Asia-Pacific Forum on Science Learning and Teaching, Volume 18, Issue 2, Article 5 (Dec., 2017) Igor KORSUN The use of interdisciplinary approach for the formation of learners’ situational interest in Physics Previous Contents Next

Results

Data Analysis
The number of learners for each level of situational interest has been determined. The results of the experiment are presented in Table IV.

Table IV. Results of measurements in CG and EG

The level of situational interest	Pre-test (number of learners)		Post-test (number of learners)
	CG	EG	CG	EG
low	14	12	16	5
average	24	24	24	28
high	7	6	5	9

Statistical analysis
Pearson’s chi-squared test χ² for the analysis of received data has been used. Measurements were conducted in a three-level scale of gradation. As a rule, significance level of 5% is used in pedagogical researches. Critical chi-squared value  for this significance level in the three-level scale of gradation equals 5.99. Pre-test results show that no difference between control and experimental groups because chi-squared statistic χ² is less than value 5.99. Post-test results show that there is a difference between two groups because chi-squared statistic χ² is more than value 5.99. In this way, post-test results have confirmed the alternative hypothesis: the difference between critical chi-squared value and calculated chi-squared value is due with not accidental, but with essential reasons – the use of the interdisciplinary approach in physics teaching. Since we used significance level of 5%, then the reliability of difference is equal to 95%.