Progressively increasing the difficulty of a Pavloviandiscrimination in a voluntary exposure to toxin paradigmwith rats attenuates the magnitude of the easy-to-hard effect
Rats received two stages of Pavlovian discrimination training with two flavor stimuli: acompound consisting of saccharin mixed with 0.15 M lithium chloride (LiCl), and the sac-charin alone. The concentration of the saccharin solution (i.e., the common element sharedby the stimuli to be discriminated...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2015 |
| País: | España |
| Institución: | Universidad del País Vasco |
| Repositorio: | Addi. Archivo Digital para la Docencia y la Investigación |
| OAI Identifier: | oai:addi.ehu.eus:10810/75540 |
| Acceso en línea: | http://hdl.handle.net/10810/75540 |
| Access Level: | acceso abierto |
| Palabra clave: | progressive training easy-to-hard effect discrimination aversion ingested lithium rats |
| Sumario: | Rats received two stages of Pavlovian discrimination training with two flavor stimuli: acompound consisting of saccharin mixed with 0.15 M lithium chloride (LiCl), and the sac-charin alone. The concentration of the saccharin solution (i.e., the common element sharedby the stimuli to be discriminated) was relatively high in Stage 2 (1.2%). Groups differedin the pre-training that they received in Stage 1. Group Progressive (PROG) was pretrainedin easier versions of the discrimination of Stage 2. The difficulty of these discriminationswas gradually increased by progressively increasing the initial concentration of saccha-rin (0.15%). Group PROG learned the hardest discrimination faster than a control group(HARD) that was trained in this discrimination in both Stages 1 and 2 (Experiment 1). Wealso observed that the enhancement of learning observed in Group PROG was less thanthat observed after continuous pre-training with the easiest version of the discrimination(Group CONT; Experiment 2). We discuss the implications of these results in relation toother previous demonstrations of the easy-to-hard effect. |
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