"In an earlier paper (Handler & Honts, 2008) we offered a theoretical expla­ nation of the physiological changes observed in PDD testing. We noted that there were likely emotional and cognitive pathways that were involved in the production of observed PDD phenomena. The emotional pathway could be characterized as generally unconscious and automatic while the processes in the cognitive pathway were relatively more accessible to the conscious­ ness of the subject. Our earlier work focused on the cognitive pathway. Here we would like to offer some theoretical speculations about the unconscious emotional automatic pathways suggesting conditioning may play a role in generation of arousal in the PDD context."(...)