Aim: Develop two psychometrically sound questionnaires to assess users' and relatives' opinions of Person‐Centred Care. Evaluate the convergence between the perspectives of the different agents involved in Person‐Centred Care in the older people: Users, relatives and staff. Examine the relationships between Person‐Centred Care and care quality and the users' perceived psychological well‐being. Design: We used the psychometric technology involved in the development and analysis of tests for the first objective.