Background: The negative interactions between Alzheimer's disease (AD) patients and their caregivers may provoke criticism, hostility, and emotional overinvolvement that characterise highly expressed emotion (EE) attitudes. In this study, we hypothesised that affective temperament traits of AD caregivers are related to their high EE levels independent from other patient and caregiver characteristics. Methods: Eighty AD patients were assessed through Clinical Dementia Rating Scale (CDR), and MiniāMental State Examination.