Social Interaction Anxiety Scale
Also known as: SIAS
The Social Interaction Anxiety Scale (SIAS) is a 20-item self-report questionnaire designed to measure anxiety and distress experienced during social interactions and conversations with others. Developed by Mattick and Clarke in 1998, the SIAS is a brief, user-friendly instrument for assessing social interaction anxiety in clinical, research, and community settings, particularly valued for its focus on direct interpersonal contact rather than public speaking or performance situations.
Key highlights
- Interaction-specific measurement — focuses specifically on anxiety during social interactions and conversations, distinct from performance anxiety or public speaking anxiety.
- Self-report efficiency — brief (20 items), self-administered format allows rapid administration in clinical and research settings without clinician time.
- Good psychometric properties — internal consistency (Cronbach's α ≥ 0.88), good test-retest reliability (r ≥ 0.75), strong convergent validity with other social anxiety measures.
- Public domain and free — not copyrighted; freely available for clinical and research use without licensing.
Intuition
This section is available to Pro members. Upgrade to Pro
How it works
This section is available to Pro members. Upgrade to Pro
When to use it
The SIAS is recommended for screening and assessment of social interaction anxiety in clinical and research settings, particularly when the focus is on anxiety during direct interpersonal contact. It is suitable for adolescents (aged 13 and older) and adults. The SIAS is useful in cognitive-behavioral therapy for social anxiety, where specific measurement of interaction anxiety (as opposed to performance anxiety) is relevant. It is less appropriate for assessing performance-focused anxiety (e.g., public speaking).
Strengths & limitations
- Interaction-specific measurement — focuses specifically on anxiety during social interactions and conversations, distinct from performance anxiety or public speaking anxiety.
- Self-report efficiency — brief (20 items), self-administered format allows rapid administration in clinical and research settings without clinician time.
- Good psychometric properties — internal consistency (Cronbach's α ≥ 0.88), good test-retest reliability (r ≥ 0.75), strong convergent validity with other social anxiety measures.
- Public domain and free — not copyrighted; freely available for clinical and research use without licensing.
- Self-report format — subject to response bias (social desirability, lack of insight); clinician observation unavailable.
- Interaction-focused scope — does not assess performance-focused anxiety (public speaking, performance); complementary measure (Social Phobia Scale) may be needed for comprehensive assessment.
- Cultural variation — cutoff scores may vary by culture; population-specific norms recommended for non-Western samples.
Common pitfalls
This section is available to Pro members. Upgrade to Pro
Applications
This section is available to Pro members. Upgrade to Pro
Frequently asked
What cutoff score indicates clinically significant social interaction anxiety on the SIAS?
A cutoff of approximately 34 identifies elevated anxiety in community samples. Scores above 40 typically suggest clinical concern warranting further evaluation. However, cutoff values vary by population; consult population-specific research for your demographic.
How do SIAS and Social Phobia Scale (SPS) differ?
The SIAS measures anxiety during social interactions and conversations (20 items). The SPS measures anxiety related to being observed, embarrassment, and performance scrutiny (20 items). Together, they provide comprehensive social anxiety assessment. Use SIAS for interaction anxiety; use SPS for performance/observation anxiety.
Is the SIAS suitable for diagnosing social anxiety disorder?
No. The SIAS measures social interaction anxiety severity but is not diagnostic. Diagnosis requires clinical interview assessing DSM-5 criteria (marked fear in social situations, avoidance or distress, persistence 6+ months, functional impairment). Use SIAS as a screening and monitoring tool, not for diagnosis.
Can I use the SIAS in adolescents?
Yes. The SIAS is validated for adolescents aged 13 and older. However, age-specific norms and cutoffs may differ from adult samples; consult research on adolescent social anxiety for appropriate interpretation.
Sources
- 1.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.
You have read it. What now?
Cite this page
ScholarGate. (2026, June 3). Social Interaction Anxiety Scale. ScholarGate. https://scholargate.app/clinical-psychology/social-interaction-anxiety-scale