Average instruction time differed significantly between conditions, with demonstration by far the shortest, replicating the original study's durations¶

Claim · All claims
Evidence · 1 study · causal r3 · q3
Currency · newest study 2025 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q3 i? Instruction duration differed significantly across conditions, and the replication reproduced the original durations. → Smit 2025

Evidence¶

Smit 2025¶

Smit, N., de Kleijn, R., Wicherts, J. M., & van de Pol, J. (2025). What it takes to tutor—A preregistered direct replication of the scaffolding experimental study by D. Wood et al. (1978). Journal of Educational Psychology. Advance online publication. https://doi.org/10.1037/edu0000965

q3 · i? · causal · r3

Preregistered ANOVA on instruction phase duration in the randomized replication; the article reports F(3, 281) = 111.52, p < .001, and states in Table 9 comparisons that it "successfully replicated the average duration of instruction in the different instruction conditions."

"the average minutes of instruction differed significantly between conditions,F(3, 281) = 111.52, p , .001"

Discussion¶

Learner Variables¶

• Time and Continuity — outcome: instruction changes it

Related Claims¶

• Children's activity scores did not significantly differ between instructional conditions in the replication, failing to replicate the higher activity of contingently taught children in 1978 — related
• Posttest performance of the replication's contingent condition was far below the original study's contingent condition, a large unregistered difference not seen for the three control conditions — related
• Time on task does not explain the erroneous-examples delayed learning advantage — related