Explores problems involved in the quantitative verification of independent variables in investigations of the effects on student outcomes of planned variations in instructional behavior. Specifically addresses (1) gathering of data through direct systematic observation, and (2) analysis of those data through the use of inferential statistics. (GC)

Employs a pragmatic philosophical perspective to argue that there is no incompatibility at either the level of practice or that of epistemology between qualitative and quantitative methods of educational research. (FMW)

Examines data analysis at three levels: analysis of data; secondary analysis is the re-analysis of data for the purpose of answering the original research question with better statistical techniques, or answering new questions with old data; and, meta-analysis refers to the statistical analysis of many analysis results from individual studies for…

Argues that G. A. Cziko's conclusions about the inadequacy of mainstream educational research result from misunderstandings of statistical method, philosophy of science, and other topics. Perceptual control theory, which he espouses, may contribute for educational research but its potential does not result from shortcomings of mainstream…