Fig. 4.

Changes in dominance rank causally affected glucocorticoid regulation. Improved Elo rating (i.e. rank) in phase 2 was associated with increased glucocorticoid negative feedback, as measured by (A) dexamethasone suppression of cortisol, and (B) increased sensitivity to acute dexamethasone challenge at both 1.5 h and 4.5 h post-Dex administration. Change in glucocorticoid negative feedback values from phase 1 to phase 2 (A) and change in sensitivity to acute Dex challenge (B) shown on the y-axis, adjusted for phase 1 values and phase 1 Elo rating. Significance (p-values) tests based LM results shown in Table S4.