Fig 1. Prevalence of the measures used and reported to avoid risks of bias by the participants to online survey.

(A) Prevalence of use of bias avoidance measures during experimental conduct and reporting in the participants’ latest publication (percentages are corrected for ‘no answer’, ‘does not apply to last manuscript’ and ‘have not published so far’. (B) Internal validity scores (IVS) for experimental conduct and reporting in publications.