After performing the item analysis and revising the items which need revision, the next step is to validate the instrument.…
Validity is the research measures what it intends to investigate. The three types of validity are construct validity, content validity, and internal validity. In qualitative research, it is the extent to which other researchers would arrive at similar results if they studied the same case using exactly the same procedures as the first researcher. In classical test theory, it refers to the amount of measurement error in the scores yielded by a test.
Abubakar Asaad in 2004 identified the factors that affect validity. These are the inappropriateness of the test item, directions of the test items, reading vocabulary and sentence structure
Validity is the degree to which a test measures what is supposed to be measured. The quality of a test depends on its validity. It is the most central and essential quality in the development, interpretation, and use of educational measures. The most important quality of good measuring assessment refers to the degree to which a test measures what it intends to measure.
The following are the types of validity in assessment. These are content validity, construct validity, concurrent validity, predictive validity, and face validity.