Reliabilty and Validity of DASS-21
Critique of the instrument (Dass-21)
Historical aspects of the development of DASS-21
Procedures involved in the generation of scores from the instrument.
published validity data
published reliability data
Potential sources of error that could contaminate the measurements
potential modifications to the instrument for Body image thoughts of teenage girls age 13-17 and impacts of social media on anxiety and depression and the
emphasis they place on it
Provide a code of best practice to be followed when using the DASS 21
the population that the instrument can be used with
procedures for generating scores from the instrument
Data collection considerations to enhance the validity and reliabilty
modifications to the instrument for use with different populations
Sample Solution
It is reported that mental disorders, including depression, are among the top 20 leading causes of disability worldwide [World Health Organization (2008) The Global Burden of Disease 2004]. All over the globe, about 400 million people are affected by depression [World Health Organization 2014] and around 10–20% of the world’s children and adolescents suffer from mental disorders [World Health Organization 2014]. These disorders may result in impaired capacity to study and work and even suicide among the sufferers if untreated. Early detection of these conditions is therefore of great importance. One of the commonly-used scales for detection of mental health problems is the Depression, Anxiety and Stress Scale. Since its introduction in 1995, the DASS and its short-form—the DASS-21—have been widely used to assess depression, anxiety and stress among adults. Analyses of data among adults using this measure yield consistent results about its psychometric properties. It has been shown to be reliable and valid with a three-factor structure. The reliability and validity of both the DASS and the DASS-21 have been replicated among clinical as well as non-clinical adult samples.
