Depression Anxiety and Stress Scale (DASS)
FREE for use with an Inquisit Lab or Inquisit Web license.Available Test Forms
Depression Anxiety and Stress Scale (long) - English
The long form of the Depression Anxiety and Stress Scale (42 items).
Depression Anxiety and Stress Scale (short) - English
The short form of the Depression Anxiety and Stress Scale (21 items).
References

Lovibond, S.H. & Lovibond, P.F. (1995). Manual for the Depression Anxiety Stress Scales. (2nd. Ed.) Sydney: Psychology Foundation. ISBN 7334-1423-0.
Antony, M.M., Bieling, P.J., Cox, B.J., Enns, M.W. & Swinson, R.P. (1998). Psychometric properties of the 42-item and 21-item versions of the Depression Anxiety Stress Scales (DASS) in clinical groups and a community sample. Psychological Assessment, 10, 176-181.
Crawford, J.R. & Henry, J.D. (2003). The Depression Anxiety Stress Scales (DASS): Normative data and latent structure in a large non-clinical sample. British Journal of Clinical Psychology, 42, 111-131.
Szabó, M., & Lovibond, P.F. (2006). Anxiety, depression and tension/stress in children. Journal of Psychopathology and Behavioral Assessment, 28 3, 195-205.
Page, A.C. Hooke, G.R.; & Morrison, D.L. (2007). Psychometric properties of the Depression Anxiety Stress Scales (DASS) in depressed clinical samples. British Journal of Clinical Psychology. 46, 283-297.
Crawford, J.R., Cayley, C., Lovibond, P.F. Wilson, P.H., & Hartley, C. (2011). Percentile norms and accompanying interval estimates from an Australian general adult population sample for self-report mood scales (BAI, BDI, CRSD, CES-D, DASS, DASS-21, STAI-X, STAI-Y, SRDS, and SRAS). Australian Psychologist, 46, 3-14.
Szabó, M. (2011). The emotional experience associated with worrying: Anxiety, depression or stress? Anxiety, Stress, & Coping: An International Journal, 24, 91-105.
Links
DASS web site at University of New South Wales. Materials, manual, translations, publications, FAQs, and general information about the DASS.