“…As with child's sex, a number of investigators have reported interaction patterns in disturbed and normal families to be importantly influenced by social class (Alkire, 1969;Baxter & Arthur, 1964;Becker & Iwakami, 1969) and child's age (Ferreira, 1963a(Ferreira, , 1963bFerreira & Winter, 1968a;Murrell & Stachowiak, 1967). In addition, social class and child's age variables have been of continued importance to sociologists and to social and developmental psychologists in their theoretical and empirical attempts to clarify the nature of family relationships (Blood & Wolfe, 1960;Bowerman & Elder, 1964;Douvan & Adelson, 1966;Hess, 1970;Kohn, 1963;Maas, 1951;Scott, 1962;Strauss, 1967;Strodtbeck, 1958;Hess & Torney, Note 3). Although differences in social class and child's age would appear to seriously limit one's ability to make meaningful comparisons across studies, most of the empirical literature previously cited did not employ direct observation methods and/or did not systematically assess the effects of social class and child's age on family interaction patterns.…”