Prior vocabulary knowledge moderates vocabulary learning gains in an extensive reading program, with high-level learners gaining more than intermediate and low-level learners¶

Claim · All claims
Evidence · 1 study · associational r1 · q3
Currency · newest study 2015 · checked against its sources 2026-10-17 (automated, 1 of 1 entry) · not reviewed by a person

Subclaims¶

q3 i? Relative gains from pretest to immediate posttest were 63.18%, 44.64%, and 28.12% for the high-, intermediate-, and low-level groups respectively, indicating prior vocabulary knowledge may have a large impact on learning through extensive reading. → Stuart Webb and Anna C.-S. Chang 2015

Evidence¶

Stuart Webb and Anna C.-S. Chang 2015¶

Stuart Webb and Anna C.-S. Chang. (2015). HOW DOES PRIOR WORD KNOWLEDGE AFFECT VOCABULARY LEARNING PROGRESS IN AN EXTENSIVE READING PROGRAM? Studies in Second Language Acquisition, Volume 37, Issue 4, pp. 651-675. https://doi.org/10.1017/S0272263114000606

q3 · i? · associational · r1

Study of 60 EFL learners divided into high-, intermediate-, and low-level groups based on pretests of target vocabulary and Vocabulary Levels Test scores; the article reports "the relative gains from pretest to immediate posttest were 63.18%, 44.64%, and 28.12%" for the three groups respectively.

"The results showed that the relative gains from pretest to immediate posttest were 63.18%, 44.64%, and 28.12% for the high-, intermediate-, and low-level groups, respectively."

Discussion¶

Learner Variables¶

• Reading and Language — moderator: an instructional effect differs with it
• Vocabulary — moderator: an instructional effect differs with it

Related Claims¶

• Vocabulary Knowledge Grows Incrementally With Repeated Encounters In Varied Contexts — the general claim this finding bears on, with the studies behind it
• Extensive reading of graded readers produced substantial vocabulary learning gains for EFL learners across proficiency levels — related
• Vocabulary knowledge gained through extensive reading showed little decay on a three-month delayed posttest, with relative gains ranging from 21.05% (low-level) to 59.01% (high-level) — 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 — a broader claim this one bears on
• Vocabulary learning gains in Term 2 of the extensive reading program were consistent with those from Term 1 — related
• Available second language research indicates extensive reading programs are generally more effective than systematic vocabulary instruction using decontextualized exercises — related
• Critical thinking improvement differed by proficiency level: high-level students gained 18%, intermediate 12%, and low-level 8%, with asymmetric feedback adaptation — related
• Reading proficiency level moderates incidental vocabulary gains: higher-proficiency readers gained more, consistent with i+1 — related