Unit 3 Assessment of Learning Lecture40 Essential Criteria

Unit -3: Assessment of Learning Lecture-40: Essential Criteria of an Effective Tool of Evaluation 2/22/2021

Reliability Norms Criteria Validity Of An Effective Tool of Evaluation Objectivity Usability 2/22/2021

� Validity tells us about the accuracy and truthfulness of a test. The accuracy of a test can be said if and when the test measures the purpose it was constructed. � Validity talks not only about consistency but also accuracy and truthfulness of the test results. 2/22/2021

“Validity is the extent to which a test measures what it purports to measure’. -Cronbach (1970) “An index of validity shows the degree to which a test measures what it purports to measure when compared with accepted criterion. ” -Freeman (1965) 2/22/2021

i. Validity is an index of external correlation. The test scores are correlated with external criterion scores such as the test scores will be correlated with an earlier developed valid test prepared for measuring the same aspect. ii. The criterion may be a set of operation purpose or predictor future course of performance. iii. It deals with the psychological construct of a variable which is indirectly measured with the help of behaviours. 2/22/2021

iv. No test in education and psychology is perfectly valid because measurement is indirect. v. Validity endorses the reliability of a test. If a test is valid, it must be reliable, but a reliable test may or may not be valid. vi. It refers to the truthfulness or purposiveness of test scores. vii. It indicates the degree to which the test is capable to achieve the aims for which it is developed. viii. Validity is best considered in terms of matter of degrees, such as high, moderate and low validity. 2/22/2021

Prepared By, Dr. Prerna Mandhyan Asst. Prof. Dept. of Education D. S. College, Katihar Email id: prerna. mandhyanpu@gmail. com 2/22/2021