[1] Purdue Univ, Dept Human Dev & Family Studies, W Lafayette, IN 47907 USA
[2] Univ Bologna, Dept Psychol, Bologna, Italy
[3] Aging & Disabil Resource Ctr Kenosha Cty, Kenosha, WI USA
[4] Univ Wisconsin, Inst Aging, Madison, WI USA
[5] Univ Wisconsin, Dept Psychol, 1202 W Johnson St, Madison, WI 53706 USA