Arguing that understanding what lies behind the apparent usability of direct manipulation style interfaces might not only help in building better interfaces, but can also draw attention to possible side effects, this paper uses examples from a prototype data manipulation system to pursue a characterization of direct manipulation interfaces as…

This paper describes a study to determine whether students can, with appropriate instructional materials, develop and apply a knowledge of art concepts. An opening section reviews research on concept acquisition. This study utilized a concept acquisition model developed in 1970 by R. Gagne. Gagne's model proposed that concepts are learned through…