"Five roles are considered by which systematic, quantified field research can augment controlled laboratory experimentation in terms of increasing the validity of laboratory studies." Advocates that comparative psychologists should "take more initiative in designing, executing, and interpreting our experiments with regard to the natural history of…

This study focused on the processes occurring during the waiting period in delay of gratification situations. Sixty-four middle class preschool children chose between waiting for a preferred item and receiving a less desired item immediately. The items were of different classes, i. e., one food and one toy, and subjects waited with one, both, or…

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…