On a delayed delayed-post-test covering all 30 items, the PBL group (mean 23.80) outperformed the control group (mean 17.15)¶

Claim · All claims
Evidence · 1 study · causal r2 · q3
Currency · newest study 2015 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q3 i? In week 12, the experimental group with a mean score of 23.80 outperformed the control group that scored an overall mean of 17.15, on 99% confidence level. → Shafaei 2015

Evidence¶

Shafaei 2015¶

Shafaei, A., & Abdul Rahim, H. (2015). Does project-based learning enhance Iranian EFL learners' vocabulary recall and retention? Iranian Journal of Language Teaching Research, 3(2), 83-99. https://www.urmia.ac.ir/ijltr

q3 · i? · causal · r2

The delayed delayed-post-test in week 12 (11 weeks after the first post-test) was identical to the pre-test and combined questions on all 30 stimulus items in one session; the article reports Sig. < 0.01 with no effect size printed.

"Results show that the experimental group with a mean score of 23.80 outperformed the control group that scored an overall mean of 17.15, on 99% confidence level (Sig. < 0.01)."

Discussion¶

Learner Variables¶

• Long-Term Memory — outcome: instruction changes it

Related Claims¶

• PBL-taught Iranian EFL learners achieved significantly higher vocabulary recall (total post-test) than conventionally taught learners — possibly the same claim (merge candidate)
• PBL-taught learners showed significantly higher vocabulary retention on delayed post-tests in all modules except module 3 — related
• Spanish B1 learners taught equivocal words through joke-telling retained more vocabulary on a two-week delayed post-test than learners taught the same items conventionally — related