1. KARON, B. P. , and ALEXANDER, I. E.'A Practical Modification of Kendall's Tau for Measuring Association in Non-equivalent Ordered Categories.'Psychometrika (in press).
2.
2. LEWIN, K.'Psychology of Success and Failure.'Occupations, 1936, Vol. 14, pp. 926-930 .
3.
3. LEWIN, K. , DEMBO, T. , FESTINGER, L. , and SEARS, P. S.'Level of Aspiration.' In J. McV. Hunt (Ed.), Personality and the Behavior Disorders. New York: Ronald , 1944, pp. 333-378.
4.
4. LURIE, W. A.'Estimating the Level of Vocational Aspiration.'J. soc. Psychol., 1939, Vol. 10, pp. 467-473 .
5.
5. MACHT, L. B. 'An Application of the Resultant Weighted Valence Theory of Level of Aspiration to the Study of Occupational Preference.' Unpublished undergraduate thesis, Princeton University, 1957.
6.
6. ROE, A.The Psychology of Occupations. New York: Wiley , 1956.
