“…The favored sibling would be the one likely to experience guilt toward or contempt for the disfavored brother or sister who, in turn, is likely to experience feelings of anger, resentment, and jealously toward the favored sibling (Angel, 2006;Brody, 1998). Disparities in parents' affection for and warmth toward different children in the family, and differences in how restrictive and punitive parents are toward each child, have been shown to undermine the quality of the sibling relationship during childhood and adolescence and to provoke hostile, coercive, and frequent conflict between siblings (Boer, Goedhart, & Treffers 1992;Brody, Stoneman, & McCoy, 1992;Feinberg, Reiss, Neiderhiser, & Hetherington, 2005;McHale, Crouter, & McGuire, 1995;McHale et al, 2000). Rauer and Volling (2007), who studied 200 young adults aged 18-22 years, reported that parental differential affection was strongly related to feelings of jealousy toward one's sibling.…”