Both experimental and control groups improved their proportional reasoning scores from pretest to posttest¶

Claim · All claims
Evidence · 1 study (2 entries) · causal r2 · q2
Currency · newest study 2017 · not yet checked against its sources · not reviewed by a person · overdue for a recheck since 2022: baselines and conditions change

Subclaims¶

q2 i? The experimental group's pretest-posttest PRT difference was statistically significant in favor of the posttest (Wilcoxon Z=-3.393, p=.001). → Şen 2017 q2 i? The control group's pretest-posttest PRT difference was also statistically significant in favor of the posttest (Wilcoxon Z=-2.473, p=.013). → Şen 2017 (2)

Evidence¶

Şen 2017¶

Şen, C., & Güler, G. (2017). Effect of Strategy Teaching For the Solution of Ratio Problems on Students' Proportional Reasoning Skills. Malaysian Online Journal of Educational Sciences, 5(2). https://eric.ed.gov/?id=EJ1142503

q2 · i? · causal · r2

Wilcoxon Signed-Rank test of the experimental group's (n=16) pretest-posttest PRT scores; the table prints Z=-3.393, p=.001, with 15 positive ranks and 1 negative rank. The text states the difference was "in favor of the posttest scores".

"In Table 4, it is seen that there was a statistically significant difference between the pretest and posttest scores of experimental group students, and this difference was in favor of the posttest scores (p=.002<.05)."

Şen 2017 (2)¶

Şen, C., & Güler, G. (2017). Effect of Strategy Teaching For the Solution of Ratio Problems on Students' Proportional Reasoning Skills. Malaysian Online Journal of Educational Sciences, 5(2). https://eric.ed.gov/?id=EJ1142503

q2 · i? · causal · r2

Wilcoxon Signed-Rank test of the control group's (n=16) pretest-posttest PRT scores; the table prints Z=-2.473, p=.013, with 13 positive ranks, 1 negative rank, and 2 equal. No effect size is printed.

"In Table 5, it is seen that there was a statistically significant difference between the pretest and posttest scores of control group students and this difference was in favor of the posttest scores (p<.05)."

Discussion¶

Learner Variables¶

• Proportional Reasoning — outcome: instruction changes it

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