Claims

Raw Vocabulary Size Test scores fell for the treatment group because most participants ran out of time on the posttest

Claim · All claims
Evidence · 1 study · causal r1 · q2
Currency · newest study 2017 · not yet checked against its sources · not reviewed by a person · overdue for a recheck since 2020: tool and model accuracy changes quickly

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? On raw Vocabulary Size Test scores, treatment-group posttest means were lower than pretest means, which the article attributes to participants not completing the test within the time limit. → Martinez 2017

Evidence

Martinez 2017

Liza E. Martinez. (2017). Adult Hispanic ESL Students and Graded Readers. The CATESOL Journal, 29(2). https://eric.ed.gov/?id=EJ1164286

q2 · i? · causal · r1

Descriptive analysis of treatment-group Vocabulary Size Test pre- and posttest raw scores (Table 1). The article notes that all treatment participants except one ran out of time and two arrived late, so they lacked the full 40 minutes; the printed means were 7,308 (pretest) and 6,120 (posttest).

"For the posttest, the mean was 19% lower than the pretest while the median was 24% lower."

Discussion

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