“…The approach has been very successful in the field of motor performance and motor development in which mathematically rigorous methods have been used (Thelen, 1995a(Thelen, , 1995bThelen & Smith, 1994;Tnrvey & Fitzpatrick, 1993). However, other domains of development have also been the subject of dynamic systems theory formation and model building: language and communicative development (Elman, 1995;Fogel, 1993;FOgel & Thelen, 1987;McCune, 1995;Ruhland & van Geert, 1998;Sera & Smith, 1987;Smith & Sera, 1992;van Geert, 1991van Geert, , 1993van Geert, , 1995b, cognitive development in general (Bogartz, 1994;Case & Okamoto, 1996;Cooney & Troyer, 1994;K. W. Fischer & Bidell, 1997;Kreindler & Lumsden, 1994;Lewis, 1994Lewis, , 1996Rabinowitz, Grant, Howe, & Walsh, 1994;Smith, 1997;Thelen, 1995b;Thelen & Smith, 1994;van der Maas, 1993;van der Maas & Molenaar, 1992;van Geert, 1991van Geert, , 1993van Geert, , 1994avan Geert, , 1994bvan Geert, , 1995b, and social and emotional development (Camras, 1992;Eckerman & Stein, 1990;Fogel, 1993;Fogel, Nwokah, Dedo, & Messinger, 1992;Fogel & Reimers, 1989;…”