All mathematical feature selection techniques can be classified into one of two major categories--feature selection in the measurement space and feature selection in the transformed space. This article discusses the various feature selection techniques in the light of this two-category classification. (Author/HB)

A manipulandum-referenced taxonomy for response categories appropriate to primary education is presented. The tenability of automatic on-line evaluation of the different types of response when processing equipment of the sort that probably will be available to Southwest Regional Laboratory is preliminarily evaluated. (Author/SK)

Reports on students' study and drawing of five electronic circuit diagrams. Concludes that the success of the students depended upon the amount of detail in the instructional diagrams. (RT)