Physics education research (PER) has long used concept inventories to investigate student learning over time and to compare performance across various student subpopulations. PER has traditionally used normalized gain to explore these questions but has begun to use established methods from other fields, including Cohen's "d," multiple…

The study examined the relationship between probe and training conditions on performance of nine severely handicapped students on functional tasks in classroom and community settings. Findings led to the following recommendations to teachers: measures of student performance under natural or probe conditions should be evaluated in addition to…

This paper briefly explains the possible two-mode techniques of factor analysis, and discusses, in more detail, one two-mode technique--the Q-technique. The Q-technique may be useful when the researcher is interested in obtaining information about "types" of individuals with regard to certain variables. A concrete heuristic example is used to…

This text is designed to enable educators to design, conduct, and report research and evaluation in a way that transforms special education by addressing the needs of persons with disabilities as heterogeneous, cultural groups. The book explores ways to adapt those research methods to the special education context by providing a framework for…