Contributions of E-Portfolios Assessment to Developing EFL Learners’ Vocabulary, Motivation, and Attitudes

Table 2

Results of independent-samples t-test comparing the pretest vocabulary and posttest vocabulary scores.

		Levene’s test for equality of variances		t-test for equality of means
		F	Sig.	t	df	Sig. (2-tailed)	Mean difference	Std. error difference	95% confidence interval of the difference
									Lower	Upper
Pretest	Equal variances assumed	0.00	0.94	0.33	98	0.73	0.08	0.23	−0.39	0.55
	Equal variances not assumed			0.33	97.76	0.73	0.08000	0.23	−0.39	0.55
Posttest	Equal variances assumed	2.59	0.11	17.03	98	0.00	5.02000	0.29	4.43	5.60
	Equal variances not assumed			17.03	96.02	0.00	5.02	0.29	4.43	5.60