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Table 2 Scale reliabilities of the DASS-21 and STAI

From: Herbal medicine use behaviour in Australian adults who experience anxiety: a descriptive study

  Current study General population normsa Clinical population
Scale M SD α M SD α M SD α
DASS-21 Stress 8.07 5.28 .91 3.99 4.24 .89 21.10b 11.15b .93b
DASS-21 Depression 6.98 5.87 .94 2.57 3.86 .90 10.65b 9.30b .96b
DASS Anxiety 5.82 5.14 .90 1.74 2.78 .79 10.90b 8.12b .89b
STAI Trait 46.63 12.39 .94 36.35 11.39 .94 55c 10c _d
STAI State 43.65 12.87 .94 33.16 11.69 .94 52c 13c _ d
  1. Note. α Cronbach alpha, DASS Depression Anxiety Stress Scale, STAI State Trait Anxiety Inventory
  2. a Australian general population norms taken from [19]
  3. b Clinical population norms (anxiety or mood disorder diagnosis) for the DASS-21 taken from [21]
  4. c Clinical population norms (GAD diagnosis) for the STAI State and Trait scales taken from [22]
  5. d Not reported