title: Monetary reward magnitude effects on behavior and brain function during goal-directed behavior.
abstract: Reward may modulate the cognitive processes required for goal achievement, while individual differences in personality may affect reward modulation. Our aim was to test how different monetary reward magnitudes modulate brain activation and performance during goal-directed behavior, and whether individual differences in reward sensitivity affect this modulation. For this purpose, we scanned 37 subjects with a parametric design in which we varied the magnitude of monetary rewards (€0, €0.01, €0.5, €1 or €1.5) in a blocked fashion while participants performed an interference counting-Stroop condition. The results showed that the brain activity of left dorsolateral prefrontal cortex (DLPFC) and the striatum were modulated by increasing and decreasing reward magnitudes, respectively. Behavioral performance improved as the magnitude of monetary reward increased while comparing the non reward (€0) condition to any other reward condition, or the lower €0.01 to any other reward condition, and this improvement was related with individual differences in reward sensitivity. In conclusion, the locus of influence of monetary incentives overlaps the activity of the regions commonly involved in cognitive control.
authors.affiliation: Departamento de Psicología Básica, Clínica y Psicobiología, Universitat Jaume I, Castellón, Av. de Vicent Sos Baynat, s, /n 12071, Castelló de la Plana, Spain.
authors.forename: P
authors.initials: P
authors.lastname: Rosell-Negre
authors.affiliation: Departamento de Psicologia y Sociología, Universidad de Zaragoza, Zaragoza, Pedro Cerbuna, 12 50009, Zaragoza, Spain.
authors.forename: J C
authors.initials: JC
authors.lastname: Bustamante
authors.affiliation: Departamento de Psicología Básica, Clínica y Psicobiología, Universitat Jaume I, Castellón, Av. de Vicent Sos Baynat, s, /n 12071, Castelló de la Plana, Spain.
authors.forename: P
authors.initials: P
authors.lastname: Fuentes-Claramonte
authors.affiliation: Departamento de Psicología Básica, Clínica y Psicobiología, Universitat Jaume I, Castellón, Av. de Vicent Sos Baynat, s, /n 12071, Castelló de la Plana, Spain.
authors.forename: V
authors.initials: V
authors.lastname: Costumero
authors.affiliation: Unidad Docente Medicina Familiar y Comunitaria, Instituto Aragonés de Ciencias de la Salud (IACS), Avenida San Juan Bosco, nº13, 50009, Zaragoza, Spain.
authors.forename: S
authors.initials: S
authors.lastname: Benabarre
authors.affiliation: Departamento de Psicología Básica, Clínica y Psicobiología, Universitat Jaume I, Castellón, Av. de Vicent Sos Baynat, s, /n 12071, Castelló de la Plana, Spain. barros@uji.es.
authors.forename: A
authors.initials: A
authors.lastname: Barrós-Loscertales
mesh_terms: D000328:Adult; D001921:Brain / Q000000981:diagnostic imaging / Q000502:physiology*; D001931:Brain Mapping; D056344:Executive Function / Q000502:physiology*; D005260:Female; D006040:Goals; D006801:Humans; D007206:Individuality; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009483:Neuropsychological Tests; D011930:Reaction Time / Q000502:physiology*; D012201:Reward; D055815:Young Adult
keywords: Reward magnitude; Reward sensitivity; Stroop; fMRI