SCAS Reliability: 

Co-efficient alpha

 

Spence (1998)
N =  2052

Spence, Barrett & Turner (2003)
N = 875

Muris  (2000)
N = 1011

Muris (2002)
N = 521

Panic/agoraphobia

0.82

0.80

0.81

0.83

Social phobia

0.70

0.72

0.73

0.75

Separation anxiety

0.70

0.71

0.74

0.62

Generalised anxiety

0.73

0.77

0.77

0.81

Obsessions/compulsions

0.73

0.75

0.75

0.76

Fear of physical injury

0.60

0.60

0.57

0.54

Total score

0.92

0.92

0.92

0.9

 

Test-retest reliability

 

Spence (1998)
N= 344
6 months

Spence, Barrett & Turner (2003)
N = 362
12 weeks

Panic/agoraphobia

0.45

0.51

Social phobia

0.57

0.75

Separation anxiety

0.57

0.52

Generalised anxiety

0.56

0.66

Obsessions/
compulsions

0.53

0.69

Fear of physical injury

0.54

0.59

Total score

0.60

0.63

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