The purposes of this article are, first, to argue that analyses based on level of treatment implementation can lead to biased estimates of treatment effects, and second, to discuss alternatives to this approach. (PN)

Considerations in conducting attitude surveys concerning bilingual education are discussed. An introductory section examines briefly the history of the controversy over bilingual education, legislative initiatives, and some previous opinion research. Specific kinds of information needs relating to public opinion are then noted and problems arising…

Measuring cognitive achievement gains in project evaluation is dealt with. This guide provides those concerned with project evaluation with the basic tools for conducting technically sound, interpretable evaluation studies. Exotic designs are avoided and five basic models which appear feasible to implement in real-world settings are focused on.…

The focus of future Follow Through research should be oriented toward showing what can be done in order to offer information to both federal and local planners on which systems of curriculum design, classroom management, and parent involvement appear to be most effective. To assure this goal, the issues of program efficacy and implementation…