Two of the greatest problems of research on affective factors, and in particular, research on beliefs, is "what" and "how" we observe. The first difficulty is due to the lack of a clear terminology; but even once it has been clearly decided what to observe, it is not easy to put this into practice. This report describes from a theoretical point of view the results obtained using a new questionnaire appositely designed to overcome some critical points of beliefs' observation. [For complete proceedings, see ED489632.]