Regression Analyses Hierarchical regression analysis was conducted to evaluate the influence of rash impulsivity on the use of ecstasy by itself (at Step 1), and within the context of reward sensitivity to ecstasy use. (At Step 2). At Step 1, rash impulsivity scores reliably predict change in use of ecstasy, accounting for approximately 22% of variance in the DV; F (1. 941) = 51.00, p < .001. The inclusion of other domains of satisfaction explained an additional 10% variance in the DV; ΔR2 = .025, F Change (2. 025) = 10.69, p <.01.
