“…Unlike offline silence where one can observe visible reaction [53]- [55], silence in virtual settings involves factors such as delayed communication [56], self-perceived behavior unknown to teachers [57], the need to work at one's own pace and within individual mental spaces [54], [58], [59], and the cognitive load of learning content [60]- [62]. Such difference between face-to-face and virtual contexts shows that silence is not context-free [63] but is often governed by factors such as self-discipline [64], learner cautiousness [65], stress [66], anxiety [67], [68], self-inhibition [69]- [72], cultural influences [53], [73], and personality [74], [75]. Being confronted by such factors, teachers need to manage student learning by organizing choices [76], providing intensive guidance [77], enhancing special networks [78], [79], optimizing mindful space [80]- [82] as well as encouraging peer harmony [83], [84] and self-truthfulness [85].…”