Introducción: Los eventos de frustración por demora del reforzador generan un incremento de la ingesta ante su re-encuentro. Este fenómeno podría sostenerse en cambios del valor hedónico (liking) o la saliencia de incentivo (wanting). Objetivo: Evaluar si el fenómeno de incremento de la ingesta genera alteraciones en el liking. Método: Se utilizaron ratas Sprague Dawly adultas privadas al 83% del peso ad libitum. Se expuso a tres grupos de animales a una solución azucarada al 32% durante 5 ensayos de 5 min c/u. El sexto día, el grupo No-Demora accedió inmediatamente al 32%, mientras que Demora-10 y Demora-2 accedieron luego de 10 o 2 min de exposición al bebedero vacío, respectivamente. El día siete, todos los animales accedieron sin demora al 32%. Este ciclo compuesto por un ensayo con demora y otro sin omisión se repitió cinco veces. Discusión: Se replicó el fenómeno en medidas directas e indirectas de consumo. No obstante, solo se halló un aumento del liking en el último ensayo de demora. El incremento de la ingesta por un evento previo de frustración no involucraría un aumento del componente motivacional hedónico, sugiriendo que el fenómeno se sostendría por un aumento de la saliencia del incentivo o wanting. Palabras clave Ingesta - Frustración - Liking - Rata ABSTRACT MOTIVATIONAL MECHANISMS INVOLVED IN INCREASED INTAKE CAUSED BY PREVIOUS FRUSTRATION EVENTS Introduction: Reinforcer delay frustration events generate increased intake upon re-encounter. This phenomenon could be supported by changes in hedonic value (liking) or incentive salience (wanting). Objective: To evaluate whether the phenomenon of increased intake generates alterations in liking. Methods: Adult Sprague Dawley rats deprived of 83% of their ad libitum weight were used. Three groups of animals were exposed to a 32% sugar solution for 5 trials of 5 minutes each. On the sixth day, the No-Delay group accessed the 32% solution immediately, while the Delay-10 and Delay-2 groups accessed it after 10 or 2 minutes of exposure to the empty drinking bottle, respectively. On day seven, all animals accessed the 32% solution without delay. This cycle, consisting of one trial with a delay and one trial without omission, was repeated five times. Discussion: The phenomenon was replicated in direct and indirect measures of consumption. However, an increase in liking was found only in the last trial with omission. Increased intake from a previous frustration event would not involve an increase in the hedonic motivational component, suggesting that the phenomenon would be sustained by an increase in the salience of the incentive or wanting. Keywords Intake - Frustration - Liking - Rat