Social Interaction Anxiety Scale
SIASA 20-item measure of anxiety in social interaction situations — meeting and talking with others — designed as a companion to the Social Phobia Scale.
Ready-to-cite methods sentence
Reliability & validation
Response anchors
Not at all characteristic of me · Slightly characteristic of me · Moderately characteristic of me · Very characteristic of me · Extremely characteristic of me
Known limitations
Covers interaction anxiety specifically, not performance or scrutiny fears (its companion Social Phobia Scale covers those); the reverse-worded items perform poorly and are dropped in some short forms.
Original citation
Mattick, R. P., Clarke, J. C. (1998). Development and validation of measures of social phobia scrutiny fear and social interaction anxiety. Behaviour Research and Therapy, 36(4), 455-470.
https://doi.org/10.1016/S0005-7967(97)10031-6Questions researchers ask
What does the SIAS measure?
A 20-item measure of anxiety in social interaction situations — meeting and talking with others — designed as a companion to the Social Phobia Scale.
How many items does the SIAS have?
The Social Interaction Anxiety Scale (SIAS) has 20 items.
Is the SIAS free to use?
The SIAS is free to use for non-commercial academic research. You don't need to pay a license fee, but you should always cite the original publication.
Is the SIAS reliable?
Validation studies report Cronbach's α of 0.93, test–retest reliability of 0.92. See the reliability section for the population studied and full statistics.
Who developed the SIAS, and how do I cite it?
Mattick, R. P., Clarke, J. C. (1998). Development and validation of measures of social phobia scrutiny fear and social interaction anxiety. Behaviour Research and Therapy, 36(4), 455-470. https://doi.org/10.1016/S0005-7967(97)10031-6
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Related scales
Library entry verified July 2026. Metadata is provided for reference; item wording is available inside Folio Surveyor, subject to each instrument's licensing.