Before treatment, the experimental and control groups showed no significant difference in overall language proficiency¶

Claim · All claims
Evidence · 1 study · causal r1 · q2
Currency · newest study 2014 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q2 i? An independent samples t-test on TOEFL pretest scores found no significant difference between the two groups (Sig. .69, above .05). → Abdorreza Tahriri 2014

Evidence¶

Abdorreza Tahriri 2014¶

Abdorreza Tahriri, Masoud Khalili Sabet, Afrouz Aeineh. (2014). The Effect of Portfolio Assessment on Learning Idioms in Writing. International Journal of Education & Literacy Studies, 2(2). http://dx.doi.org/10.7575/aiac.ijels.v.2n.2p.53

q2 · i? · causal · r1

Homogeneity check on TOEFL pretest scores of the 15-member control and 15-member experimental groups. Table 1 prints means of 75.73 (control) and 77.00 (experimental); the t-test Sig. of .69 led the authors to conclude "there is no significant difference between the means of the two groups" before treatment.

"With this assumption, the Sig. value is .69 which is higher than .05. We can conclude that there is no significant difference between the means of the two groups."

Discussion¶

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