This study traces the controversy over the classification of children according to their ability from its origins in the development of the mental testing movement after 1916. The campaign to organize the schools largely on the basis of standardized tests of intelligence drew substantial support after 1920 from the development of research bureaus…

A Bayesian Model II approach to the estimation of proportions in m groups is extended to obtain posterior marginal distributions for the proportions. The approach is extended to allow greater use of prior information than previously and the specification of this prior information is discussed. (Author/RC)

The expected reliability of a multiple choice test is maximized by the use of three alternative items. (Author)

Many conservation studies have been performed using time consuming individual testing. The sequential studies reported in this paper describe the development of a group film test of conservation. (Author)

The educational and statistical validity of grading schemes is often open to question when multiple evaluation techniques are used. A method of scaling is proposed and discussed in relation to normal scores. (SD)

Studies the role that interactions play in predicting academic performance of kindergarten children who were follow studied into the first grade. (Author/DEP)

Paper presented at the International Seminar on Experimental Research in Music Education (University of Reading, Reading, England, July 9-16, 1968).