I. Scale Introduction

Generalized Anxiety Disorder 7-item (GAD-7) scale free online test. The scale is a brief self-report anxiety symptom questionnaire developed by Spitzer et al. in 2006. Due to its ease of use, it is widely applied for screening for Generalized Anxiety Disorder (GAD) and assessing its severity.

The GAD-7 comprises seven items, which respondents rate based on their experiences over the past two weeks on a scale ranging from 0 (not at all) to 3 (nearly every day). The total score ranges from 0 to 21 points, with higher scores indicating more severe anxiety symptoms. This ease of administration and interpretation makes the GAD-7 a practical tool for healthcare providers to quickly assess anxiety levels and monitor changes over time.

II. Development Background and Purpose

Before the advent of the GAD-7, assessing anxiety typically required time-consuming professional clinical interviews. The emergence of the GAD-7 provides clinicians and individuals with a rapid, effective initial assessment tool, helping to promptly identify those who may need further professional help.

• Fast and Efficient: The self-assessment of 7 questions can be completed in just about 1 minute.
• Scientifically Reliable: Through rigorous empirical research and psychometric analysis, its results are highly consistent with professional psychiatric interviews (the diagnostic gold standard).
• Widely Applicable: Adopted not only in clinical settings but also suitable for personal self-awareness and daily mood monitoring.

III. Scale Reliability

The development of the GAD-7 was based on a large-scale study (N=2740) conducted in 15 primary care clinics across the United States. By comparing it with independent diagnoses made by mental health professionals (the gold standard), the study determined that at a cut-off score of 10, the GAD-7 achieves a sensitivity of 89% and a specificity of 82%, demonstrating excellent screening performance.

IV. Applicable Scenarios

Thanks to its excellent psychometric properties, the GAD-7 has been widely used in primary care, psychiatric clinics, and various research settings.

1. Primary Care Settings: Rapidly screening for anxiety tendencies to assist primary care physicians in preliminary judgment.
2. Mental Health Surveys: Used in schools and companies for group psychological state assessment.
3. Personal Self-Assessment: Can be used as a reference tool when concerned about one's own emotional issues.

V. Score Interpretation

The total score ranges from 0 to 21, with 5-point intervals as cut-offs; higher scores indicate more severe anxiety symptoms.

Reference source: Introduction to the Chinese version of this scale and test link address https://toolonline.net/GAD-7