Under stress conditions, obtained in the field or experimentally induced, changes occur in the nature and intensity of affective processes (emotions, motivations). Symmetrical changes occur under opposite (comfort) conditions. One of the first procedures for determining temporary stress states consists of administering difficult logical tasks (15 minutes), with erroneous or ambiguous feedback and social pressure. For example, some very difficult Raven Matrices were individually assigned to participants. The first two authors later found another procedure equally effective and even more advantageous for certain aspects: the “drawing recollection” of personal stressful experiences. The corresponding comfort treatments are, firstly, a progressive relaxation session in penumbra; or, in the second case, the “drawing recollection” of personal pleasant and positive experiences. To assess the emotional changes, we prepared seven-point bipolar scales centering on the main opposing emotions. As regards motivations, we used a list of nine motivational systems . The whole set of items made up the so-called Self-Appraisal Scales, administered before and after a specific treatment, thereby obtaining a measure through the differences between the two successive assessments. Factor analyses were conducted for selecting the main emotional and motivational factors. Affective reverberations on cognitive processes were also studied and measured.