The mathematical derivation of the statistics used for inference in some linear models assumes that the values of the independent variables are measured without error. This assumption is often disregarded when these models are utilized in research. This study is an investigation of the consequences of the violation of this assumption for one…

Describes a study conducted in 1988 that investigated book availability in an academic library by providing a quantitative measure of library performance based on outcomes of card catalog searches and that can serve as a model for ongoing assessment in the library. Results are compared with earlier research from 1986. (Contains 12 references.)…

Presents five simulation models reflecting sequential levels of children's simple arithmetic story problem solving skills. Outputs of the models are compared with data obtained by presenting 60 five- to eight-year-olds with change problems to examine models' deterministic nature. Results indicate the models give an adequate description of behavior…

Reports on a study of the information searching behavior of 35 high school students. Problems that the students had searching an online catalog are identified, and implications for instruction are considered. (EAM)