Hunt and Willoughby''s method of frustration proved inadequate; a new means of frustration was developed in which the goal of food was not removed entirely but was placed in a container where it remained the locus of the animal''s activity and tensions although completely inaccessible. The exptl. animals were 2 groups of 8 rats each, the "frustrates" and a control "deprivate" group. The groups were equated for hoarding before the frustration (or deprivation) period and were rescored afterward. The results showed a greater hoarding for the "frustrate" group after the period of frustration. The effects of learning, hunger motivation, and "frustration" on hoarding behavior are discussed.