A properly chosen test model defines the kind of dependence of the observable behavior on underlying abilities of the persons tested in the form of a data-adequate theory. The limitations and potential of several test models are detailed; and they are critically compared as an aspect of empirical evaluation. (Author/MV)

Research sought to develop a quantitative model for the prediction of learning effects of a bilingual children's educational television program. The stimulus program series consisted of 30 sessions of Carrascolendas, a Spanish-English series which was based on specified behavioral objectives and aimed at students through grade 2. Learning effects…