RT Journal Article SR Electronic T1 The Spacing Effects of Multiple Exposures on Memory: Implications for Advertising Scheduling JF Journal of Advertising Research JO J Advert Res FD WARC SP 193 OP 197 DO 10.2501/S0021849909090278 VO 49 IS 2 A1 Alan G. Sawyer A1 Hayden Noel A1 Chris Janiszewski YR 2009 UL http://www.journalofadvertisingresearch.com/content/49/2/193.abstract AB The “spacing effect” refers to the fact that longer intervals between exposures (such as successive presentations of online pop-ups) result in better learning than shorter intervals. This article offers nine empirical generalizations (EGs) about the overall size of the spacing effect and the conditions that make a difference. Our EGs are based on results of a meta-analysis of laboratory experiments in cognitive psychology and marketing. We make several propositions about the implications of our results for planning advertising schedules for the new media as well as more traditional media.