Figure 4

Partial correlations (left) show that reduced dopamine turnover (DA TR: Ln HVA/DA) is associated with enhanced picture completion scores in healthy subjects (r = -0.35, P = 0.01). Increasing DA TR (middle) is associated with improved verbal recall in patients with schizophrenia (r = +0.29, P = 0.008). For patients with high ratings for ideas-of reference (IoR: right) increased DA activity was associated with promoting the speed of switching between sets on the trail-making test (r = +0.34, P = 0.015).