A description is provided of a computer-based simulation of an instructional system which adapts the learning environment to the individual's unique attributes for processing information and for being motivated. The main purposes of the simulation are: 1) to introduce, as attributes for individualizing instruction, information processing variables with their associated reinforcement contingencies; 2) to model the learning environment resulting from the adaptation of instruction based on such attributes; and 3) to specify a computer-based adaptive instructional model which selects treatments dimensioned on the attributes of information processing variables and which provides for the control and monitoring of learning. The simulation is part of an overall effort to apply the results of psychological research to educational needs. Phase one of this effort simulates a learning environment based on knowledge gathered from 1) cognitive psychology and 2) from the experimental analysis of behavior. The second stage will involve a review of the relationship of these two areas and of individual differences useful in adaptive instruction, while the final phase will attempt an empirical evaluation of the simulation. (Author/PB)