Published online by Cambridge University Press: 07 November 2008
The present paper isolates certain domain-general cognitive processes involved in decision making and examines their instantiations in adult second language acquisition (SLA). After reviewing important differences between mature and immature cognition, I discuss the epistemological categories and concepts that underlie decision making. I then address decision making from the point of view of fallibility—for example, maladaptive biases that mediate learners' decisions—and I suggest that some impediments to success in SLA may be the result of mature domain-general decision making. The heuristic value of research in the area of decision making is emphasized.