Extensive reading of graded readers produced substantial vocabulary learning gains for EFL learners across proficiency levels¶

Claim · All claims
Evidence · 1 study · associational r1 · q3
Currency · newest study 2015 · checked against its sources 2026-10-20 (automated, 1 of 1 entry) · not reviewed by a person

Subclaims¶

q3 i? All three proficiency groups made vocabulary learning gains through reading graded readers, with relative gains from pretest to immediate posttest of 28.12% or more even for the low-level group. → 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

In the 60-participant extensive reading study over 37 weeks, even the low-level group achieved a relative gain of 28.12% from pretest to immediate posttest, showing vocabulary learning occurred at all three prior-knowledge levels.

"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 — outcome: instruction changes it
• Vocabulary — outcome: instruction changes it

Related Claims¶

• Incidental vocabulary exposure produces reliable learning, but learners pick up only a small share of the unknown words they meet — the general claim this finding bears on, with the studies behind it

• Vocabulary Knowledge Grows Incrementally With Repeated Encounters In Varied Contexts — the general claim this finding bears on, with the studies behind it

• Prior vocabulary knowledge moderates vocabulary learning gains in an extensive reading program, with high-level learners gaining more than intermediate and low-level learners — 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
• Vocabulary learning gains in Term 2 of the extensive reading program were consistent with those from Term 1 — related
• Pretest-posttest correlation coefficients for state assessment data vary by student achievement level (low-performing, average-performing, proficient). — related
• Reading proficiency level moderates incidental vocabulary gains: higher-proficiency readers gained more, consistent with i+1 — related