about the second edition is that it is more extensive than the first. The volume currently has 41 chapters, in contrast to the 31 chapters that comprised the earlier version. Chapters 3, 9, 29, and 30 of the first edition either have been dropped or were combined, whereas 14 new chapters have been added. In effect, we are gratified in being able to reflect the continued growth of behavior therapy in the 1980s. Behavior therapists have addressed an ever-increasing number of disorders and behavioral dysfunctions in an increasing range of populations. The most notable advances are taking place in such areas as cognitive approaches, geriatrics, and behavioral medicine, and also in the treatment of childhood disorders.

As a division of the School of Medicine at the University of North Carolina at ChapeI Hili, TEACCH has always been involved in the latest biological research on autism and related developmental disabilities. However, until now there has not been sufficient information to justify aseparate volume on this most important topic. Recent advances both in our under standing of the brain and in the technology to facilitate the measurement of neurological functioning have stimulated significant growth, which is reflected in this volume. As with the preceding books in this series, Current Issues in Autism, this volume is based on one of the annual TEACCH conferences held in ChapeI Hili each May. The books are not simply published proceedings of the conference papers, however. lnstead, conference participants are asked to develop chapters around their presentations, and other international experts whose work is beyond the scope of the conference, but related to the major theme, are asked to contribute as weil. These volumes are intended to provide the most current knowledge and professional practice available to us concerning major issues in autism.

An important component of Division TEACCH's mandate from the Department of Psychiatry of the University of North Carolina School of Medicine and the North Carolina State Legislature is to conduct research aimed toward improving the understanding of developmental disabilities such as autism and to train the professionals who will be needed to work with this challenging population. An important mechanism to help meet these goals is our annual conference on topics of special importance for the understanding and treatment of autism and related disorders. As with the preceding books in this series entitled Current Issues in Autism, this most recent volume is based on one of these conferences. The books are not, however, simply published proceedings of conference papers. Instead, cer tain conference participants were asked to develop chapters around their pres entations, and other national and intemational experts whose work is beyond the scope of the conference but related to the conference theme were asked to contribute manuscripts as weil. These volumes are intended to provide the most current knowledge and professional practice available to us at this time.

Prologue.- Chapter 1. Depressing Thoughts.- Chapter 2. Suicide and History.- Chapter 3. Suicide and Criminality.- Chapter 4. Suicide and Science.- Chapter 5. Distinguishing Differences.- Chapter 6. The Matter of Reporting.- Chapter 7. Mainstream Suicide.- Chapter 8. Aboriginal Suicide.- Chapter 9. The Matter of Rejection.- Chapter 10. The Matter of Prevention.- Chapter 11. A Matter of Economics.- Chapter 12. A Matter of Education.- Chapter 13. Kinds Hearts and Coroners.- Chapter 14. Reading Guide.- References.