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QUESTION 19 Seaman Sanchez had a hearing impairment, but passed the test to become a radio operator because the test did not measure hearing acuity. What does this represent? O a. criterion/ predictor confusion O b. construct-irrelevant variance O c. criterion-related evidence for validity O d. construct underrepresentation QUESTION 20 The difference between Likert scales and category formats is that O a. category formats are used only in health settings. O b. category formats tend to have a smaller number of choices. O c. Likert scales tend to have a smaller number of choices. O d. category formats tends to be dichotomous while Likert scales tends to be polytomous. QUESTION 21 The extreme group method and the point biserial method are both used to estimate O a. reliability. O b. validity. O c. difficulty. O d. discriminability