Development of teachers’ teaching assessment form according to visible learning theory

บทคัดย่อ

The present research aimed at constructing and examining the teacher’s teaching assessment form according to Visible Learning theory. Its validity, discrimination, and reliability were analyzed. The samples of the study were 5 experts, 100 teachers for a tryout, and 300 teachers for field study experiment. The instrument was a 42-item teacher’s teaching assessment form based on Visible Learning principle. The reliability value of the form obtained from the tryout was 0.90. The collected data were analyzed using Factor Analysis, itemtotal-correlation, Index of item objective congruence (IOC), and Cronbach’s Alpha Coefficient methods. The results revealed that the IOC of the constructed teacher’s teaching assessment form was between 0.80 and 1.00. The Initial Eigenvalues Total was between 0.93 and 14.06, the variance components were 33.49 percent, 21.72 percent, 5.28 percent, 3.09 percent, 2.68 percent, and 2.21 percent, respectively, and the Total Cumulative % was 68.46 percent. The number of the components responded to the theory with the Item Total Correlation Coefficient of between 0.33 and 0.68, which was higher than the standard criteria. Finally, the Cronbach’s Alpha Coefficient was 0.94 and was considered at the excellent level.