“…Further, it is possible that adolescent animals experienced more stress given that they were given a shorter time to acclimate to the vivarium prior to the initiation of experimental procedures than their adult counterparts. Interestingly, the effects of stress on the development and expression of CTAs are mixed, with reports of stress potentiating CTAs (Bowers, Gingras, & Amit, 1996; Lasiter & Braun, 1981) and in some cases, stress having no effect (Bowers et al, 1996; Holder, Yirmiya, Garcia, & Raizer, 1989; Roma, Davis, Kohut, Huntsberry, & Riley, 2008). If the adolescent animals in the present assessment were under more stress, it might be expected that they would show stronger MDMA-induced aversions.…”