Análisis Experimental de la Conducta

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Autodiscriminación condicional e interacción social

Resumen de un trabajo de Penagos-Corzo et al (2015), miembro fundador de RedLACC

Ratas interacción socialThe experiment reported here uses a conditional self-discrimination task to examine the influence of social interaction on the facilitation of self- discrimination in rats. The study is based on a previous report (Penagos- Corzo et al., 2011) showing positive evidence of such facilitation, but extending the exposition to social interaction conditions prior to training. Specifically, rats were assigned to three conditions with different levels of social interaction and exposed to two conditional self-discrimination tasks, under an avoidance and positive reinforcement paradigm, where they had to discriminate their own internal state (with or without methylphenidate). Our results indicate that conditional self-discrimination was higher in groups with higher social interaction than in those with lower interaction and support the conclusion that self-discrimination learning curves for different degrees of social interaction positively increased with number of sessions and level of interaction

El artículo completo puede descargarse en ResearchGeate

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Ajuste de incentivos y hábitos en anfibios

IMG_8033

Resumen de un trabajo de Muzio et al. (2011), miembro fundador de RedLaCC

Toads (Rhinella arenarum) received training with a novel incentive procedure involving access to solutions of different NaCl concentrations. In Experiment 1, instrumental behavior and weight variation data confirmed that such solutions yield incentive values ranging from appetitive (deionized water, DW, leading to weight gain), to neutral (300 mM slightly hypertonic solution, leading to no net weight gain or loss), and aversive (800 mM highly hypertonic solution leading to weight loss). In Experiment 2, a downshift from DW to a 300 mM solution or an upshift from a 300 mM solution to DW led to a gradual adjustment in instrumental behavior. In Experiment 3, extinction was similar after acquisition with access to only DW or with a random mixture of DW and 300 mM. In Experiment 4, a downshift from DW to 225, 212, or 200 mM solutions led again to gradual adjustments. These findings add to a growing body of comparative evidence suggesting that amphibians adjust to incentive shifts on the basis of habit formation and reorganization.

El artículo completo puede consultarse PLOSONE.