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Write 3 page essay on the topic 1.Discuss the comparative importance of reliability and validity in educational testing.Good results indicate maturity and growth in education. There are various reliab
Write 3 page essay on the topic 1.Discuss the comparative importance of reliability and validity in educational testing.
Good results indicate maturity and growth in education. There are various reliability tests. Test-retest reliability involves giving students same assessment twice over a period of time. Results from the two periods can then be analysed to ascertain the students’ consistency. Parallel-Forms reliability is used to measure consistency using two tests obtained from the same topical range. For example, two tests can be formed from the World Wars. (Shuttleworth, n.d.)
Inter-Rater reliability on the other hand, measures the consistency of observers when asked to write down their opinions regarding a subject or phenomena. It is more useful in artwork than in mathematics. Internal Consistency reliability measures the degree in which different items within a test yield the same results. There are two types of this assessment tool. The first type is the Average inter-item correlation. It involves getting correlation coefficient among different pairs of items within a test and then coming up with an average. The second type is the Split-half reliability. The items within a test are split into two halves and then administered to students. Coefficients obtained between the two are then evaluated to determine correlation. (Phelan & Wren, 2005)
The results of an assessment are also crucial for teachers and the learning process. Through the tests, informed decisions can be made about the methods used in teaching. If the teaching methods are reliable, then institutions can maintain them. However, if the results give undesirable results, then it will be plausible for the management to abandon them. They are also used in the assessment of the teachers. Reliability will indicate that the teachers are doing a good job and deserve the rewards like promotions and pay rises. Bad results are an indication of poor teaching methods and the management should look for the causes within the school environs. It may be poor teaching practices or bad student-teacher
