In Experiment 2, the interleaving benefit on actual test outcomes was not statistically significant, unlike in Experiment 1¶

Claim · All claims
Evidence · 1 study · causal r2 · q3 · i1 small
Currency · newest study 2023 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q3 i1 Actual learning outcomes were numerically higher for interleaved than blocked studying (d = -0.23) but the difference was not statistically significant. → Janssen 2023

Evidence¶

Janssen 2023¶

Janssen, E. M., van Gog, T., van de Groep, L., de Lange, A. J., Knopper, R. L., Onan, E., Wiradhany, W., & de Bruin, A. B. H. (2023). The Role of Mental Effort in Students' Perceptions of the Effectiveness of Interleaved and Blocked Study Strategies and Their Willingness to Use Them. Educational Psychology Review. https://doi.org/10.1007/s10648-023-09797-3

q3 · i1 · causal · r2

Experiment 2 independent t-test (Bonferroni-corrected p < 0.025) on the 10-item test found the interleaved condition scored higher numerically but "not statistically significant", t(297) = -1.99, p = 0.048, Cohen's d = -0.23.

"the actual learning outcomes were higher for the interleaved study condition (M = 6.92, SD = 2.06) than for the blocked study condition (M = 5.83, SD = 1.60). However, in contrast to our expectations, this difference was not statistically significant, t(297) = -1.99, p = 0.048, Cohen's d = -0.23."

Discussion¶

Related Claims¶

• Interleaved practice produces higher mathematics test scores than blocked practice in a classroom experiment — related
• At a 1-day test delay, interleaved practice yields a moderate benefit over blocked practice (d = 0.42) — related
• The interleaving benefit appears in three of four problem-type-by-delay comparisons; the slope-problem effect at 1 day was not statistically significant — related
• The test benefit of interleaved practice does not diminish over time and perhaps grows larger (d = 0.79 at 30 days) — related
• The interleaving benefit is not caused by spacing, and the benefit extends to delayed tests — a broader claim this one bears on