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Should a Teaching Article Have a Comment Section? Evidence on Forum Participation, Reputation Systems, Study Groups, and Q&A Communities

MOOC learners who posted in the forum passed at much higher rates than those who did not (57% vs 8% in one course), but the authors themselves call this a correlation under self-selection. Randomly adding a reputation system made replies more numerous and faster, with no difference detected in grades; an instructor replying actively versus not at all showed no difference in completion or engagement. No study has tested what a blog comment section does for readers' learning.

What Reading Alone Misses: Evidence on Peer Interaction, Collaboration Scripts, Collaborative Inhibition, Peer Instruction, and Vicarious Learning

Peer interaction beats other learning conditions by an average g = 0.40, more when peers are told to reach consensus, but the participants were 4 to 18 and most studies had a single interaction; in Peer Instruction, 91% of students who picked the same wrong answer as their neighbor stayed wrong. Groups recalling together produce less than the pooled recall of the same number of people working alone; no study has compared adult self-learners reading alone with reading together.

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The Next Frontier in Online Learning: Why Completion Rate Is the Real Problem

MOOC completion rates hover at just 5–15%, and the problem isn't course quality — it's the execution gap. DaoDao positions itself as a 'Learning OS,' using public commitments, community interaction, and AI recommendations to make learning visible and sustainable.