Honors adviser, 1967-1973
Chair, Student Faculty Relations Committee, 1969-1970
Member, Undergraduate Curriculum Committee, 1970-1973
Preparation of Departmental Brochure, 1970-1971
Chair, Computer Liaison Committee, 1970-1973
Member, Computer Liaison Committee, 1974
Director, Undergraduate Research Participation Program, 1973
Member, Developmental Psychology Advisory Committee, 1972-1973
Member, Organization and Procedures Committee, 1973-1974
Member, Faculty Advisory Committee, 1974-1976, 1980, 1983-1986
Preparation of Evaluation and Promotion Guidelines, 1975
Member, Professional Concerns Committee, 1976-1977, 1979-1981, 1984-1986
Chair, Professional Concerns Committee, 1980-1981
Chair, Ethics Review Committee, 1977-1978
Coordinator of Graduate Studies, 1978-1979, 1989-1990
Library Liaison, 1980-1988, 1996-
Coordinator, General Experimental Psychology, Spring, 1981
Faculty Recruiting Committee, 1982-1983, 1986-1987, 1989-1994
Ad hoc Starch Professorship Committee, 1983-1984
Coordinator, Cognitive Psychology, 1986-1988
Graduate Studies Committee, 1986-1988, 1989-1994
Chair, 1989-1994
Coordinator, Undergraduate Studies, 1998-

Ethics Review Committee C, 1967-1968
Freshman Orientation, 1968
Iowa Night Program, 1968
High School Science Symposium, 1969
NSF Science Research Program, 1969
Computer-Based Education Advisory Committee, 1973-1974
College of Liberal Arts Mini-Computer Advisory Committee, 1973
Council on Teaching, 1973-1974
Pre-Medicine Advisor, 1976-1978
University House Advisory Committee, 1982-1986
Planning Committee, Second Annual Humanities Symposium, "Exploring the Concept of Mind," 1983-1985
External Review Committee for Department of Communication Studies, 1984-1985
Search Committee for University Librarian, 1985-1986
University Committee on Aging, 1986-1988, 1995-
Liberal Arts Faculty Assembly, 1989-91
Animal Care Unit Review Committee, 1990-
Search Committee for Associate Director of Belin Center, 1990-91
Iowa Board of Advisors, Project on Rhetoric of Inquiry, 1991-
Executive Committee, College of Liberal Arts, 1991-94
Chair, Task Force on Student Outcomes Assessment, 1991
Search Committee for Vice President for Health Sciences, 1993
Chair, University Strategic Planning Committee, 1994-97
Member, University Strategic Planning Steering Group, 1996-97
Member, University Re-Accreditation Steering Group, 1996-97
Chair, University Re-Accreditation Self-Study Committee, 1996-97
Member, Admissions Committee, College of Liberal Arts, 1998-
Member, 1998-99 Presidential Scholarship Selection Committee

Occasional Reviewer for Psychological Review, Science, Psychonomic Science, American Journal of Psychology, Journal of Experimental Psychology: Human Perception and Performance, Journal of the Acoustical Society of America, Memory & Cognition, Journal of Verbal Learning and Verbal Behavior, American Psychologist, Psychopharmacology, Cognition and Instruction, Journal of Experimental Psychology: Learning, Memory, & Cognition, Journal of Mathematical Psychology, Psychology and Aging, Journal of Pharmacology and Experimental Therapeutics, Journal of Mathematical Psychology, Journal of Experimental Psychology: General, Psychological Bulletin.

Occasional Reviewer for National Science Foundation, National Institute of Mental Health, and National Institute of Education.

Consulting Editor for Journal of Experimental Psychology: Human Learning and Memory, 1976-1980.

Consulting Editor for Journal of Experimental Psychology: Human Perception and Performance, 1979-1982.

APA Accreditation Site Visitor:
Department of Counseling Psychology, University of Nebraska, Lincoln, NE, March 1-2, 1990
Department of Psychology, University of Colorado, Boulder, December 11-12, 1995.
Department of School Psychology, Kent State University, Kent, OH, April 10-11, 1997.
Department of Counseling Psychology, Teachers’ College, Columbia University, NY, Oct. 8-9, 1997.
Department of Psychology, Vanderbilt University, Nashville, TN, March 30-31, 1998.
Department of Psychology, University of Minnesota, Minneapolis, MN, May 14-15, 1998