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).
Conflict of interest statement
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.