Behavioral and neural effects of incentive motivation. (A) In all experiments, the detection sensitivity measure dprime (dp) increased as a function of absolute incentive magnitude. Red line: experiment 1 of Engelmann and Pessoa (2007); light orange line: experiment 2 of Engelmann and Pessoa (2007); dark red line: behavioral results of Engelmann et al. (2009). Parallel increases in evoked brain responses observed in the study by Engelmann et al. (2009) during the cue (B) and target (C) task phases in three types of regions, namely attentional, visual and reward-related (see Figure 2 for some of the sites). Results were obtained by pooling the responses from regions within these three networks. Net = network.