Generation tasks show no significant overall treatment effect on L2 vocabulary Knowledge scores compared with baseline non-generative tasks¶

Claim · All claims
Evidence · 1 study · causal r1 · q2
Currency · newest study 2025 · checked against its sources 2026-10-17 (automated, 1 of 1 entry) · not reviewed by a person

Subclaims¶

q2 i? The overall effect of the generation treatment on Knowledge scores was not statistically significant (β = –0.19, z = –0.44, p = .661). → John Duplice 2025

Evidence¶

John Duplice 2025¶

John Duplice. (2025). Generation and L2 Vocabulary Learning: A Classroom Action Study on the Efficacy of the Generation Desirable Difficulty in Learning L2 Vocabulary. Vocabulary Learning and Instruction, 14(1). https://doi.org/10.29140/vli.v14n1.102482

q2 · i? · causal · r1

Classroom action study: generalized linear mixed model (binomial) of Knowledge scores for 23 Japanese university ELLs, generation vs baseline conditions across pre-test and two post-tests. The article reports the overall treatment effect "found not to be significant."

"The overall effects of treatment (β = –0.19, z = – 0.44, p = .661) were found not to be significant."

Discussion¶

Learner Variables¶

• Reading and Language — outcome: instruction changes it
• Vocabulary — outcome: instruction changes it

Related Claims¶

• Generation Effect Improves Retention — the general claim this finding bears on, with the studies behind it
• Treatment-by-test-type interactions in Knowledge scores significantly favor the generation condition's improvement from pre-test to post-tests — related
• Generation as the sole desirable difficulty produced no detrimental effect on L2 vocabulary recall, in contrast to prior short-term findings — a broader claim this one bears on
• Bonferroni-corrected pairwise comparisons show no significant generation-versus-baseline differences at any test point for Knowledge scores — possibly the same claim (merge candidate)