This monograph originated as an interim report on the research project Cog- nitive and Social Determinants on Language Acquisition which I conducted under the auspices of the German Department of the University of Frankfurt from September 1971 until the end of 1976. Since November 1972 this project was financed by the Max-Planck-Institut fur Bildungsforschung in Berlin as part of the research project Elternhaus und Schule conducted by Oevermann, Krappmann,...