1. School of Family Life, Brigham Young University, Joseph F. Smith Building Rm 2086, Provo, UT 84602, USA
2. Department of Human Development and Family Studies, Utah State University, 2905 Old Main Hill, Logan, UT 84322, USA
3. Department of Psychology and Neuroscience, Dalhousie University, Life Sciences Centre Rm 3263, 1355 Oxford St., Halifax, NS B3H 4R2, Canada