In recent years, researchers have shown interest in errors that can frustrate teaching, training, and learning. A discussion of the form an overall theory of error might take is presented in a comparatively discursive and nonrigorous way. Thirty-two references are listed. (Author/CHC)

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…