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Lavelle TL, Metalsky GI, Coyne JC. Learned helplessness, test anxiety, and acknowledgment of contingencies. J Abnorm Psychol. 1979;88(4):381-7doi: 10.1037//0021-843x.88.4.381.
Lavelle, T. L., Metalsky, G. I., & Coyne, J. C. (1979). Learned helplessness, test anxiety, and acknowledgment of contingencies. Journal of abnormal psychology, 88(4), 381-7. https://doi.org/10.1037//0021-843x.88.4.381
Lavelle, T L, et al. "Learned helplessness, test anxiety, and acknowledgment of contingencies." Journal of abnormal psychology vol. 88,4 (1979): 381-7. doi: https://doi.org/10.1037//0021-843x.88.4.381
Lavelle TL, Metalsky GI, Coyne JC. Learned helplessness, test anxiety, and acknowledgment of contingencies. J Abnorm Psychol. 1979 Aug;88(4):381-7. doi: 10.1037//0021-843x.88.4.381. PMID: 479460.
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