2. It is a source of error in measuring a targeted variable caused by unpredictable fluctuations and inconsistencies of other variables in the measurement process

3. It is a ruler made from steel that can be a very reliable instrument of measurement.

4. It is a specific of a more general formula to estimate the reliability of a test that is lengthened or shortened by any number of items

5. It is the degree of correlation among all items on a scale | calculated from a single administration of a single form of a test

6. It is a measure used to evaluate the internal consistency of a test that focuses on the degree of difference that exists between item scores

7. It is a test items or questions that can be answered with only one of two alternative responses, such as true–false or yes–no questions

8. It is the degree to which a test measures different factors

9. It is the sources of error variance that occur during test administration may influence the testtaker’s attention or motivation

10. It is a range or band of test scores that is likely to contain the true score