STAI Scoring & Interpretation · State-Trait Anxiety Inventory
Two 20-item anxiety scales: State (STAI-S) and Trait (STAI-T). Scores 20–80 per subscale; ≥40 clinical concern. Copyrighted by Pearson. Spielberger et al. (1983). Score interpreter and free alternatives guide.
STAI Score Interpreter
At or above the commonly cited threshold; suggest further clinical evaluation.
Each subscale has 20 items rated 1–4, with multiple items reverse-scored. The same ≥40 threshold applies to both the State (STAI-S) and Trait (STAI-T) subscales. Higher scores indicate greater anxiety.
| STAI-S or STAI-T subscale (20–80) | Interpretation |
|---|---|
| 55+ | High anxietyScore well above the population mean; clinically elevated anxiety warranting assessment. |
| 40–54 | Clinical concernAt or above the commonly cited threshold; suggest further clinical evaluation. |
| 20–39 | Below clinical thresholdScore within the normal population range; anxiety not clinically elevated. |
Spielberger et al. (1970, 1983). The ≥40 clinical concern threshold is a commonly used clinical convention based on normative data from the STAI manual. Educational reference only — not a diagnostic tool.
The STAI is the most widely used research measure of anxiety, consisting of two 20-item scales: State Anxiety (how you feel right now) and Trait Anxiety (how you generally feel). Scores 20–80 per subscale. Developed by Spielberger et al. (1983). Copyrighted by Pearson.
What is the State-Trait Anxiety Inventory?
The State-Trait Anxiety Inventory (STAI) was developed by Charles D. Spielberger, Richard L. Gorsuch, and Robert E. Lushene (1970), with the Form Y revision published in 1983. It is the most widely used measure of anxiety in psychological research, with over 20,000 citations. It distinguishes between two conceptually distinct forms of anxiety: state anxiety (a transient emotional condition) and trait anxiety (a stable personality disposition toward anxiety).
The State Anxiety Scale (STAI-S) asks respondents to rate how they feel right now on 20 items (e.g., "I feel calm," "I feel tense"). The Trait Anxiety Scale (STAI-T) asks how respondents generally feel on 20 items. Both scales are scored 1–4, with multiple items reverse-scored. Each scale yields a score from 20 (minimum anxiety) to 80 (maximum anxiety).
The STAI is copyrighted by Pearson and requires a license to administer. It is available for purchase through Mind Garden. For free validated anxiety screening, the GAD-7, HAM-A, and SPIN are recommended public-domain alternatives. The PSWQ is the preferred scale when worry (the trait aspect of GAD) specifically needs to be measured.
STAI Score Interpreter
Enter STAI-S and STAI-T scores from a licensed assessment to see the corresponding interpretation.
Score range: 20 (calm) to 80 (extreme anxiety)
Score range: 20 (low anxiety disposition) to 80 (high anxiety disposition)
STAI is copyrighted by Pearson. This interpreter is for educational reference only.
STAI Score Ranges
Spielberger et al. (1983). Score of 40+ on either subscale is the commonly cited clinical concern threshold. Population mean ≈ 35–40. The same bands apply to both the State (STAI-S) and Trait (STAI-T) subscales.
| Score range | Interpretation |
|---|---|
| 20–39 | Below clinical threshold |
| 40–54 | Clinical concern |
| 55–80 | High anxiety |
Free Anxiety Screening Alternatives
When STAI licensing isn't available, these free validated tools cover the same clinical territory.
Generalized Anxiety Disorder Scale
7-item anxiety screener, the standard free primary care tool. Best equivalent to STAI-T for clinical screening workflows. Free for clinical use.
Hamilton Anxiety Rating Scale
14-item clinician-rated anxiety scale with psychic and somatic subscales. Criterion standard for anxiety clinical trials. Free for clinical use.
Penn State Worry Questionnaire
16-item measure of pathological worry, the closest free equivalent to the STAI-T for GAD-specific trait anxiety. Free for clinical use.
Anxiety Screening Without the Licensing Headache
HiBoop includes GAD-7, HAM-A, PSWQ, and SPIN, validated free anxiety measures that cover everything STAI does, with automated scoring and longitudinal tracking.
Frequently Asked Questions
What is a high STAI score?
Each STAI subscale (State and Trait) ranges from 20 to 80. A score of 40 or above on either subscale is a commonly used clinical threshold indicating elevated anxiety, based on Spielberger's normative data. Population means for non-clinical adults typically fall between 35 and 40.
Is the STAI self-report or clinician-administered?
The STAI is a self-report questionnaire. Respondents rate each item on a 4-point scale without clinician involvement in the administration itself. It is widely used in research settings and requires a commercial license through Mind Garden (Pearson) to administer.
Can the STAI diagnose an anxiety disorder?
No. The STAI is a dimensional measure of anxiety severity, not a diagnostic instrument. Elevated scores indicate clinically significant anxiety symptoms and may prompt further clinical evaluation, but a diagnosis requires a structured clinical interview conducted by a qualified mental health professional.
What is the difference between state and trait anxiety on the STAI?
State anxiety (STAI-S) reflects a transient emotional reaction to a specific situation — how a person feels right now. Trait anxiety (STAI-T) measures a stable personality disposition — how a person generally feels across time and situations. Both subscales use the same 20–80 scoring range and the same ≥40 clinical concern threshold.
References
- 1.Spielberger CD, Gorsuch RL, Lushene RE. Manual for the State-Trait Anxiety Inventory. Consulting Psychologists Press. 1970.
- 2.Spielberger CD. Manual for the State-Trait Anxiety Inventory (Form Y). Consulting Psychologists Press; 1983.
- 3.Marteau TM, Bekker H. The development of a six-item short-form of the state scale of the Spielberger State-Trait Anxiety Inventory (STAI). Br J Clin Psychol. 1992;31(3):301-6.View source
- 4.Grös DF, Antony MM, Simms LJ, McCabe RE. Psychometric properties of the State-Trait Inventory for Cognitive and Somatic Anxiety (STICSA): comparison to the State-Trait Anxiety Inventory (STAI). Psychol Assess. 2007;19(4):369-81.View source
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The STAI Scoring & Interpretation · State-Trait Anxiety Inventory qualifies for reimbursement under these CPT codes (US).
Last reviewed: Jun 3, 2026
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