Reading and listening yield similar proportions of incidental vocabulary learning, with reading ahead only on some immediate posttests¶

Claim · All claims
Evidence · 2 studies · 1 quant-synthesis r3, 1 review r2 · q3 · i3 large · n=24 studies (29 effect sizes, N=2,771)
Currency · newest study 2023 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q3 i? In Vidal's study, reading subjects made greater vocabulary gains and retention than listening subjects, though higher-proficiency students showed slightly higher retention from listening. → Restrepo Ramos 2015

q3 i? Across 24 controlled second-language studies, reading had the largest incidental-learning effect on first posttests (g = 1.45 against 0.97 for listening), but proportions of words learned were similar (17% and 15% immediately, 15% and 13% delayed), and mode no longer moderated the effect on follow-up posttests. → Webb et al. 2023

Evidence¶

Restrepo Ramos 2015¶

Restrepo Ramos, F. D. (2015). Incidental vocabulary learning in second language acquisition: A literature review. PROFILE Issues in Teachers' Professional Development, 17(1), 157-166. http://dx.doi.org/10.15446/profile.v17n1.43957

q3 · i? · review · r2

Vidal's (2011) comparison assigned 248 first-year ESL undergraduates in Madrid to a listening condition (112 students), a reading condition (80 students), or a control group (38 subjects) (the article's group sizes sum to 230, not 248), testing 36 target words over four weeks; the review reports reading subjects made greater gains.

"Results showed that the reading subjects made greater vocabulary gains and retention than the listening subjects, which suggests that reading is a more effective source of vocabulary acquisition"

Webb et al. 2023¶

Webb, S., Uchihara, T., & Yanagisawa, A. (2023). How effective is second language incidental vocabulary learning? A meta-analysis. Language Teaching, 56(2), 161–180. doi:10.1017/s0261444822000507

q3 · meta-analysis · i3 · large effect, g = 1.14 on first posttests · n=24 studies (29 effect sizes, N=2,771) · quant-synthesis · r3

This meta-analysis (open-access full text read) pooled 24 studies of second-language vocabulary learned incidentally from meaning-focused input, 29 effect sizes and 2,771 participants (1,517 in experimental and 1,254 in control groups); studies without a control group were excluded. Against controls, the mean effect was large on first posttests (g = 1.14, 95% CI [0.86, 1.41], k = 28) and on follow-up posttests (g = 0.93, 95% CI [0.44, 1.42], k = 9), and fail-safe N and trim-and-fill showed little concern about publication bias. On first posttests, mode of input was a significant moderator (p = .023): reading g = 1.45 (k = 16), listening g = 0.97 (k = 5), reading while listening g = 0.78, viewing g = 0.60. On follow-up posttests the between-mode variation was not significant, and the authors caution that few delayed-test studies of listening, reading while listening and viewing exist. Proportions of words learned were similar for reading (17%, 15%) and listening (15%, 13%) on immediate and delayed posttests. Vidal (2011), the study behind this page's other entry, was excluded as an outlier more than three SDs above the mean effect sizes.

"Mean proportions of target words learned ranged from 9–18% on immediate posttests, and 6–17% on delayed posttests."

Studies bearing on this claim¶

Does a learner who listens to a text, or reads while listening, lose anything against reading it? This table gathers the studies behind this claim and the 3 narrower claims that bear on it: 5 distinct studies (3 quant-synthesis, 2 review), q2–q3, 3 of 5 with an effect size coded. One row per study, codes as each entry records them; no effect is averaged and no verdict is drawn. Built by scripts/synthesize_claim.py from eval/synthesis/; a row that looks wrong is fixed on the claim it comes from.

Discussion¶

The meta-analytic picture is narrower than one study's. Webb et al. (2023) support reading's advantage over listening as an effect size on immediate posttests, but not as a clear advantage in words learned or retained: proportions were similar across the two modes, and mode did not moderate follow-up effects. The study this claim was first drawn from, Vidal (2011), was excluded from that meta-analysis as an outlier. The page's earlier title, "greater gains and retention", therefore overstated what the pooled evidence shows for retention, and the title now follows the meta-analysis; Vidal's single study, reported through Restrepo Ramos (2015), is the dissenting entry.

Learner Variables¶

• Oral Language — outcome: instruction changes it

Related Claims¶

• Incidental vocabulary gains show retention problems, with losses over time moderated by feedback timing and topic interest — related
• Higher L2 reading proficiency, motivation, and involvement load are associated with larger incidental vocabulary gains — related
• Intentional vocabulary learning yields higher, faster gains and better retention than incidental learning through reading — related
• Incidental vocabulary exposure produces reliable learning, but learners pick up only a small share of the unknown words they meet — related
• L2 proficiency positively predicts L2 incidental vocabulary acquisition through reading — related
• ESL students using a spaced L2 vocabulary acquisition strategy with monthly incidental listening outperformed comparison students on the End-of-Experiment test — related
• Incidental vocabulary acquisition through comprehensible input is more powerful than intentional vocabulary learning — related
• Meaning-focused exposure to spoken L2 input yields large vocabulary gains (g = 1.05) in incidental word learning — related
• L2 learners pick up vocabulary incidentally from meaning-focused input, with reading the most-studied mode and listening yielding similar proportions of words learned — possibly the same claim (merge candidate)