1. ADLER, D. L., and KOUNIN, J. S."Some factors operating at the moment of resumption of interrupted tasks."J. Psychol., 1939, 7, 255-267.
2.
2. ALLPORT, G. W."Catharsis and the reduction of prejudice."J. soc. Issues, 1945, 1, No. 3, 3-10.
3.
3. BARNARD, C. I.The Functions of the ExecutiveCambridge: Harvard University Press, 1938.
4.
4. BAVELAS, A. Unpublished report delivered at Topological Meetings, Cranbrook, Michigan, 1947.
5.
5. BEEBE-CENTER, J. G.The Psychology of Pleasantness and Unpleasantness. New York: D. Van Nostrand, 1932.
6.
6. CARTWRIGHT, D."The effect of interruption, completion, and failure upon the attractiveness of activities."J. exp. Psychol., 1942, 31, 1-16.
7.
7. ESCALONA, S."Play and substitute satisfaction." In Barker, R. G., Kounin, J. S., Wright, H. F. (eds.), Child Behavior and DevelopmentNew York: McGraw-Hill, 1943.
8.
8. FESTINGER, L., et al. Theory and Experiment in Social Communication. Ann Arbor: University of Michigan, 1950.
9.
9. FRENCH, J. R. P."Group productivity." In Guetzkow, H. (ed.), Groups, Leadership, and MenPittsburgh: Carnegie Press, 1951.
10.
10. FRIEDMAN, M."Use of ranks to avoid the assumption of normality implicit in the analysis of variance."J. Amer. statist. Assoc., 1937, 32, 675-670.
11.
11. HOMANS, G. C.The Human GroupNew York: Harcourt, Brace, 1950.
12.
12. HORWITZ, M., and LEE, F. J."Effects of decision-making on motivational processes in group members." In preparation. (Abstract, Amer. Psychologist, 1952, 7, No. 7.)
13.
13. KATZ, D."Morale and motivation in industry." In Dennis, W. (ed.), Current Trends in Industrial PsychologyPittsburgh: Univ. of Pittsburgh, 1949.
14.
14. LEEPER, R.Leivin's Topological and Vector PsychologyEugene, Oregon: Univ. of Oregon, 1943.
15.
15. LEWIN, K."The conceptual representation and the measurement of psychological forces."Contr. psychol. Theory,1938, 1, No. 4, Durham. North Carolina: Duke Univ. Press.
16.
16. LEWIN, K.Field Theory in Social ScienceCartwright, D. (ed.) Chs. I, X. New York: Harper, 1951, and London, Tavistock Publications, 1952
17.
17. LEWIN, K.Principles of Topological PsychologyNew York: McGraw-Hill, 1936.
18.
18. LEWIS, H. B."An experimental study of the role of the ego in work, I. The role of the ego in cooperative work."J. exp. Psychol., 1944, 34, 113-127.
19.
19. LEWIS, H. B., and FRANKLIN, M."An experimental study of the role of the ego in work II. The significance of task orientation in work."J. exp. Psychol., 1944, 34, 194-215.
20.
20. LIPPITT, R."An experimental study of authoritarian and democratic group atmospheres."Studies in Topological and Vector Psychology, I. Univ. Iowa Stud. Child Welf, 1940, 16, No. 3.
21.
21. MILLER, N. E."Experimental studies of conflict." hnJ. McV. Hunt (ed.), Personality and the Behavior DisordersNew York: Ronald, 1944.
23. ROSENZWEIG, S."The recall of finished and unfinished tasks as affected by the purpose with which they were performed."Psychol. Bull., 30, 698 (abstract), 1933.
24.
24. SHERIF, M.The Psychology of Social NormsNew York: Harper, 1936.
25.
25. SHERIF, M., and CANTRIL, H.The Psychology of Ego-involvementsNew York: Wiley, 1947.
26.
26. SNEDEOOR, G. W.Statistical MethodsAmes, Iowa: Collegiate Press, Iowa State College, 1937.