DASS (psychology)

DASS (psychology)

DASS, the Depression Anxiety Stress Scales[1], is made up of 42 self report items to be completed over five to ten minutes, each reflecting a negative emotional symptom [2]. Each of these is rated on a four-point Likert scale of frequency or severity of the participants' experiences over the last week with the intention of emphasising states over traits. These scores ranged from 0, meaning that the client believed the item "did not apply to them at all", to 3 meaning that the client considered the item to "apply to them very much, or most of the time". It is also stressed in the instructions that there are no right or wrong answers.

The sum of the relevant 14 items for each scale constitute the participants' scores for each of Depression, Anxiety and Stress[2], including items such as "I couldn't seem to experience any positive feeling at all", "I was aware of the dryness of my mouth" and "I found it hard to wind down" in the respective order of the scales. The order of the 42 items has been randomised so that items of the same scale are not clustered together. Each of the scales is then broken down into subscales comprising two to five items each. Depression has subscales assessing dysphoria, hopelessness, devaluation of life, self-deprecation, lack of interest/involvement, anhedonia and inertia. The Anxiety scale assesses autonomic arousal, skeletal muscle effects, situational anxiety and subjective experience of anxious affect. The stress scale's subscales highlight levels of non-chronic arousal through difficulty relaxing, nervous arousal and being easily upset/agitated, irritable/over-reactive and impatient[1].

The main purpose of the DASS is to isolate and identify aspects of emotional disturbance; for example, to assess the degree of severity of the core symptoms of depression, anxiety or stress. The initial aims of the scale's constructions were to define the full range of core symptoms of depression and anxiety, meet rigorous standards of psychometric adequacy, and develop maximum discrimination between the depression anxiety scales. While the DASS can be administered and scored by individuals without psychology qualifications, it is recommended that the interpretation and decisions based on results are made by an experienced clinician in combination with other forms of assessment.[1]

The Depression, Anxiety, and Stress Scales were developed by researchers at the University of New South Wales (Australia) [3].

The test was developed using a sample of responses from the comparison of 504 sets of results from a trial by students, taken from a larger sample of 950 first year university student responses[1]. The test was then normed on a sample of 1044 males and 1870 females aged between 17 and 69 years, across participants of varying backgrounds, including university students, nurses in training and blue and white collared employees of a major airline, bank, railway workshop and naval dockyard. The scores were subsequently checked for validity against outpatient groups including patients suffering from anxiety and depressive disorders, insomniacs, myocardial infarction patients, as well as patients undergoing treatment for sexual, menopausal and depressive disorders. While the test was not normed against samples younger than 17, due to the simplicity of language, there has been no compelling evidence against the use of the scales for comparison against children as young as 12.[1] The reliability scores of the scales in terms of Cronbach's alpha scores rate the Depression scale at 0.91, the Anxiety scale at 0.84 and the Stress scale at 0.90 in the normative sample. The means and standard deviations for each scale are 6.34 and 6.97 for depression, 4.7 and 4.91 for anxiety and 10.11 and 7.91 for stress, respectively. The mean scores in the normative sample did vary slightly between genders as well as varying by age, though the threshold scores for classifications do not change by these variations[1]. The Depression and Stress scales meet the standard threshold requirement of 0.9 for research, however, the Anxiety scale still meets the 0.7 threshold for clinical applications, and is still close to the 0.9 required for research.


  1. ^ a b c d e f Lovibond, S.H.; Lovibond, P.F. (1995). Manual for the Depression Anxiety Stress Scales (2nd ed.). Sydney: Psychology Foundation  (Available from The Psychology Foundation, Room 1005 Mathews Building, University of New South Wales, NSW 2052, Australia)
  2. ^ a b Lovibond, P.F.; Lovibond, S.H. (March 1995). "The structure of negative emotional states: Comparison of the Depression Anxiety Stress Scales (DASS) with the Beck Depression and Anxiety Inventories". Behaviour Research and Therapy 33 (3): 335–343. doi:10.1016/0005-7967(94)00075-U. PMID 7726811. 
  3. ^ University of New South Wales Depression Anxiety Stress Scales http://www2.psy.unsw.edu.au/groups/dass/

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