The inheritance of maze-learning ability in rats, by E. C. Tolman -- A note on the genetic basis of spontaneous activity in the albino rat, by E. G. Brody -- The genetics of mouse behavior in novel situations, by G. E. McClearn -- Inheritance of avoidance conditioning in mice: a diallel study, by R. L. Collins -- Genetic aspects of learning and memory in mice, by D. Bovet, F. Bovet-Nitti, and A. Oliverio -- Since learned behavior is innate, and vice versa, what now? by W. S. Verplanck -- Traits revisited, by G. W. Allport -- Familial concordance by sex with respect to schizophrenia, by D. Rosenthal -- Heritability of personality: a demonstration, by I. I. Gottesman -- The inheritance of mental ability, by C. Burt -- Comparative psychological studies of Negroes and Whites in the United States, by R. M. Dreger and K. S. Miller -- Genetics and intelligence: a review, by L. Erlenmeyer-Kimling and L. F. Jarvik -- Intelligent testing, by A. G. Wesman -- Behavior genetics and individuality understood, by J. Hirsch -- The snark was a boojum, by F. A. Beach -- Critical periods in behavioral development, by J. P. Scott -- Of flies and men, by T. Dobzhansky.