OP) constitute the basis for this study; the Dispositional Optimism, the Hope Theory, and the OP Explanatory Style.

Three different theoretical frameworks of optimism-pessimism (hereunder OP) constitute the basis for this study; the Dispositional Optimism, the Hope Theory, and the OP Explanatory Style. Analysis of the similarities and the differences between these theories reveals subtle differences that might lead to one unified theory. Within this theory two objectives were investigated: (a) the measure OP's stability in the different content domains, and (b) the measure of consistency between the cognitive OP expectancies (hereunder, plausibility) and the positive-negative emotions. 244 participants of various ages (M = 35.97; SD = 18.35) completed two questionnaires: (1) An upgrade of existing questionnaires (2) A questionnaire to assess 5 events; 3 of high personal involvement for the individual (expected surgery), and 2 of low personal involvement (National economic situation). The results of the study show that: (a) The OP variable is composed of two separate factors: one of high personal involvement, and the second of low personal involvement. In each of them the stability in the various content domains (cross-domain) is maintained; (b) Lower plausibility-emotions correlation is found in high personal involvement than in low personal involvement. (c) In events of high personal involvement a high positive correlation is found between the emotions and the OP grade. However, in events with low personal involvement, the correlation between emotions and OP grade is positive, but significantly lower. The results emphasize the role of the emotions as one of the sources of information processing for the OP evaluation. High Emotional impact provides different information processing than low emotional impact