The experimental and control groups were homogeneous in English proficiency before the intervention¶

Claim · All claims
Evidence · 1 study · causal r2 · q2
Currency · newest study 2011 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q2 i? A One-Way ANOVA with the Levene test on CELT scores showed no significant mean difference between groups. → Behzad Nezakatgoo 2011

Evidence¶

Behzad Nezakatgoo 2011¶

Behzad Nezakatgoo. (2011). The Effects of Portfolio Assessment on Writing of EFL Students. English Language Teaching, 4(2). https://doi.org/10.5539/elt.v4n2p231

q2 · i? · causal · r2

Homogeneity check on CELT scores before the intervention; the Levene statistic was 3.022 with significance of 0.000, and the ANOVA mean difference between groups was reported not significant. No effect size is printed.

"The researcher conducted a One Way ANOV A including the Levene Test to approve of the homogeneity of both experimental and control groups in terms of their proficiency based on their scores on Comprehensive English Language Test (CELT)."

Discussion¶

Related Claims¶

• The four groups were homogeneous in general English proficiency before treatment (placement-test ANOVA sig .881) — related
• Before treatment, the experimental and control groups showed no significant difference in overall language proficiency — related
• Co-taught and single-taught groups were statistically equivalent in general English proficiency before treatment — related
• A one-way ANOVA found no significant difference in writing proficiency among the five pre-test groups — related
• The four instruction groups were equivalent in writing quantity before the intervention — related
• The three intact classes were equivalent in general proficiency before treatment, supporting comparability of groups — related