The DOI matches its Crossref record; 91 of the 93 references it cites were found in a registry or an index.
Not New, but Nearly Forgotten: the Testing Effect Decreases or even Disappears as the Complexity of Learning Materials Increases
Open accessAbstract
The testing effect is a finding from cognitive psychology with relevance for education. It shows that after an initial study period, taking a practice test improves long-term retention compared to not taking a test and—more interestingly—compared to restudying the learning material. Boundary conditions of the effect that have received attention include the test format, retrieval success on the initial test, the retention interval, or the spacing of tests. Another potential boundary condition concerns the complexity of learning materials, that is, the number of interacting information elements a learning task contains. This insight is not new, as research from a century ago already had indicated that the testing effect decreases as the complexity of learning materials increases, but that finding seems to have been nearly forgotten. Studies presented in this special issue suggest that the effect may even disappear when the complexity of learning material is very high. Since many learning tasks in schools are high in element interactivity, a failure to find the effect under these conditions is relevant for education. Therefore, this special issue hopes to put this potential boundary condition back on the radar and provide a starting point for discussion and future research on this topic.
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“Furthermore, the generation effect is reduced in novice learners, as there are no previous schemas to work with (Leahy et al., 2015; van Gog & Sweller, 2015).”
From Does difficulty moderate learning? A comparative analysis of the desirable difficulties framework and cognitive load theory (2025) · cites this paper as van Gog & Sweller, 2015
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Sweller, J., Ayres, P., & Kalyuga, S. (2011) · Elsevier eBooks · doi:10.1007/978-1-4419-1428-6_446 · Cited by 6,172
Self-citationThe Psychology of Learning and Motivation
(2021) · The Psychology of learning and motivation/The psychology of learning and motivation · doi:10.1016/s0079-7421(21)x0002-3 · Cited by 5,082
Journal of Experimental Psychology: Human Learning and Memory
Bourne, L. E. (1977) · Cited by 4,328
Acquisition of cognitive skill
Anderson, J. R. (1982) · Psychological Review · doi:10.1037/0033-295x.89.4.369 · Cited by 3,663
Test-Enhanced Learning: Taking Memory Tests Improves Long-Term Retention
Roediger, H. L., & Karpicke, J. D. (2006) · Psychological Science · doi:10.1111/j.1467-9280.2006.01693.x · Cited by 2,867
The power of testing memory: Basic research and implications for educational practice
Roediger, H. L., & Karpicke, J. D. (2006) · Perspectives on Psychological Science · doi:10.1111/j.1745-6916.2006.00012.x · Cited by 2,037
Element Interactivity and Intrinsic, Extraneous, and Germane Cognitive Load
Sweller, J. (2010) · Educational Psychology Review · doi:10.1007/s10648-010-9128-5 · Cited by 2,020
Self-citationThe Critical Importance of Retrieval for Learning
Karpicke, J. D., & Roediger, H. L. (2008) · Science · doi:10.1126/science.1152408 · Cited by 1,791
The effect of testing versus restudy on retention: A meta-analytic review of the testing effect.
Rowland, C. A. (2014) · Psychological Bulletin · doi:10.1037/a0037559 · Cited by 1,066 · cited 2×
“According to a Google Scholar search (December 2014), his work has only been cited in nine other publications.”
Karpicke, J. D., Butler, A. C., & Roediger III, H. L. (2009) · Memory · doi:10.1080/09658210802647009 · Cited by 745
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Metadata
- Authors
- van Gog, T., & Sweller, J.
- Affiliations
- Utrecht University (NL)
- UNSW Sydney (AU)
- Corresponding author
- van Gog, Tamara
- Venue
- Educational Psychology Review
- Published
- 2015-05-16
- Volume
- 27
- Issue
- 2
- Pages
- 247-264
- ISSN
- 1040-726X (ISSN-L)
- 1573-336X
- OpenAlex
- W2128915986
- Cited by
- 164
- References
- 93
- Citations by year
- 2026: 11 · 2025: 18 · 2024: 22 · 2023: 21 · 2022: 10 · 2021: 16 · 2020: 13 · 2019: 15 · 2018: 17 · 2017: 7 · 2016: 10 · 2015: 4
- FWCI
- 7.61
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Locations
- Educational Psychology Review (publishedVersion, cc-by)
- EUR Research Repository (Erasmus University Rotterdam) (publishedVersion, other-oa)
- EUR Research Repository (Erasmus University Rotterdam) (submittedVersion, other-oa)
- RePub (Erasmus University Rotterdam) (submittedVersion, other-oa)
- Utrecht University Repository (Utrecht University) (submittedVersion, other-oa)
- Utrecht University Repository (Utrecht University) (submittedVersion)
- Funders
- Nederlandse Organisatie voor Wetenschappelijk Onderzoek (452‐11‐006)
- Topics
- Life Sciences › Neuroscience › Cognitive Neuroscience › Memory Processes and Influences
- Social Sciences › Psychology › Experimental and Cognitive Psychology › Visual and Cognitive Learning Processes
- Social Sciences › Psychology › Developmental and Educational Psychology › Innovative Teaching and Learning Methods
- Keywords
- testing effect, learning complexity, element interactivity, long-term retention, practice tests, restudying, boundary conditions, retrieval practice
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