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…

Comparison of 149 deaf and 121 hearing college students on the Approaches to Studying Inventory found the impact of deafness relatively slight. Discriminant analysis indicated deaf students, especially those who preferred sign communication, had more difficulty with relating ideas on different topics although they were more likely to adopt a…

Suggests that secondary school students seem to have reasonably good procedural knowledge in areas of mathematics as rational numbers, probability, measurement, and data organization and interpretation. It appears, however, that students are lacking the conceptual knowledge enabling them to successfully do the assessment items on applications,…