Empirically determines if two approaches, i.e., individual predictor information versus group information, would yield different predictive results, and since the second approach involved the additional expense of grouping whether the prediction of criterion measures by individual data could be enhanced by the addition of group data. (Author/RC)

Research tested the hypothesis that homogeneous subject groups would produce test responses with better homogeneity indices than those of the parent sample from which they were drawn. (Author)

Two years of observation of the behavior of visitors in several museums led to the knowledge of the degree of simplicity that is desirable in museum surroundings and of the need for pamphlets that are better prepared than the usual guide books and catalogs. It also led to the advice that museum directors become experimental psychologists, and that…