Discriminación en el condicionamiento del sobresalto potenciado por el miedo en humanos
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En un experimento de sobresalto potenciado por el miedo, los participantes fueron entrenados en una tarea de discriminación donde una imagen A se emparejó con un pulso eléctrico, mientras que otra imagen, B, se presentó por sí sola (i.e., A+ B-). En una prueba, la respuesta de sobresalto, medida como parpadeo, fue evaluada al presentar un soplo de aire o un ruido blanco en presencia o ausencia de las imágenes A y B. Los resultados muestran un mayor parpadeo al soplo de aire en presencia de A que en presencia de B, y en ausencia de cualquier estímulo, solo en aquellos participantes que percibieron el pulso eléctrico como altamente doloroso. En conclusión, estos hallazgos sugieren que el miedo condicionado se relaciona linealmente con la intensidad del pulso eléctrico.
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