En diferentes experimentos en ratas realizados en nuestro laboratorio hemos observado que, si los animales son expuestos a situaciones frustrantes por la demora de una recompensa palatable esperada, incrementan significativamente su ingesta ante su posterior re-encuentro, en comparación con un control sin demora previa. Hasta el momento hemos explorado el fenómeno en ratas macho privadas al 83% del peso ad libitum, al igual que en la mayoría de los trabajos previos sobre motivación e ingesta. No obstante, estas particularidades reducen la validez externa del fenómeno como un modelo animal de episodios de atracón, dado que los mismos son más prevalentes en mujeres y pueden acontecer sin déficit energético previo. Se realizaron dos experimentos con 40 ratas Wistar cada uno utilizando, como reforzadores, soluciones azucaradas al 32%. El objetivo fue evaluar la presencia del fenómeno en hembras y animales no privados de alimento. En el primero se emplearon machos sin privación. En el segundo, hembras con privación de alimento. En ambos estudios, se replicó el incremento de la ingesta tras eventos previos de frustración por demora del refuerzo. Estos datos contribuyen a incrementar la validez externa del modelo. Palabras clave Ingesta - Frustración - Atracón - Rata ABSTRACT STRESS AND BINGE EPISODES: A NEW ANIMAL MODEL FOR THE STUDY OF ITS RELATION We have observed in different experiments in rats performed in our laboratory that the animals exposed to frustrative situations due to the delay of an expected palatable reward significantly increase its intake when they re-encounter the reward, in comparison with a control condition without a previous delay. We have explored this effect in male rats with food deprivation at the level of 83% of their ad libitum body weight, as in most previous studies on motivation and intake. However, these particularities reduce the external validity of the phenomenon as an animal model of binge episodes, since they are more prevalent in women and can occur without previous energy deficit. Two experiments were performed in 40 Wistar rats using 32% of sucrose solutions as reinforcements.The objective was to evaluate the presence of the effect in females and non-food deprived animals. In the first experiment, we evaluated non-deprived male rats. In the second one, we used females with food deprivation. In both studies, we replicated the effect and observed an increment in the intake of sucrose solution after previous events of frustration due to reward delay. These data contribute to increase the external validity of this animal model. Key words Intake - Frustration - Binge - Rat