· American Psychological Society - Fellow

· American Psychological Association - Fellow 1969-2003

· Division 8: Personality and Social Psychology

· Division 9: Society for Psychological Study of Social Issues

· Division 34: Population and Environmental Psychology

· President, 1996-1997

· Society for Risk Analysis - 1970-2003

· Columbia - Cascades Chapter of the Society for Risk Analysis

· Founding President: 1989-1990

· International Social Science Group on Risk – founding member

· Brunswik Society

· Judgment and Decision Making Society

· International Association of Cross-Cultural Psychology 1970-2003

· International Association of Applied Psychology

· International Research Group on Risk and Risk Communication