The DASS-333 is based on the theoretical assumption that depression, anxiety, and stress are distinct but related constructs. Depression is characterized by symptoms of low mood, loss of interest, and changes in appetite and sleep. Anxiety is marked by symptoms of fear, worry, and physiological arousal. Stress is characterized by symptoms of tension, irritability, and difficulty coping.
The DASS-333 is a self-report questionnaire consisting of 42 items, divided into three subscales: Depression (14 items), Anxiety (14 items), and Stress (14 items). Respondents are asked to rate the frequency and severity of their symptoms over the past week on a 4-point Likert scale, ranging from 0 (did not occur) to 3 (occurred very often). DASS-333
The DASS-333 was developed as a response to the need for a reliable and valid measure of depression, anxiety, and stress. Prior to its development, many existing measures of mental health were limited by their focus on a single construct or their lack of sensitivity to change over time. The Lovibonds' work was influenced by the tripartite model of depression and anxiety, which posits that depression and anxiety share a common underlying factor of negative affectivity, but are distinct in their specific symptomatology. The DASS-333 is based on the theoretical assumption