Participants incidentally acquired an average of 3.19 of 20 target words after reading two passages¶

Claim · All claims
Evidence · 1 study · associational r2 · q2
Currency · newest study 2016 · not yet checked against its sources · not reviewed by a person

Subclaims¶

Reading the evidence codes

q is the design tier, i the impact, n the sample, and the kind with its r the rigour judged within that kind: what each code means.

This claim: no standardized effect is recorded in observations/ for it yet, so no benchmark reading is possible.

q2 i? Participants incidentally acquired an average of 3.19 out of 20 target words (SD = 2.20). → Zhao 2016

Evidence¶

Zhao 2016¶

Zhao, A., Guo, Y., Biales, C., & Olszewski, A. (2016). Exploring learner factors in second language (L2) incidental vocabulary acquisition through reading. Reading in a Foreign Language, 28(2). http://nflrc.hawaii.edu/rfl doi:10.64152/10125/66903

q2 · i? · associational · r2

Descriptive statistics from the unannounced 20-item vocabulary test administered after 25 minutes of reading two passages; scores were pre-knowledge-adjusted. Mean acquisition was "3.19 out of 20 target words (SD = 2.20)".

"The data showed that participants incidentally acquired an average of 3.19 out of 20 target words (SD = 2.20) after reading the two passages."

Discussion¶

Learner Variables¶

Vocabulary — outcome: instruction changes it

Incidental vocabulary exposure produces reliable learning, but learners pick up only a small share of the unknown words they meet — a broader claim this one bears on
Vocabulary Knowledge Grows Incrementally With Repeated Encounters In Varied Contexts — a broader claim this one bears on
L2 proficiency positively predicts L2 incidental vocabulary acquisition through reading — related
Reading with marginal glosses is the most beneficial task condition for incidental vocabulary acquisition gains — 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
Mastery of incidental vocabulary learning strategies positively predicts L2 incidental vocabulary acquisition through reading — related
Reading a single authentic novel yields incidental vocabulary gains, with more gains for words occurring more than five times — related
Meaning-focused exposure to spoken L2 input yields large vocabulary gains (g = 1.05) in incidental word learning — related
Eighth-grade students acquire measurable partial knowledge of unfamiliar word meanings incidentally while reading natural text, with a small but statistically reliable context-learning effect — related

Page metadata

Field	Value
`type`	`claim`
`id`	`incidental-acquisition-rate-3-of-20-words`
`title`	`Participants incidentally acquired an average of 3.19 of 20 target words after reading two passages`
`description`	`Participants incidentally acquired an average of 3.19 of 20 target words after reading two passages`
`status`	`review`
`evidence_strength`	`moderate`
`newest_evidence`	`2016`
`generated`	by `process:wiki-ingest` on `2026-09-27`
`trust`	unverified — no one has confirmed this page's content
`sources`	1 — `zhao-2016`

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