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