1. An investigator has developed a new assay to detect precancerous lesions of the eyeball. The new test is much less expensive and can be done during a simple eye exam, while the older, gold standard test requires that a small scraping from the eyeball be taken. By comparing the new assay to the gold standard, what is the investigator assessing?

a. Internal consistency

b. Content validity

c. Equivalency

d. Criterion-related validity

e. Construct validity

f. Stability

2. An investigator wanted to evaluate whether the Spanish translation of her study questionnaire was consistent with the English version. She administered the questionnaire to a group of bilingual subjects, who completed both the Spanish and the English versions of the questionnaire. What concept is being evaluated?

a. Equivalency

b. Internal consistency

c. Stability

d. Criterion-related validity

e. Content validity

f. Construct validity

3. An investigator plans to use a new questionnaire that has ten items addressing the concept of "emotional well-being," all measured on a Likert scale (0-5, where 0 indicates no agreement and 5 indicates total agreement). He would like to determine to what extent all 10 items are measuring the same thing. Which of the following statistics should he calculate?

a. Chronbach's alpha

b. Kuder-RIchardson statistic

c. Kappa coefficient

d. Pearson's correlation coefficient

e. Pearson's chi-square