Psicothema was founded in Asturias (northern Spain) in 1989, and is published jointly by the Psychology Faculty of the University of Oviedo and the Psychological Association of the Principality of Asturias (Colegio Oficial de Psicología del Principado de Asturias).
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Psicothema, 2007. Vol. Vol. 19 (nº 3). 375-380

Recognition memory for pictorial stimuli: Biasing effects of stimulus emotionality

José Fermández-Rey and Jaime Redondo

Universidad de Santiago de Compostela

The possibility that stimulus emotionality might influence recognition bias in a long-term memory task was studied with respect to both the valence and arousal dimensions of emotion. For this purpose, we used 108 International Affective Picture System pictures that were representative of all regions of this two-dimensional space. Signal detection theory analysis was applied using A'and B''D as discrimination and bias measures, respectively. In general, the results showed that greater discrimination was accompanied by a response bias that was more conservative for pleasant and for unarousing pictures than for unpleasant and for arousing ones. These results provide new evidence in connection with the emotion-induced recognition bias in long-term memory performance.

Memoria de reconocimiento para estímulos pictóricos: sesgos inducidos por la emocionalidad del estímulo. En la presente investigación se estudió la posibilidad de que la emocionalidad del estímulo, tanto en la dimensión de valencia como en la de arousal, pudiera afectar al sesgo de reconocimiento en una tarea de memoria a largo plazo. Para ello se emplearon 108 imágenes del IAPS (International Affective Picture System) representativas de todas las regiones del espacio afectivo bidimensional. Los análisis basados en la teoría de detección de señales, utilizando A' y BD como medidas de discriminación y sesgo, respectivamente, mostraron una mayor discriminación y un sesgo de respuesta más conservador para las imágenes agradables y las desactivadoras en comparación con las desagradables y las activadoras. Estos resultados proporcionan nueva evidencia con respecto al sesgo de reconocimiento inducido por la emoción en el rendimiento de memoria a largo plazo.


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