An unfolding model was selected for the scores on the Scale of Intellectual Development to take into account that, for stage-based instruments, agreement with a statement first increases as the student approaches the stage represented by the statement, then decreases as the student progresses beyond that stage. (Contains 21 references.) (Author)

Describes a development in computer technology called database management, presented in a model for student development. Although the type and amount of information for the database is flexible, suggests it provides an opportunity to apply existing educational principles on a wider basis to more students. (Author)