Universidad Anahuac Mexico Sur 1 article published in JoVE Behavior Three Laboratory Procedures for Assessing Different Manifestations of Impulsivity in Rats Rodrigo Sosa*1, Pablo Saavedra2, Roberto Niño de Rivera1, Gustavo Lago1, Patsy Moreno1, Oscar Galicia-Castillo1, César Hernández-Guerrero3, Mario Buenrostro-Jáuregui*1 1Laboratorio de Neurociencias, Universidad Iberoamericana, 2Departamento de Psicología, Universidad Anáhuac México Sur, 3Departamento de Salud, Universidad Iberoamericana We present three protocols that assess different forms of impulsivity in rats and other small mammals. Intertemporal choice procedures evaluate the tendency to discount the value of delayed outcomes. Differential reinforcement of low rates and feature-negative discrimination evaluate response inhibition capacity with and without punishment for inappropriate responses, respectively.