Cultural-historical activity theory (CHAT), founded on the seminal work of Vygotsky and evolving in the subsequent work of Leont'ev and Engestrom, continues to emerge as a robust and increasingly widely used conceptual framework for the research and analysis of the complex social mediation of human learning and development. Yet there remains…

Kaplan (1964) describes the now classic distinction between "logic-in-use," the more or less logical cognitive style and procedures used by the educational scientist, and "reconstructed logic," the scientist's after-the-fact, explicit formulation and idealization of the logic and procedures. However, most technical documents…

This report of an ongoing research project intended to provide computer assistance to Army units for the scheduling of training focuses on the feasibility of simulated annealing, a heuristic approach for solving scheduling problems. Following an executive summary and brief introduction, the document is divided into three sections. First, the Army…

The assumption that people exert considerable cognitive effort in processing incoming information has been complemented in recent years by the idea that people often perform tasks and make decisions after only minimal information processing. Although both the heuristic and systematic conceptualizations of information processing share the…