“…First, in accordance with social learning theory (Mischel, 1966), a series of studies has shown that laterborns model their behavior after their older siblings, assuming sex-typed qualities similar to those of their sisters or brothers (Bigner, 1972;Brim, 1958;Greenfield & Weatherley, 1986;Koch, 1960;Rosenberg & Sutton-Smith, 1964, 1968Sutton-Smith & Rosenberg, 1965, 1970. Along these lines, two studies that examined the relationship between sibling sex constellation and older adolescents' interaction styles found some support for a modeling hypothesis (Greenfield & Weatherley, 1986;Ickes & Turner, 1983). Based on a study of college-aged students with older versus younger opposite-sex siblings, Ickes and Turner (1983) reported that males who had older sisters displayed more expressive qualities (e.g., initiated more conversation, asked more questions) in dyadic interactions with an unknown member of the opposite sex.…”