The eLearning literature suggest that most studies of eLearning acceptance usually apply the broader technology acceptance model (TAM) (Davis, 1989; Venkatesh et al., 2003) to eLearning. It might be a good idea to take a look at TAM and its application to eLearning. The following widely cited papers might be helpful (find papers attached):
Davis, F. D. (1989) ‘Perceived Usefulness, Perceived Ease of Use, and User Acceptance of Information Technology’, MIS Quarterly, 13(3), pp. 319–340. doi: 10.2307/249008.
Park, S. Y. (2009) ‘An Analysis of the Technology Acceptance Model in Understanding University Students’ Behavioral Intention to Use e-Learning’, Journal of Educational Technology & Society, 12(3), pp. 150–162.
Roca, J. C., Chiu, C.-M. and Martínez, F. J. (2006) ‘Understanding e-learning continuance intention: An extension of the Technology Acceptance Model’, International Journal of Human-Computer Studies, 64(8), pp. 683–696. doi: 10.1016/j.ijhcs.2006.01.003.
Selim, H. M. (2007) ‘Critical success factors for e-learning acceptance: Confirmatory factor models’, Computers & Education, 49(2), pp. 396–413. doi: 10.1016/j.compedu.2005.09.004.
Venkatesh, V., Morris, M. G., Davis, G. B. and Davis, F. D. (2003) ‘User Acceptance of Information Technology: Toward a Unified View’, MIS Quarterly, 27(3), pp. 425–478.