Cultivating Iranian IELTS Candidates’ Writing Skills through Online Peer Feedback: A Mixed-Methods Inquiry

Table 8

Inferential statistic for comparing the post- and delayed posttest scores of online peer feedback and non-peer-feedback.

Tests of between-subject effects
Dependent variable: delayed posttest
Source	Type III sum of squares	df	Mean square	F	Sig.	Partial eta squared
Corrected model	387.234^a	2	197.617	58.412	0.000	0.624
Intercept	134.567	1	134.567	61.045	0.000	0.714
Pretest	36.587	1	36.587	11.901	0.002	0.223
Instruction	234.210	1	234.210	76.103	0.000	0.646
Error	81.666	24	3.402
Total	2667.000	27
Corrected total	406.500	26

^aR squared = 0.770 (adjusted R squared = 0.742).