作者单位:Univ N Carolina, Dept Psychol, Chapel Hill, NC USA[1]Univ Maryland, Dept Family Sci, College Pk, MD 20742 USA[2]Univ Utah, Dept Psychol, 380 South 1530 East,Room 502, Salt Lake City, UT 84112 USA[3]Univ Calif Los Angeles, Dept Psychol, Los Angeles, CA USA[4]