Contents: E.A. Fleishman, Introduction. M.D. Dunnette, Critical Concepts in the Assessment of Human Capabilities. D.A. Bownas, N.G. Peterson, Skill and Task Structure and Performance Acquisition. F.A. Muckler, Evaluating Productivity. I.L. Goldstein, V.M. Buxton, Training and Human Performance. L.F. Schoenfeldt, Intra-individual Variability in Performance. B.M. Bass, Individual Capability, Team Performance, and Productivity. J.E. Hunter, F.L. Schmidt, Fitting People into Jobs: The Impact of Personnel Selection on National Productivity.