| 总结: | The practice of online learning can appreciably enhance administrative, communicative, and educational qualities, support learning using scarce resources and limited infrastructure, and encourage educational equity through flexible place and time usage. Although researchers have examined online learning usage within multiple situations, the roles of task-technology-fit (TTF) and compatibility as mediating variables have not been investigated through Delone and Mclean's model of IS success. Survey data gathered from 448 students across nine public universities within Yemen was collectively analysed through structural equation modelling (SEM) using SmartPLS 3.0. The findings comprised six primary outcomes, wherein overall quality (service, system, and information qualities) appreciably influences compatibility; compatibility appreciably influences user satisfaction as well as practical use; compatibility mediates associations among overall quality and either satisfaction and practical usage; actual use and the satisfaction of users appreciably influences TTF; the role of TTF presents positive influences performances; and TTF mediates associations among satisfaction and practical usage in one case and performance in another. © 2019
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