Generalized Estimating Equation Results
To formally estimate the varying effect of environmental change on performance across group conformity levels, we conducted a set of generalized estimating equation (GEE) analyses, reported in Table 
Generalized estimation equation (GEE) analyses of group performanceCoefficients represent logit estimates. Group clustered standard errors in parentheses; *** Models 2–4 fit Eq. 1 to the data, including the stable stage and the 20, 30, and full 40 rounds after the change, respectively. These separate analyses allow us to address the fact that as time elapses since the change, the game reverts to a new stable state. The coefficients of the interaction between change and conformity level are presented first (in bold). All three estimates are negative and statistically significant, suggesting that the negative effect of change on performance is greater for HiConf groups than for LoConf groups (the reference category). In contrast, the coefficients of the interaction between individuals and LoConf groups (Change × Individual) are small and statistically insignificant, suggesting that the effect of change on the performance of individuals and LoConf groups is not significantly different.Note that the GEE results indicate no significant differences between the performance of LoConf and HiConf groups in the stable stage of the game (rounds 1–61), given the insignificant coefficients of Figure 
Mean performance across conditions throughout the game. GEE estimates for 10 sets of 10 rounds (CI = 1SE)