The amount of exposure determines generalization in animal perceptual learning using short inter-stimulus intervals Recio, Sergio, A. Iliescu, Adela, F. Brugada Sauras, Isabel de Perceptual learning Associative learning Discrimination Exposure effects Rats While human and animal perceptual learning (PL) had sometimes yielded similar results, there is evidence of some striking discrepancies. It has been proposed that such differences reflect the existence of multiple species-specific mechanisms, especially regarding to humans. However, it is also possible that those discrepancies are caused by procedural differences. One of the most important differences between PL experiments in humans and laboratory animals is the inter-stimulus interval (ISI) used. In the former, short ISI reliably produces PL, while in the latter reducing the ISI leads to paradoxical results. We report two experiments with rodents to prove that the length of exposure is a key element under such conditions. In the first experiment we replicated the paradoxical results already present in the literature using a short exposure. In a follow up experiment, we increased the exposure trials and obtained normal PL in animals using short ISI. Our results support current associative theories of PL and highlight the impact of procedural differences on this phenomenon. 2021-03-15T07:22:26Z 2021-03-15T07:22:26Z 2019 info:eu-repo/semantics/article Recio SA, Iliescu AF, de Brugada I, The amount of exposure determines generalization in animal perceptual learning using short inter-stimulus intervals, Behavioural Processes (2019), https://doi.org/10.1016/j.beproc.2019.103900 http://hdl.handle.net/10481/67198 https://doi.org/10.1016/j.beproc.2019.103900 eng http://creativecommons.org/licenses/by-nc-nd/3.0/es/ info:eu-repo/semantics/openAccess Atribución-NoComercial-SinDerivadas 3.0 España Behavioural Processes (Elsevier)