The Science Behind Our Anxiety Quiz

The Instrument: GAD-7

Our anxiety quiz is based on the Generalized Anxiety Disorder 7-item scale (GAD-7), developed by Spitzer, Kroenke, Williams, and Lowe in 2006.

What It Measures

The GAD-7 assesses seven core symptoms of anxiety over the past two weeks:

• Feeling nervous, anxious, or on edge
• Not being able to stop or control worrying
• Worrying too much about different things
• Trouble relaxing
• Being so restless it's hard to sit still
• Becoming easily annoyed or irritable
• Feeling afraid as if something awful might happen

Severity Levels

GAD-7 scores are interpreted as follows:

• 0-4: Minimal anxiety
• 5-9: Mild anxiety
• 10-14: Moderate anxiety
• 15-21: Severe anxiety

Validation & Reliability

The GAD-7 is one of the most rigorously validated anxiety measures:

• Sensitivity: 89% at cutoff score of 10
• Specificity: 82% at cutoff score of 10
• Internal Consistency: Cronbach's alpha of .92
• Test-Retest Reliability: Intraclass correlation of .83
• Validation Sample: Over 2,700 primary care patients

The GAD-7 is used in clinical settings worldwide and has been translated into over 30 languages.

Academic Citations

1. Spitzer, R. L., Kroenke, K., Williams, J. B., & Lowe, B. (2006). A brief measure for assessing generalized anxiety disorder: The GAD-7. Archives of Internal Medicine, 166(10), 1092-1097. https://doi.org/10.1001/archinte.166.10.1092
2. Kroenke, K., Spitzer, R. L., Williams, J. B., Monahan, P. O., & Lowe, B. (2007). Anxiety disorders in primary care: Prevalence, impairment, comorbidity, and detection. Annals of Internal Medicine, 146(5), 317-325. https://doi.org/10.7326/0003-4819-146-5-200703060-00004
3. Lowe, B., Decker, O., Muller, S., Brahler, E., Schellberg, D., Herzog, W., & Herzberg, P. Y. (2008). Validation and standardization of the Generalized Anxiety Disorder Screener (GAD-7) in the general population. Medical Care, 46(3), 266-274. https://doi.org/10.1097/MLR.0b013e318160d093
4. American Psychiatric Association. (2013). Diagnostic and statistical manual of mental disorders (5th ed.). American Psychiatric Publishing.
5. Craske, M. G., & Stein, M. B. (2016). Anxiety. The Lancet, 388(10063), 3048-3059. https://doi.org/10.1016/S0140-6736(16)30381-6

Limitations

While the GAD-7 is highly validated, it has important limitations:

• Screening Focus: Primarily screens for Generalized Anxiety Disorder, not all anxiety types
• Self-Report Bias: Results depend on honest self-assessment
• Symptom Overlap: Anxiety symptoms can overlap with depression, medical conditions, and substance use
• Point-in-Time: Measures symptoms over past 2 weeks, not lifetime patterns

Clinical diagnosis of anxiety disorders requires comprehensive evaluation by a qualified mental health professional.