Validity and Reliability Matrix Essay

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Validity and Reliability Matrix Angela Clark Psychology 525 Measurement and Statistics Alexis Hernandez May 21, 2012 Validity and Reliability Matrix Validity and Reliability Matrix For each of the tests of reliability and validity listed on the matrix, prepare a 50-100-word description of test’s application and under what conditions these types of reliability would be used as well as when it would be inappropriate. Then prepare a 50-100-word description of each test’s strengths and a 50-100-word description of each test’s weaknesses. TEST of Reliability | Application and APPROPRIATENESS | Strengths | Weaknesses | Internal Consistency | Is typically a measure based on correlations between different items on the same test or the same subscale on a larger test. The Spearman-Bowman formula allows a user to estimate internal consistency reliability from the correlation of the two halves of the test. | The Spearman-Bowman formula is a specific application of a general formula to approximate the reliability of a test that has been shortened or lengthened. Because reliability is affected by the length of the test, a formula is necessary for estimating the test reliability that has been lengthened or shortened. Determining the reliability of half of the test a test developer can use the formula to approximate the reliability of the test of a whole. | Estimates of reliability in internal consistency, like the estimates of reliability use in the Spearman-Bowman formula are inappropriate for measuring reliability of speed test and heterogeneous test. Test is lower for half-test than they are for whole test applications when the Spearman-Bowman formula which means shorter test does not work with this instrument. | Split-half | The split-half method involves dividing the number of individual questions or items of a