Cited by 185Psychology Research and BibliometricsMeta-analysis and systematic reviewsMemory Processes and Influences

Using Nonnaive Participants Can Reduce Effect Sizes

Chandler, Jesse, Paolacci, Gabriele, Peer, Eyal, Mueller, Pam, Ratliff, Kate A.·2015·Psychological Science

Abstract

Although researchers often assume their participants are naive to experimental materials, this is not always the case. We investigated how prior exposure to a task affects subsequent experimental results. Participants in this study completed the same set of 12 experimental tasks at two points in time, first as a part of the Many Labs replication project and again a few days, a week, or a month later. Effect sizes were markedly lower in the second wave than in the first. The reduction was most pronounced when participants were assigned to a different condition in the second wave. We discuss the methodological implications of these findings.

Integrity signals

Registry

Crossref · 10.1177/0956797615585115

Cites

29 of 29 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Chandler, J., Paolacci, G., Peer, E., Mueller, P., & Ratliff, K. A.
Affiliations
  • University of Michigan (US)
  • Erasmus University Rotterdam (NL)
  • Graduate School of Business Administration, Bar-Ilan University
  • Princeton University (US)
  • University of Florida (US)
Venue
Psychological Science
Published
2015-06-10
Volume
26
Issue
7
Pages
1131-1139
ISSN
  • 0956-7976 (ISSN-L)
  • 1467-9280
OpenAlex
W2162475434
Cited by
185
References
29
Citations by year
2026: 6 · 2025: 20 · 2024: 10 · 2023: 15 · 2022: 10 · 2021: 23 · 2020: 20 · 2019: 21 · 2018: 14 · 2017: 27 · 2016: 15 · 2015: 3
FWCI
29.35
Type
journal article
Language
en
Open access
closed
Locations
  • Psychological Science (publishedVersion)
  • PubMed (publishedVersion)
  • EUR Research Repository (Erasmus University Rotterdam) (publishedVersion)
  • EUR Research Repository (Erasmus University Rotterdam) (submittedVersion)
Topics
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Psychology Research and Bibliometrics
  • Social Sciences › Decision Sciences › Statistics, Probability and Uncertainty › Meta-analysis and systematic reviews
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory Processes and Influences
Keywords
replication, task familiarity, within-participant design
MeSH terms
Adult, Female, Humans, Male, Patient Participation, Patient Selection

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review