Claims

POESPBEE produced significantly higher environmental behaviors than teacher-centered environmental education, with large effect sizes at post-test and follow-up

Claim · All claims
Evidence · 1 study · causal r2 · q3 · i3 large
Currency · newest study 2020 · 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.

q3 i3 Eighth-grade students receiving POESPBEE scored significantly higher on the BSTE than the control group at post-test and follow-up, with large effect sizes (η2=0.35 and η2=0.32). → Calis 2020

Evidence

Calis 2020

Calis, D. & Yildirim, H.I. (2020). The Effect of Prediction, Observation, Explanation Supported Project-Based Environmental Education on the Levels of Attitude and Behavior Toward the Environment. Educational Policy Analysis and Strategic Research, 15(1), 22-43. https://doi.org/10.29329/epasr.2020.236.2

q3 · i3 · causal · r2

Independent samples t-test on Behavior Scale toward Environment scores of the experimental (n=34) and control (n=28) groups after the ten-week application. The article reports η2=0.35 at post-test and η2=0.32 at follow-up, both indicating a large effect size.

"there was a significant difference between the post-test scores (t (60)=-5.62; p<.05) and follow-up test scores (t (60)=-5.25; p<.05) in favor of the experimental group."

Discussion

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