Figure 2. Differences in integrated survival probabilities.

Survival probabilities using QIC search minus those using RCT search, integrated from the start of the simulation up through the indicated trial step and averaged over all 100 agents and all 50 random landscapes for scattered (A,C) or clustered (B,D) initial distribution and N_p = 320 (A,B) or N_p = 40 (C,D). Hot colors indicate where QIC search outperformed RCT search, and cool colors the opposite. All comparisons were significantly different at the p<0.01 level (2-sided paired t-test), except for regions shown in white. RCT refers to a search strategy modeled after Randomized Controlled Trials; QIC refers to a search strategy modeled after Quality Improvement Collaboratives.