“…However, a number of learning mechanisms for the development of cognitive skills in general have been proposed in the psychological literature, several of which have been cited in the second language literature as plausible explanations for the development of fluency. These include the mechanisms underlying the notion of automaticity as developed by Shiffrin and Schneider (1977) and applied to U learning by Levelt (1977) and by McLaughlin, Rossman, and McLeod (1983); the mechanisms of proceduralization, composition, generalization, discrimination and strengthening proposed in Anderson's ACP theory of cognition (Anderson, 1982(Anderson, , 1983); Bialystok's dimension of 11 COntrol" (Bialystok, 1990a(Bialystok, , 1990b; the notion of restructuring as developed by Cheng (1985) in psychology and applied to L2learning by McLaughlin (1990); recent proposals for the redefinition of automaticity as retrieval from memory, in both instance theory (Logan, 1988a(Logan, , 1991Logan & Stadler, 1991) and associative strength theories (MacKay, 1982;Schneider, 1985); and chunking theories (Newell, 1990;Servan-Schreiber & Anderson, 1990). I will discuss each of these proposals in turn, first presenting and explaining the theoretical constructs and the proposed learning mechanisms, next considering how the theory has been or could be applied in the field of SLA, and finally providing an evaluation of the proposed mechanisms in terms of both their current status within cognitive psychology and their relevance to our understanding of second language fluency and how it develops.…”