Posterior distributions (blue: placebo, orange: haloperidol) of the change in each parameter from the high magnitude (baseline) to the low magnitude condition (top row: a, Log(k)shift; b, Drift rate coefficientshift; c, Nondecision timeshift; d, Boundary separationshift; e, Starting point biasshift; f, Drift rate maximumshift) and corresponding group differences (bottom row, placebo–haloperidol). Thin (thick) horizontal line denote 95% (85%) highest posterior density intervals.