 Current scales are not suited to a direct measure for the elderly with cognitive disorders and are difficult to handle for the care teams. In this context, a visual analog scale was created to answer a single question How are you feeling now, immediately? with the help of pictograms. This study aims to assess the validity and reliability of the Scale of Well-Being Assessment SIWA in french : Echelle dEvaluation Instantanée du Bien-Etre EVIBE in people with Alzheimers disease or a related disease. 