Measures of variability are successfully used in predictive modeling in research areas outside of education. This study examined how standard deviations can be used to address research questions not easily addressed using traditional measures such as group means based on index variables. Student survey data were obtained from the Organisation for…

This chapter outlines the theory of cost-benefit analysis and discusses its application to determining the cost-benefit of instructional development projects. Three types of applications are discussed: (1) descriptive applications of single projects; (2) predictive studies of proposed projects; and (3) comparative analysis of alternative projects…

Mounting pressure in the policy arena to improve teacher productivity either by improving signals that predict teacher performance or through creating incentive contracts based on performance--has spurred two related questions: Are there important determinants of teacher productivity that are not captured by teacher credentials but that can be…

Prediction of academic success in introductory psychology courses is useful for both students and teachers. Although scores on the major intellectually oriented standardized aptitude tests are often useful predictors of introductory psychology grades, these scores are frequently unavailable. When major standardized measures of general intellectual…