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. 2021 Jul 28;12:835–842. doi: 10.2147/AMEP.S294980

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© 2021 Qian et al.

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Knowledge acquisition and retention.

Notes: Group mean total scores on knowledge assessment test at baseline (pretest), immediately after the online COVID-19 lesson (posttest) and 2 months later (retention test). The change in scores between baseline and immediately after the lesson represents knowledge acquisition and is significantly better in the observation classroom. The change in scores from immediately after the intervention until end of 2-month follow-up represents knowledge retention and is significantly better in the observation classroom.