The validity of the computer-based language test is possibly affected by three factors: computer familiarity, audio-visual cognitive competence, and other discrepancies in construct. Therefore, validating the equivalence between the paper-and-pencil language test and the computer-based language test is a key step in the procedure of designing a…

Multisite trials, in which individuals are randomly assigned to alternative treatment arms within sites, offer an excellent opportunity to estimate the cross-site average effect of treatment assignment (intent to treat or ITT) "and" the amount by which this impact varies across sites. Although both of these statistics are substantively…

Several conceptual issues in the theory of evaluation methodology are discussed and illustrated. Four objectives are to: (1) narrow the distinction between research and evaluation; (2) extend the scope of triangulation and multimethods; (3) approach the problem concretely with extended data and interpretations; (4) structure the discussion in…

In evaluation, the whole is greater than the sum of the parts when quantitative and qualitative approaches and methods are combined. Some circumstances in which both approaches can be effectively combined are considered, and case studies of two evaluations using multiple methods are presented. (LMO)