Claims

The experimental group's Geography achievement scores rose significantly from pre-test to post-test after PowerPoint instruction

Claim · All claims
Evidence · 1 study · causal r1 · q2
Currency · newest study 2018 · 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? Within the PowerPoint group, the post-test mean (35.50) was significantly higher than the pre-test mean (32.67). → Onivehu and Ohawuiro 2018

Evidence

Onivehu and Ohawuiro 2018

Adams Ogirima Onivehu, Onyiyeche Emilia Ohawuiro. (2018). Effect of PowerPoint Presentation on Students' Cognitive Achievement in Geography. Romanian Review of Geographical Education, VII(1), 46-60. https://doi.org/10.23741/RRGE120184

q2 · i? · causal · r1

Within-group pre-post comparison of the 45-student PowerPoint group over a three-week treatment, measured with the Geography Achievement Test. The article reports means of 32.67 and 35.50 and a significant difference; the printed test statistic (t(88)=35.50) appears internally inconsistent with the reported means, and no effect size is given.

"the pre -test mean score of the experimental group was M=32.67 before instruction, and the post- test mean score was M= 35.50 after instruction. These results show that there was a significant difference between mean scores of the pre-tes t and post- test of the experimental group (t(88)=35.50, p<.005)."

Discussion

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