African Journal of Physics Vol. 1 (2), 4 pages, October, 2013. © International Scholars Journals
Full Length Research Paper
Evaluating reliability, validity and complex indices for teacher-built physics exam questions in first year high school
Rif Aziz
University of Tehran, Qom College, Iran. E-mail: [email protected].
Accepted 17 August, 2013
Abstract
The purpose of the research is to determine high school teachers’ skill rate in designing exam questions in physics subject. The statistical population was all of physics exam shits for two semesters in one school year from which a sample of 364 exam shits was drawn using multistage cluster sampling. Two experts assessed the shits and by using appropriate indices and z-test and chi-squared test, the analysis of the data was done. We found that the designed exams have suitable coefficients of validity and reliability. The level of difficulty of exams was high. No significant relationship was found between male and female teachers in terms of the coefficient of validity and reliability but a significant difference between the difficulty level in male and female teachers was found(P<0.001). It means that female teachers had designed more difficult questions. We did not find any significant relationship between the teachers’ gender and the coefficient of discrimination of the exams.
Key words: Teacher, built exam, content validity, face validity, reliability, coefficient of discrimination, coefficient of difficulty.