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

Table 7

Results of comparing the mean pretest score and mean last available score and effect size (Cohen’s 𝑑^′) of the difference according to various measures (𝑁=170).

	Pretest		Last test		𝑇 (169)	Cohen’s 𝑑^′
	M	SD	M	SD
SIAS	43.8	15.2	31.9	15.9	11.44*	1.23
SPS	35.0	15.8	23.0	17.1	9.95*	1.35
LSAS anxiety (𝑛=149)	38.3	12.2	27.9	15.2	9.54*	1.40
LSAS frequency (𝑛=149)	32.7	13.3	22.7	14.9	9.02*	1.31
BSI_interpersonal anxiety	2.09	0.99	1.39	1.10	8.92*	1.26
BSI_total score	1.36	0.68	0.93	0.77	8.58*	1.00

Note: SIAS: total score on the SIAS; SPS: total score on the SPS; LSAS: Liebowitz social anxiety scale; BSI: brief symptom inventory.
 ^∗𝑃<0.001, two-tailed test.