Stanlee, L. S., & Popham, W. J. (1960). Quizzes' contribution to learning. Journal of Educational Psychology, 51(6), 322-325.
http://dx.doi.org/10.1037/h0048442
An introductory class in educational psychology was divided into 4 sections of 26 students each. The classes were taught by the same instructor. One class was given no quizzes. The others were given weekly quizzes either graded by the instructor and returned to the students or graded by the students themselves, or read to the class and answered by the instructor. The quizzes tended to increase achievement but the increase was lost by the end of the course. From Psyc Abstracts 36:01:1KB22S. (PsycINFO Database Record (c) 2016 APA, all rights reserved)