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7 Cards in this Set
- Front
- Back
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Test- Retest Reliability |
extent to which answers to the same instrument correlate when measure the same population over two different time periods
1. administer the SAME test/measure at two different times to the SAME groups of participants |
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Internal Reliability |
used to assess the reliability of the survey instruments
involves calculating correlation coefficients of each item/question of the survey (good > 0.80) |
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Cronbach's Alpha |
measures internal reliability Coefficient alpha should exceed 0.70
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Correlation |
shows how strong the relationship of 2 variables are of a single participant's responses to both the tests/measurements
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Correlation Coefficient ranges between 0 to. 0 = NO reliability/similarity/correlation 1 = perfect correlation |
Below 0.50 = poor reliability/correlation Between 0.50 - 0.75 = moderate reliability Over 0.75 = correlation
* interpretations of the coefficient depends on measurement |
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Increase reliability by _____ |
1. Decreasing Error 2. Increasing Sample Size 3. eliminate UNCLEAR questions 4. Standardize testing conditions 5. Moderate the degree of difficulty of the test 6. Minimize the effects of external events 7. Standardize instructions 8. Maintain consistent scoring procedures 9. Decreasing Bias |
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risk ratio |
if you have exposure - are you likely to die? |
