Abstract
Introductory Psychology students were graded on four tests using multiple-choice questions with an explicit option to explain their answers (E-option), and were later asked how they would compare this format with short answer, essay, true/false, fill-in-the-blank, and regular multiple-choice. Students rated the E-option and short-answer formats as most preferred, and less frustrating and anxiety producing than other formats (p <. 05). Of 41 6 students, 173 used the E-option, averaging less than one explanation per test over the four tests. During the course, only 30 points were gained and 5 points lost due to E-option use. The E-option seems to be an efficient and humane technique for testing large classes.
