VBC session length of over 20 minutes is likely optimal, with shorter sessions more often failing to show significant benefit¶

Claim · All claims
Evidence · 1 study · quant-synthesis r3 · q2
Currency · newest study 2025 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q2 i? Only one of six studies with VBC sessions of 20 minutes or longer failed to show significant benefit, whereas three of four studies using shorter sessions failed to show a significant difference; the authors conclude the optimum session length is likely over 20 minutes pending further study. → Anderson Steven Mark 2025

Evidence¶

Anderson Steven Mark 2025¶

Anderson Steven Mark, Gillanders Sarahlouise, Hickey Anne, Offiah Gozie, Davis Niall. (2025). Video Killed the Radio Star—A Meta‐Analysis on Video‐Based Coaching to Improve Surgical Skill. World Journal of Surgery. https://doi.org/10.1002/wjs.12494

q2 · i? · quant-synthesis · r3

Narrative synthesis in the Discussion of session lengths across the included studies, which ranged from 10 to 45 minutes. The authors state it is "likely that the optimum session length is over 20 min" but that further studies are required to confirm this.

"Only one of the six studies that included VBC sessions of 20 min or longer failed to show a statistically significant benefit of VBC to the control, whereas three of the four studies that used shorter than 20 min sessions failed to show a significant difference. Therefore, it is likely that the optimum session length is over 20 min, but further studies are required to confirm this."

Discussion¶

Related Claims¶

• Video-based coaching produces significantly higher final surgical technical performance scores than control feedback methods — related
• The overwhelming majority of VBC participants across the studies found VBC a useful training tool — related
• Exercise session time of 30 minutes or less yields a larger working memory effect than longer sessions in chronic exercise interventions — reports the opposite
• No dose-response effect: video benefits do not systematically increase with intervention length — a broader claim this one bears on
• Duration of an average PLL session (50–180 minutes) did not significantly moderate the effect on cognitive achievement; the descriptive 60-versus-120-minute advantage did not generalise across durations — related
• Students identified coaching benefits in three broad themes (improved cognitions, behaviors, subjective well-being) and limitations including 30-minute session length and desire for more accountability — related