Placebo-effect analyses
Placebo-effect was inferred from participants’ self-reported estimate of the number of standard shots contained in their drink that session. For placebo dosing sessions, if participants indicated that they received any amount of alcohol, we consider them to have had a placebo-effect, and those reporting zero standard shots we considered to have had no placebo-effect. Two participants were excluded from this analysis due to missing subjective reports at the placebo study visit. To compare the angle metric between those with (n = 23) and without (n = 23) placebo-effect, we used the Watson Williams test from Python’s pycircstat package