Achievement level significantly differentiated posttest performance among students taught with PowerPoint, with high achievers outperforming medium and low achievers¶
Claim · All claims
Evidence · 1 study · causalr1·q2
Currency · newest study 2015 · 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? The main effect of achievement level (high, medium, low) on posttest scores in the PPT group was statistically significant. → Gambari 2015
Evidence¶
Gambari 2015¶
Gambari, A. I., Yusuf, H. T., & Balogun, S. A. (2015). Effectiveness of PowerPoint Presentation on Students' Cognitive Achievement in Technical Drawing. Malaysian Online Journal of Educational Technology, 3(4). https://eric.ed.gov/?id=EJ1085923
q2 · i? · causal · r1
ANCOVA on the 45-student PPT group using pretest scores of the three achievement levels as covariates. The article reports "F (2, 41) = 9.456, p < .05" for the ability main effect; hypothesis three was rejected. No effect size is printed.
"The result shows that F-value of 9.456 for the main effect was significant at .05 alpha level [ F (2, 41) = 9.456, p < .05]. This means that there is statistically significant difference in the posttest mean scores of the high, medium and low achievement levels students."
Discussion¶
Related Claims¶
- Sidak post-hoc comparisons show high achievers significantly outperformed medium and low achievers, and medium achievers outperformed low achievers, under PowerPoint instruction — possibly the same claim (merge candidate)
- All achievement levels benefited from PowerPoint instruction, with mean gains for high, medium and low achievers alike — related
- No significant difference in achievement between male and female students taught Technical Drawing with PowerPoint presentation — related
- Junior secondary students taught Technical Drawing with PowerPoint presentation achieved significantly higher posttest scores than students taught with chalkboard instruction — related
- Performance differed significantly across low, medium and high scoring students taught with behavioural objectives, with low scorers benefiting most — related
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