Retroactive Inhibition was first published in 1941. University of Minnesota Studies in Education, No. 1

This monograph is the first of a series intended to make available to workers in the field of education recent results of experimental psychology. The review of the literature is confined to studies published during the six years since the last review in the Psychological Bulletin. The material is discussed under eighteen headings (including Degree of Learning, Amount of Material, and Nature of Material).