Calculate test retest reliability

    • [PDF File]Reliability Analysis - Discovering Statistics

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      Reliability Analysis Measures of Reliability Reliability: the fact that a scale should consistently reflect the construct it is measuring. One way to think of reliability is that other things being equal, a person should get the same score on a questionnaire if they complete it at two different points in time (test-retest reliability.

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    • [PDF File]HANDOUT ON RELIABILITY

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      test/scale forms, (i.e. mxy computed using the Pearson product moment formula), is n estimate of the reliability of either one of the alternate forms. This correlation coefficient is known as coefficient of equivalence. a. Test-Retest with Alternate Forms Method This method is a combination of the test-retest and alternate-forms methods. In

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    • [PDF File]Alternate Forms Test-Retest Reliability and Test …

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      the estimated reliability is the alternate form test-retest reliability. The estimated reliability coefficients of test-retest and alternate form test-retest reliability are usually lower than the internal consistency reliability estimate. The reason why is that reliability of the two types of test-retest is affected by more measurement errors ...

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    • [PDF File]An Instructor’s Guide to Understanding Test Reliability ...

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      reliability estimate of the current test; and m equals the new test length divided by the old test length. For example, if the test is increased from 5 to 10 items, m is 10 / 5 = 2. Consider the reliability estimate for the five-item test used previously (α=ˆ .54). If the test is doubled to include 10 items, the new reliability estimate would be

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    • [PDF File]How do you Determine if a Test has Validity, …

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      If a test yields inconsistent scores, it may be unethical to take any substantive actions on the basis of the test. There are several methods for computing test reliability including test-retest reliability, parallel forms reliability, decision consistency, internal …

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    • [PDF File]Calculating Reliability of Quantitative Measures

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      problems with test administration (e.g. too much noise distracted the participant). • To calculate: Administer the same test to the same participants on two different occasions. Correlate the test scores of the two administrations of the same test. – Parallel Forms Reliability: Determines how compara ble are two different

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    • [DOC File]VALIDITY AND RELIABILITY - Purdue University

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      (Gay) Reliability is the degree to which a test consistently measures whatever it measures. Errors of measurement that affect reliability are random errors and errors of measurement that affect validity are systematic or constant errors. Test-retest, equivalent forms and split-half reliability are all determined through correlation.

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    • [DOCX File]A Brief Introduction to Reliability and Validity

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      Reliability. Simply put, a reliable measuring instrument is one which gives you the same measurements when you repeatedly measure the same unchanged objects or events. We shall briefly discuss here methods of estimating an instrument’s reliability.

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    • [DOC File]Reliability and validity

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      Test-Retest Method: Test-retest reliability is a measure of stability (Gronlund & Linn, 1990). For this method the test is administered twice to the same set of students. The correlation between students’ scores on the first test and scores on the second test is an estimate of reliability.

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    • [DOC File]Chapter 1 – Categorizing Psychological Tests

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      Reliability—Test developers and researchers should provide evidence of internal consistency or homogeneity Evidence of test–retest reliability is also appropriate. Convergent validity—A strong correlation between the test and other tests measuring the same or similar constructs is necessary

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    • Multifactor Leadership Questionnaire

      Finally, attempts were made to estimate the test-retest reliabilities of the MLQ-5X leadership scales. Test-retest reliability rtt is an indicator of a constructs’ temporal stability.

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    • [DOC File]PSY 395 Lab #2 Norms and Reliability

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      This is the first requirement for good measurement. For a test to be an adequate measure of an attribute, it must be reliable – it must be consistent. Different types of reliability estimates: - test-retest – consistency of test scores when the same test is taken at two different times – …

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    • [DOC File]Reliability

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      Reliability – New Material. Types of reliability estimates continued: Test-retest – consistency of test scores when the same test is taken at two different times – consistency of scores over time. We find this by correlating the score of the test taken at time 1 with the score of the test taken at time 2. Why might scores change over time?

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    • ResearchGate

      Test-retest results showed that the TAIKT and RAST are reliable. ... SEM=SD×√1-ICC.22 The usefulness of the test was assessed by calculate the smallest ... Test-retest results and reliability ...

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    • [DOC File]Reliability Analysis - Stanford University

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      Test-retest reliability. The calculation of test-retest reliability is straightforward. The same test is administrated on two occasions to the same individuals under the same conditions. This yields two scores for each person and the correlation between these two sets of scores is the test-retest reliability …

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