Alpert, R. & Haber, R.N.Anxiety in academic achievement situations. Journal of Abnormal and Social Psychology, 1960, 61, 207-215.
2.
Ferguson, E.D. Ego involvement: A critical examination of some methodological issues. Journal of Abnormal and Social Psychology, 1962, 64, 407-417.
3.
Ferguson, E.D.Relationship between ego-involvement instructions and various motivation and performance measures. Psychological Reports, 1971, 29, 547-556.
4.
Mandler, G. & Sarason, S.B.A study of anxiety and learning. Journal of Abnormal and Social Psychology, 1952, 47, 166-173.
5.
Sarason, I.G. & Palola, E.G.The relationship of test and general anxiety, difficulty of task, and experimental instructions to performance. Journal of Experimental Psychology , 1960, 59, 185-191.
6.
Stoudenmire, J.Effects of muscle relaxation training on state and trait anxiety in introverts and extraverts. Journal of Personality and Social Psychology , 1972, 24, 273-275.
7.
Taylor, J.A.A personality scale of manifest anxiety. Journal of Abnormal and Social Psychology, 1953, 48, 285-290.
