Figure 2
From: Focal stimulation of the temporoparietal junction improves rationality in prosocial decision-making
GARP illustration and results. *P < .1, **P < .05, ***P < .01. Data in mean ± SEM. (a) GARP implies that if an individual chooses X over Z when the budget line is B1, and Z over Y when the budget line is B2, she cannot choose Y over X when the budget line is B3. (b) Subject level measurements of GARP violations show that anodal participants have the fewest violations. A one-sided t-test of the difference in mean number of GARP violations (anode vs. cathode) rejects the null hypothesis of no difference (P = .0126). (c) Subject level CCEI across treatments. CCEI measures the severity of GARP violations. Violations of GARP are the least severe in the anodal treatment; a one-sided t-test of the difference in mean CCEI (anode vs. cathode) rejects the null hypothesis of no difference (P = .0059).
