The Journal of Educational Psychology whose papers were corrected by the teacher, then returned to them. Curtis and Woods (18) made a much more comprehensive study including various types of objective tests and four methods of correcting papers. They conclude, "When new-type examinations are used as a teaching device, the method of correction which requires the least of the teacher's time, namely that under which the pupils check the incorrect items on their own papers during a discussion of the answers is most profitable" (18, p. 623).