Figure 4.

Cocaine use (in dollars per use) over the previous 30 days for unimpaired insight and impaired insight urine positive cocaine subjects (unimpaired insight: n = 8; impaired insight: n = 8) and urine negative cocaine subjects (unimpaired insight: n = 17; impaired insight: n = 9). The significant effect of Insight on cocaine spending uniquely for the urine negative subjects (impaired insight > unimpaired insight) is indicated by an asterisk. Although we report the raw dollar amounts to enhance figure clarity, between-group comparisons used the non-parametric Mann–Whitney U-test due to violations of normality and the presence of outliers. Error bars represent standard error of the mean.