Background: Expressed emotion is a construct that has been used for the past three decades to describe family members' criticism, hostility and emotional involvement with a mentally ill relative within the context of family interactions and care-giving. In Western countries this construct is used as an outcome measure of interventions for families of people with schizophrenia or other psychotic disorders, but the use of this construct in Chinese populations is somewhat limited.Objective: To test the reliability and validity of a refined Chinese version of the 52-item Level of
Expressed Emotion Scale (LEE).Methods: A convenience sample of 405 outpatients with psychotic disorders in Hong Kong and one of their family caregivers were recruited. Patients were asked to complete a set of questionnaires twice over a six-month period, including the Chinese version of the LEE, the Specific Level of Functioning scale and the Brief Psychiatric Rating Scale; while their caregivers completed the Family Assessment Device twice and a demographic data sheet at recruitment. This study was aimed at establishing the internal consistency, reproducibility, responsiveness, and construct validity of the LEE. This study also provides evidence that similar to Western studies, the construct of expressed emotion of family members in Chinese population consists of four factor solutions, including intrusiveness, expectations of the patient, attitude towards the illness, and emotional involvement.