In experimental psychology, the proportion of the top third of the class that correctly answered the last question of the final was .93 while .89 of the bottom third of the class answered correctly. The professor should decide not to include this question in the next final because the discrimination index indicates
a. negative discrimination.
b. chance level performance.
c. that students were incorrectly prepared.
d. that the item does not discriminate well.
Question 2
Who developed the Sixteen Personality Factor Questionnaire?
a. J.R. Guilford
b. R.B. Cattell
c. L.L. Thurstone
d. Sam Beck
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Leonardo da Vinci, Study of Human Proportion: The Vitruvian Man.
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