Holroyd, K.A., Westbrook, T., Wolf, M., & Badorn, E. (1978). Performance, cognition, and physiological responding in test anxiety. Journal of Abnormal Psychology, 4, 442-451.
Morris, L.W., & Liebert, R.M. (1969). Effects of anxiety on timed and untimed intelligence tests: another look. Journal of Consulting and Clinical Psychology,
Sarason, I.G. (1984). Stress, anxiety, and cognitive interference: reactions to tests. Journal of Personality and Social Psychology, 4, 929-938.