Correlations within and between different measures of decision making, flexibility, impulsivity and risk-taking behaviours.

The three behavioral processes included in the model, reward and risk seeking, behavioral flexibility, were unrelated. Impulsive actions and perseverative responses in different experimental contexts were positively correlated. These parameters (except FI activity) were positively correlated with risk taking, and were independent from inhibitory control capacities (FCN schedule) and impulsive choice (DDT). Significant correlations are shown in bold. RGT: rat gambling task; FCN16: fixed consecutive number schedule of reinforcement; FI: fixed- interval; EXT: extinction: DDT: delay discounting task. Pearson’s correlation test; *, p<.05; **, p<.01; ***, p<.001.