Only the experimental group showed a significant pretest-to-posttest change in difference scores¶

Claim · All claims
Evidence · 1 study · causal r1 · q2
Currency · newest study 2018 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q2 i? Comparing difference scores, only the experimental group changed significantly from pretest to posttest (DS 4.59 vs -.045). → Shabani 2018

Evidence¶

Shabani 2018¶

Karim Shabani. (2018). Group Dynamic Assessment of L2 Learners' Writing Abilities. Iranian Journal of Language Teaching Research 6(1), 129-149. https://eric.ed.gov/?id=EJ1165517

q2 · i? · causal · r1

Independent samples t-test on pretest-to-posttest difference scores of both groups (N=22 each). The article reports the control group's difference score was -.045 and the experimental group's 4.59, with t = -7.361, p = 0.000; no effect size is printed.

"As can be seen in Tables 8 and 9, the difference scores of the control and experimental groups were -.045 and 4.59, respectively, which indicated that only the experimental group underwent a significant change from the pretest to the posttest (df = 42, t = -7.361, p = 0.000)."

Discussion¶

Related Claims¶

• Both DS-integrated and traditional writing instruction significantly improved narrative writing scores from pre-test to post-test — reports the opposite
• The CL class improved significantly from pretest to posttest while the traditional-taught class did not — related