Descriptive research is an approach designed to systematically investigate a person, group or patterns of behavior. Its method includes:

Which of the following is most clearly not an example of an incentive?

a. a crossword puzzle b. a pornographic movie c. low blood glucose level d. the smell of rotten eggs

The method of item analysis which looks at the correlation between performance on an item (correct or incorrect) and total test score is

a. the extreme group method. b. the tetrachoric method. c. the point-biserial method. d. the item characteristic curve method.