“…These tend to be markedly asymmetrical, with some younger siblings looking up to and modeling firstborns and firstborns rarely reciprocating (Tucker, Updegraff, McHale, & Crouter, 1999;Whiteman, McHale, & Crouter, in press). Finally, in some families, deidentifica-tionFthe tendency for some siblings to minimize competition by consciously or unconsciously choosing to be different than their sibling, is apparent (Feinberg & Hetherington, 2000;Schacter, Gilutz, Shore, & Adler, 1978;Sulloway, 1996). An analysis of the roles that these dynamics play in gender development is beyond the scope of this article, but we would urge researchers to take advantage of sibling comparative designs and to pay attention to the full range of potentially relevant family dynamics that may differentiate firstborns and laterborns.…”