Publication bias is present in the Turkish flipped learning literature, and correcting it lowers the pooled effect from 0.895 to 0.713¶

Claim · All claims
Evidence · 1 study · quant-synthesis r2 · q3
Currency · newest study 2021 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q3 i? The funnel plot and Begg and Mazumdar rank correlation (Tau = 0.534, p = 0.000) indicate publication bias; trim and fill added 7 studies and reduced the random effects estimate to 0.713. → Aydin 2021

Evidence¶

Aydin 2021¶

Aydin, M., Okmen, B., Sahin, S., & Kilic, A. (2021). The Meta-Analysis of the Studies About the Effects of Flipped Learning on Students' Achievement. Turkish Online Journal of Distance Education-TOJDE, 22(1), Article 3. https://eric.ed.gov/?id=EJ1283687

q3 · i? · quant-synthesis · r2

Publication-bias analysis of the 28 datasets: funnel plot asymmetry, Begg and Mazumdar Tau = 0.534 with p = 0.000 (2-tailed), and Duval and Tweedie's trim and fill correction adding 7 studies, yielding the final effect value of 0.713.

"As it is seen on Figure 3, it is seen that the symmetry has been formed by adding 7 studies to the left side as a result of correction made. By using this method, -being formed to correct the effect resulted from publication bias according to random effects model – new effect value is 0.713."

Discussion¶

Related Claims¶

• Flipped learning has a medium positive effect on students' academic achievement in Turkish experimental studies after publication-bias correction (Hedges's g = 0.713) — possibly the same claim (merge candidate)
• Across 28 datasets, the pooled effect of flipped learning on success is positive and statistically significant, with 20 of 28 individual datasets significant — related
• Smaller, underpowered studies report larger flipped classroom effect sizes, indicating small-study and publication bias — related
• The meta-analysis shows no publication bias (Begg-Mazumdar p = .196) and is resistant to it (fail-safe N = 463) — reports the opposite
• No evidence of publication bias was found in the flipped classroom literature, though dissertations showed a larger (non-significantly different) effect size than journal articles — reports the opposite