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RESEARCH IN DEVELOPMENTAL DISABILITIES
Johnny L. Matson, Ph.D., Editor-in-Chief
Department of Psychology Louisiana State University Baton Rouge, LA 70803-5501, USA
Stephen R. Schroeder, Ph.D., Co-E&or Institute for Life Span Studies 1052 Dole Human Development Center University of Kansas Lawrence, KS 66045, USA
Rowland Barrett, Ph.D. Brown University
Progmm in Medicine
Anthony Cuvo. Ph.D. Southern Illinoir Vnivcnify al carbolldak
Editmid Board
Martin Agnn, Ph.D. Utah Stare University
Michael Amao, Ph.D. The Nisonger Center, Ohio State University
Naman Ellis, Ph.D. Tuscdoosa. Alabama
Judith Favell, Ph.D. Western Carolina Center
Donald Ary. Ph.D. Nonhem Illinois University
Nathan Azrin, Ph.D. NOVA Vnticniry. Florida
Dcaald M. Baa, Ph.D. University of Kansas
Jay S. Bimbrauer, Ph.D. Murdoch Univeniry. Ausrmlia
David F&e. Ph.D. Mental Handicap in Wales-
Applied Research Unit
Riclwd M. Fox, W.D. Pennsylvmtia SIrrre Vniversiry
William I. Gardner, Ph.D. University of Wiscrm.rin 0, Madison
Edward Car. Ph.D. Srae University of New York at Stony Brook
Robert E. Crow, Ph.D. Louirirrno State University
Medical Center
C. Thomas Gualtieri. M.D. Nonh Carolina Memorial Hospital
Jan S. Handeman, Ph.D. Rutgers University
William Helsel. Fd.D. Western Carolina CenJer, North Crrmlina
I. P. Das, M.D. University of A/b&a, Canada
Robert H. Horner, Ph.D. University of Oregon
Brian Iwata. Ph.D. University of Florida
Pieter Duker, Ph.D. Ivar Lovaas, Ph.D. Karhdieke Universireit Unikcrsity of California. Nikmegan. The Nerherkmdr Los Angeles
T. J. Glabn, Ph.D. Behavior Resource Center,
Summerland. CA
Sandra L. Harris, Ph.D. Rutgers Vniversiry
James E. Martin. Ph.D. University ~Colomdo. Colorado springs
Jama A. Mulick, Ph.D. sopvare Editor 7he Ohio State University
F. Charles Mace, Ph.D. Rutgers University
Rknnarf Melin, Ph.D. Vntiersiry of Vppsala Sweden
ichard Morris, Ph.D. University of Arizom
Thomas Ollendic!.r, Ph.D. Virginia Polytechnic Institule
Dennis H. Reid, Ph.D. We&m Carolina Center, Noah Carolina
Steven R&s. Ph.D. Columbus, Ohio
Fraok R. Rush. Ph.D. Vnivcrsiry of
Illi?i0is-champoign
Michael Rut&r, M.D. Institute of Psychiatry. L4mdcm
Carolyn Schroeder, Ph.D. Chapel Hill Pediatrics,
No& Carolina
A. K. Sen. Ph.D. Delhi University, India
Edward Shapiro, Ph.D. Lehigh University
JoInones Rojahn, Ph.D. University ofPittsburgh Schwl of Medicine Nirhhay Sir&, Ph.D. hfedicd College of Virginia
Paul Smeets, Ph.D. Rijksuniversifeif re Leideq
HOfl&Vld
Lawrence T. Stoddard, Ph.D. Eunice Kennedy Shriver
Centerfor Menkll
RekZ&rion
Travis Tborrpsoo, Ph.D. Vanderbilt University
Sandra Twudosz, Ph.D.
The University of Tennessee
Rw Van Houtcm, Ph.D. Mount St. Vincent University,
CaMda
David P. Wacker, Ph.D. The University Hospital School,
lowrr
Steven F. Warren, Ph.D. Peabody College of Vanderbilt University
John S. Way. M.D. Auckland New Zcdand
Thomas Whkman, Ph.D. Vniveniry of Notre Dame
Edward Zigler, Ph.D. Yale Universiry
Production Editor: Jeannine Kelsey Tocco. Pergamon Press Inc., Tanytown, New York.
Editorial ON&: Johnny L. Matson, Ph.D., Department of Psychology, Louisiana State University, Baton Rouge, LA 70803- 5501, USA.
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