1. The statistical methods used to find the efficiency of CAI were:
1) Efficiency of CAI set up by Chiewpimai (1983)
2) Percentage
3) Mean
2. The Effectiveness Index of CAI by Goodman et al. (1980)
3. Statistics used for the achievement test were:
1) The difficulty (p) of the test
2) The discrimination Index (r) of the test
3) The reliability of the pre-test and post-test KR20 of Kuder Richardson
was 0.59
4) The difference of pre-test and post-test scores of the sample
was tested by t-test (Srisa-ad, 1992)