Claims

95% of treatment students improved on the NCGE versus 32% of controls, and negative change was rarer in the treatment group

Claim · All claims
Evidence · 1 study · causal r2 · q3
Currency · newest study 2013 · 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 i? 124 of 131 treatment students (95%) improved by one or more points versus 27 of 84 controls (32%); negative change occurred in 3% of treatment versus 23% of control students. → Richardson 2013

Evidence

Richardson 2013

Richardson, Ronald; Brouillette, Liane. (2013). Historic and Ethnic Music Found to Increase Geographic Understanding: A Quasi-Experimental Study. Journal for Learning through the Arts, 9(1). http://escholarship.org/uc/item/71g4x3cr

q3 · i? · causal · r2

Contingency-table analysis (Table 4) of baseline-to-follow-up NCGE change categories for all 215 students. The article also reports "19 out of 84 students in the control group, or 23%, had a negative change" versus 4 of 131 (3%) in treatment. No effect size is printed for this categorical comparison.

"only 27 out of 84, or 32% of control group students improved by one or more points on the NCGE, as compared to 124 out of 131, or 95% of the treatment group students who improved by one or more point"

Discussion

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