{
  "name": "Spacing studies read for this page: one row per claim or figure",
  "desc": "Spacing studies read for this page. Quoted values: figures in the quoted_value column are quoted from the publications in source_doi, at the table or page in source_location. They are not covered by this site's CC BY 4.0 license; the publishers' terms apply, except for the rows from Mawson & Kang (2025), which are data from Mawson & Kang (2025), licensed CC BY 4.0; Table 2 was re-keyed into one row per value. License for this site's selection, arrangement, notes and derived values: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). read_level records how much of each source was read: full text, abstract only, or citation only. Checked 2026-11-06.",
  "lic": "CC BY 4.0",
  "lic_url": "https://creativecommons.org/licenses/by/4.0/",
  "by": "Feedback & Forgetting",
  "url": "https://feedbackandforgetting.com/learning-memory/spaced-repetition/",
  "from": [
    "Cepeda et al. (2006), Psychological Bulletin 132(3): 354–380, doi:10.1037/0033-2909.132.3.354, abstract",
    "Mawson & Kang (2025), Behavioral Sciences 15(6): 771, doi:10.3390/bs15060771, Table 2 and text (CC BY 4.0)",
    "Dunlosky et al. (2013), Psychological Science in the Public Interest 14(1): 4–58, doi:10.1177/1529100612453266, abstract",
    "Karpicke & Roediger (2007), Journal of Experimental Psychology: Learning, Memory, and Cognition 33(4): 704–719, doi:10.1037/0278-7393.33.4.704, abstract",
    "Karpicke & Bauernschmidt (2011), Journal of Experimental Psychology: Learning, Memory, and Cognition 37(5): 1250–1257, doi:10.1037/a0023436, abstract",
    "Cepeda et al. (2008), Psychological Science 19(11): 1095–1102, doi:10.1111/j.1467-9280.2008.02209.x, abstract"
  ],
  "how": "Compiled by Feedback & Forgetting from the data listed",
  "data_by": [
    "Mawson, R. D., & Kang, S. H. K. (2025). The Distributed Practice Effect on Classroom Learning: A Meta-Analytic Review of Applied Research. Behavioral Sciences 15(6): 771, doi:10.3390/bs15060771, CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/)",
    "Cepeda et al. (2006), doi:10.1037/0033-2909.132.3.354; Dunlosky et al. (2013), doi:10.1177/1529100612453266; Karpicke & Roediger (2007), doi:10.1037/0278-7393.33.4.704; Karpicke & Bauernschmidt (2011), doi:10.1037/a0023436; Cepeda et al. (2008), doi:10.1111/j.1467-9280.2008.02209.x (abstract figures quoted)"
  ]
}