Fig. 5
From: Judgment of crowds as emotional increases with the proportion of black faces
Posterior predictive density plots for Experiment 1–2 simple effects of race ratio on starting-point bias (A) and drift rate (B) for happy and angry crowd-emotion valences. Vertical black bars are the 95% most credible values for the mean difference between race conditions. With the exception of the contrast between the angry valence 75 and 50% Black trials, all estimates of starting-point bias contained the null-point value, suggesting that starting-point bias did not differ across race proportions. Conversely, drift rates were notably larger than the null-point when comparing the 50 and 75% Black trials to the 25% Black trials, suggesting that evidence accumulated faster toward emotional inferences when crowds were composed of 50% or more Black individuals.
