The DASS-167 consists of 42 items, divided into three subscales:
- This subscale includes 14 items that assess the respondent's experiences of depression, such as sadness, meaninglessness, and lack of interest in activities.
- Comprising 14 items, this section evaluates symptoms of anxiety, including nervousness, tension, and fear.
- The final 14 items measure the respondent's experiences of stress, such as irritability, impatience, and difficulty relaxing.
Each item is rated on a 4-point severity/frequency scale, ranging from 0 (did not apply to me at all) to 3 (applied to me very much, or most of the time). The scores for each subscale are calculated by summing the ratings for the relevant items, and then multiplying by a factor to provide a standardized score.
The scoring process involves summing the scores of the items within each subscale and then multiplying by a factor (typically 2 for research and clinical purposes) to obtain a final score for depression, anxiety, and stress. These scores can then be interpreted in terms of severity:
- Scores that fall within a certain range (usually 0-9 for depression, 0-7 for anxiety, and 0-14 for stress) suggest that the individual is experiencing normal levels of depression, anxiety, and stress.
- Higher scores indicate increasing levels of depression, anxiety, and stress, categorized as mild, moderate, or severe, depending on the specific cut-off scores used.
The DASS-167 has been widely used in both clinical and research contexts due to its reliability and validity. It serves several purposes:
- Helps clinicians assess the severity of depression, anxiety, and stress in patients, which can inform treatment decisions.
- Useful for tracking changes in symptoms over time, allowing for the evaluation of treatment efficacy.
- Provides a standardized measure for comparing symptom levels across different populations, facilitating the investigation of risk factors and intervention strategies.
- The DASS-167 is a well-established, widely used tool with good psychometric properties.
- It provides a quick and straightforward method for assessing symptoms of depression, anxiety, and stress.
- The reliance on self-report may introduce biases.
- Some critics argue that the factor structure and the distinction between the three subscales could be further refined.
The DASS-167 is a valuable tool in the assessment of psychological distress, offering a straightforward and efficient means of measuring depression, anxiety, and stress. Its widespread use in both clinical practice and research underscores its utility, although it is essential to consider its limitations and to use it as part of a comprehensive assessment battery.