The Dutch Social Interaction Anxiety Scale and the Social Phobia Scale: Reliability, Validity, and Clinical Utility

Table 3

Number of items and the reliability of (subscales of) the SIAS and SPS (Cronbach’s alpha, interitemcorrelations and their range). 𝑁=359.

	Number of items	Alpha	𝑅ii	𝑅ii range
SIAS-Total	20	0.91	0.35	−0.01–0.71
SPS-Total	20	0.93	0.38	0.15–0.71
SPS-1	6	0.87	0.53	0.33–0.71
SPS-2	8	0.85	0.43	0.29–0.59
SPS-3	6	0.80	0.40	0.17–0.56

Note: SIAS-Total: total score on the SIAS; SPS-Total: total score on the SPS.
SPS-1: anxiety about being observed; SPS-2: becoming the focus of attention; SPS-3: fear that others will notice anxiety.