The current investigation, framed within the emotional cognitive science field, was conducted with three patients with major depression. They participated in a therapeutic process which involved EMDR (Eye Movement Desensitization and Reprocessing). Data were obtained in the clinical practice through a longitudinal one subject study design, including: emotional valence identification within affective priming experiments; and depressive emotional representation studies, the data of which was analyzed using multi-dimensional scaling. The first ones had the purpose of observing the therapeutic impact over the emotional cognitive bias mechanism regarding depresogenic words related to traumatic experiences; and the second, to analyze modifications on depressive schemata. The results showed that EMDR had a positive effect both on emotional cognitive processing and on long-term memory conceptual organization. In the discussion section, interesting remarks are made on the incorporation of emotional cognitive science tools to the EMDR clinical practice.
