Optimizing Distributed Practice Theoretical Analysis and Practical Implications
spacing effect, distributed practice, long-term memory, instructional design
Digital Object Identifier (DOI)
More than a century of research shows that increasing the gap between study episodes using the same material can enhance retention, yet little is known about how this so-called distributed practice effect unfolds over nontrivial periods. In two three-session laboratory studies, we examined the effects of gap on retention of foreign vocabulary, facts, and names of visual objects, with test delays up to 6 months. An optimal gap improved final recall by up to 150%. Both studies demonstrated nonmonotonic gap effects: Increases in gap caused test accuracy to initially sharply increase and then gradually decline. These results provide new constraints on theories of spacing and confirm the importance of cumulative reviews to promote retention over meaningful time periods.
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Citation / Publisher Attribution
Experimental Psychology, v. 56, issue 4, p. 236-246
Scholar Commons Citation
Cepeda, Nicholas J.; Coburn, Noriko; Rohrer, Doug; Wixted, John T.; Mozer, Michael C.; and Pashler, Harold, "Optimizing Distributed Practice Theoretical Analysis and Practical Implications" (2009). Psychology Faculty Publications. 1764.