Statistical details of the percentages of stimuli at pain threshold level rated as painful: Top: Means and standard deviations of the pain perception [%] of the CO₂ stimuli at pain threshold level (“Group 1”: far-from-threshold stimuli randomly announced as “no pain”, “stimulus”, “pain”; “Group 2”: far-from-threshold stimuli correctly announced, i.e. “no pain” and “pain”).

*: The value of η p 2 multiplied with 100 gives the percentage of variance explained by the respective factor [47]. Bottom: Detailed results of the analyses of variance for repeated measures and the estimates of the respective effect sizes partial eta squared, η p 2 . Results are provided for main effects and interactions, with the F-value followed by the number of degrees of freedom in parentheses and the p-value.