This is a corrigendum for Measuring the crowd within again: a pre-registered replication study.
The target sample sizes for achieving a 0.95 power level reported in the Sampling Plan section are incorrect. Specifically, the target sample sizes in the immediate condition should be n = 452 and n = 44 (instead of the reported n = 439 and n = 31); the target sample sizes in the delayed condition should be n = 61 and n = 26 (instead of the reported n = 48 and n = 13).
As the effective samples sizes, as reported in the Sample section (n = 471 in the immediate condition; n = 140 in the delayed condition), exceed the corrected target sample sizes in both conditions, the errors are non-consequential.
Additional Matlab code for the sampling plan can be found on the Open Science Framework (osf.io/ivfu6).
Statements
Conflict of interest
The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.
Summary
Keywords
crowd within, registered replication study, power analysis, wisdom of the crowd, effect size
Citation
Steegen S, Dewitte L, Tuerlinckx F and Vanpaemel W (2015) Corrigendum: Measuring the crowd within again: a pre-registered replication study. Front. Psychol. 6:238. doi: 10.3389/fpsyg.2015.00238
Received
16 February 2015
Accepted
16 February 2015
Published
12 March 2015
Volume
6 - 2015
Edited by
Rolf Antonius Zwaan, Erasmus University Rotterdam, Netherlands
Reviewed by
Rene Zeelenberg, Erasmus University Rotterdam, Netherlands
Copyright
© 2015 Steegen, Dewitte, Tuerlinckx and Vanpaemel.
This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
*Correspondence: Sara Steegen, sara.steegen@ppw.kuleuven.be
This article was submitted to Cognition, a section of the journal Frontiers in Psychology
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