The probability that a <i>p</i>-value in the first (or only) study reported comprises a gross error: co-piloted studies versus non-co-piloted studies.

<p><i>Note</i>. statistical analyses = conducting the statistical analyses (N = 2,247); write up sample details = writing the sample details in the manuscript (N = 2,215); write up results = writing up the results in the manuscript (N = 2,231); check results in manuscript = checking of the results in the manuscript by someone other than the person who wrote up the results in the manuscript (N = 2,185); data sharing at submission = having access to the data at the moment the manuscript was submitted (N = 2,228); data sharing now = having access to the data at the moment the survey was being filled in (N = 2,226).</p>