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PURPOSE: To provide information regarding the psychometric testing of measurement tools/instruments.


LEARNING OBJECTIVES/OUTCOMES: After completing this continuing education activity, you will be able to


1. identify tools that measure the reliability of an instrument.


2. identify tools that measure the validity of an instrument.


1. A measurement instrument is reliable when it


a. is consistent over time.


b. accurately measures constructs.


c. is theoretically sound.


2. An instrument's reliability refers to its internal consistency, equivalence and


a. validity.


b. stability.


c. factor analysis.


3. What is the statistical measure for test-retest reliability?


a. Spearman Brown correlation


b. Cronbach's alpha coefficient


c. Pearson's r correlation


4. A Pearson r correlation coefficient of 0.75 indicates


a. no relationship.


b. a negative relationship.


c. a strong relationship.


5. Internal consistency reliability is frequently measured using


a. a Spearman Brown correlation.


b. Cronbach's alpha coefficient.


c. Pearson's r correlation.


6. What is the range of the Cronbach's alpha coefficient?


a. 0 - 1


b. +1 to -1


c. 0.8 - 1


7. What is the minimum Cronbach's alpha coefficient that many professionals require?


a. 0.50


b. 0.70


c. 0.90


8. Cronbach's alpha coefficient measures how


a. much an instrument's items fit together.


b. items gather around a dimension.


c. theoretically sound an instrument is.


9. Split-half reliability evaluates a scale's


a. equivalence.


b. stability.


c. internal consistency.


10. Which of the following determines split-half reliability?


a. Spearman Brown correlation


b. Cronbach's alpha coefficient


c. Cohen's Kappa statistic


11. Inter-rater reliability is usually measured by the


a. Pearson's r correlation.


b. Cohen's Kappa statistic.


c. factor analysis.


12. Which of the following is the lowest acceptable Kappa score?


a. 0.4


b. 0.6


c. 0.8


13. Validity in behavioral terms measures how


a. predictable an instrument is between two raters.


b. stable the instrument is over time.


c. well the instrument measures the construct.


14. Which of the following is one type of validity?


a. content


b. internal


c. equivalence


15. The type of validity investigated depends on the


a. size of the sample.


b. frequency of data sampling.


c. purpose of the measure.


16. Which of the following refers to how well a instrument's items truly measure the subject?


a. construct validity


b. content validity


c. criterion-related validity


17. Which content validity index score indicates high validity?


a. +1 to -1


b. 0 - 1


c. 0.8 - 1


18. Which statement about construct validity is accurate?


a. It establishes theoretical soundness of the instrument.


b. It usually requires one other study to assess variable relationships.


c. It requires hypotheses that are independent of other established instruments.