Putting evidence‐based claims to the test: A multi‐site classroom study of retrieval practice and spaced practice

Summary Retrieval practice and spacing out studying help increase learning. Introductory Psychology students at nine colleges/universities took quizzes with more (RP+) or less (RP−) retrieval practice and more (SP+) or less (SP−) spacing between quizzes. We compared ( N = 351) scores on class exams and on a standardized test. We also measured key student variables (e.g., depth of processing). GPA predicted a significant portion of variance in...