“…Whereas some studies suggest that medial areas (e.g., medial OFC and striatum) are sensitive to relative gains (O'Doherty et al, 2001;Nieuwenhuis et al, 2005) and lateral areas (e.g., lateral OFC and anterior insula) for loss or punishment (O'Doherty et al, 2003a;Ullsperger and von Cramon, 2003), other studies found that activity of the caudate nucleus and insula was independent of the valence of outcomes (Elliott et al, 2000;Delgado et al, 2003). To a certain extent, these mixed results highlight some of the important distinctions in human decision-making research, such as expected values and utilities (von Neumann and Morgenstern, 1944;Knutson et al, 2005;Tobler et al, 2006), framing and prospect theory (Kahneman and Tversky, 1979;Tversky and Kahneman, 1981;Trepel et al, 2005), and cognitive-affective interaction (Loomes and Sugden, 1982;Mellers, 2000;Ursu and Carter, 2005).…”