Generalized Anxiety Disorder 7-Item Scale (GAD-7)
The GAD-7 is a self-report instrument that measures the severity of generalized anxiety disorder (GAD) symptoms. It was developed by Spitzer, Kroenke, Williams, and Löwe (2006), in a study funded by an unrestricted educational grant from Pfizer. A 2-item ultra-brief version, the GAD-2, is also available for rapid screening (Kroenke et al., 2007), and the GAD-7 has been independently adapted and validated in other languages, including a Spanish-language version (García-Campayo et al., 2010).
Table of Contents
Items and Structure of the GAD-7
The GAD-7 consists of 7 items, each describing an anxiety symptom experienced over the last 2 weeks (e.g., "Worrying too much about different things"), scored on a 4-point Likert scale: 0 ("Not at all"), 1 ("Several days"), 2 ("More than half the days"), or 3 ("Nearly every day"). Spitzer and colleagues describe the GAD-7 as brief and efficient, noting it can be completed entirely by the patient, though the original paper does not report a formal timed completion metric; a Spanish-adaptation validation study measured average completion time at 2 minutes 30 seconds (García-Campayo et al., 2010).
The 7 items were selected from an initial 13-item pool that reflected DSM-IV diagnostic criteria for GAD and existing anxiety scales, retained for having the highest correlation with the full 13-item total score (r = 0.75-0.85). The first 3 items capture the two core DSM-IV diagnostic criteria for GAD (Spitzer et al., 2006).
This study measures generalized anxiety disorder symptom severity using the GAD-7. Responses are automatically scored into a total score within Labvanced.
Click the card above to see the full item list and study structure on Labvanced. Use Inspect to view it directly, or Import to copy the study into your own account and customize it.
Scoring Summary
The 7 item scores are summed into a single total score ranging from 0 to 21, with higher scores indicating greater anxiety symptom severity. There are no subscales.
For the full scoring procedure and severity interpretation, see the GAD-7 Scoring and Interpretation guide.
Psychometric Properties of the GAD-7
- Reliability: In the original validation sample, the GAD-7 showed excellent internal consistency (Cronbach's α = .92) and good test-retest reliability (intraclass correlation = 0.83) over a 1-week interval (Spitzer et al., 2006).
- Validity: Convergent validity was supported by correlations with the Beck Anxiety Inventory (r = .72) and the anxiety subscale of the Symptom Checklist-90 (r = .74). Factor analysis of the GAD-7 alongside an 8-item depression measure confirmed anxiety and depression as empirically distinct dimensions: anxiety items loaded 0.69-0.81 on one factor, while depression items loaded 0.58-0.75 on a separate factor, together explaining 63% of total variance (Spitzer et al., 2006).
- Normative Information: Severity bands (see the Scoring and Interpretation guide) were derived from the original US primary care validation sample (Spitzer et al., 2006). In a separate large German general population sample (N = 5,030), mean GAD-7 scores were 3.2 (SD = 3.5) for women and 2.7 (SD = 3.2) for men, with approximately 5% of the sample scoring 10 or greater and 1% scoring 15 or greater, providing percentile-based population norms (Löwe et al., 2008).
Data Collected with the GAD-7
The GAD-7 captures item-level responses, a computed total score, a severity category, and timing data within Labvanced. All variables can be viewed and customized within the study's Variables Tab.
| Variable Name | Description |
|---|---|
q1_value – q7_value | Participant's raw response (0-3) to each of the 7 individual items |
total | Sum of all 7 item scores (range 0-21) |
severity | Computed severity category based on the total score: None-Minimal, Mild, Moderate, or Severe |
Time Spent on Questionnaire | Time taken to complete the questionnaire, in milliseconds |
Time Submitted | Timestamp of questionnaire submission |
Technologies Supporting the GAD-7
Beyond core self-report data, Labvanced allows additional data streams like mouse tracking, webcam-based eye tracking, or audio and video recording to be layered onto a questionnaire study for more in-depth analysis. The card below covers the different ways researchers can incorporate these technologies into questionnaire research.
Administration Options for the GAD-7
There are several ways this instrument can be configured in Labvanced.
Standard Questionnaire Setup
As a fixed-item Likert scale with no images, drag-and-drop, or slider inputs, the GAD-7 is built using a standard Page Frame, where items are listed top to bottom. See the Questionnaires implementation guide for how Page Frames, question objects, and scoring are set up in Labvanced.
Repeated Administration
The GAD-7 is frequently administered at multiple timepoints to track anxiety symptom change over the course of a psychological intervention or longitudinal study. Labvanced supports repeated, scheduled administration with automated participant reminders.
Multi-Language Deployment
The GAD-7 has been independently translated and validated in numerous languages. Labvanced supports multi-lingual study deployment, allowing a translated version to be configured for the target population.
If there is something else you'd like to know, please feel welcome to write to us and ask:
Recommended Use and Applications of the GAD-7
The GAD-7 is used across clinical, research, and organizational settings to screen for and quantify generalized anxiety symptom severity.
- Mental health screening: Used in primary care and general population settings as a brief screening measure for probable generalized anxiety disorder, ahead of a full diagnostic evaluation (Spitzer et al., 2006; Löwe et al., 2008).
- Treatment-outcome and longitudinal monitoring: Administered repeatedly to track anxiety symptom change over the course of a psychological intervention, with a minimal clinically important difference of 4 points on the total score (Toussaint et al., 2020).
- Occupational and student wellbeing research: Used in university and athletic-department studies examining anxiety, functional impairment, and mental health in non-clinical populations (Tran, 2020).
- General psychiatric and clinical research: Used to assess anxiety severity across heterogeneous psychiatric samples, alongside other measures of psychological distress (Johnson et al., 2019).
For further examples across additional populations, see how the GAD-7 has been used in research.
Explore Related Cognitive Tasks
References
- Bar-Haim, Y., Lamy, D., Pergamin, L., Bakermans-Kranenburg, M. J., & van IJzendoorn, M. H. (2007). Threat-related attentional bias in anxious and nonanxious individuals: A meta-analytic study. Psychological Bulletin, 133(1), 1-24.
- García-Campayo, J., Zamorano, E., Ruiz, M. A., Pardo, A., Pérez-Páramo, M., López-Gómez, V., Freire, O., & Rejas, J. (2010). Cultural adaptation into Spanish of the generalized anxiety disorder-7 (GAD-7) scale as a screening tool. Health and Quality of Life Outcomes, 8, 8. https://doi.org/10.1186/1477-7525-8-8
- Johnson, S. U., Ulvenes, P. G., Øktedalen, T., & Hoffart, A. (2019). Psychometric properties of the General Anxiety Disorder 7-Item (GAD-7) Scale in a heterogeneous psychiatric sample. Frontiers in Psychology, 10, 1713. https://doi.org/10.3389/fpsyg.2019.01713
- Kroenke, K., Spitzer, R. L., Williams, J. B. W., Monahan, P. O., & Löwe, B. (2007). Anxiety disorders in primary care: Prevalence, impairment, comorbidity, and detection. Annals of Internal Medicine, 146(5), 317-325.
- Löwe, B., Decker, O., Müller, S., Brähler, 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.
- Spitzer, R. L., Kroenke, K., Williams, J. B. W., & Löwe, B. (2006). A brief measure for assessing generalized anxiety disorder: The GAD-7. Archives of Internal Medicine, 166(10), 1092-1097.
- Toussaint, A., Hüsing, P., Gumz, A., Wingenfeld, K., Härter, M., Schramm, E., & Löwe, B. (2020). Sensitivity to change and minimal clinically important difference of the 7-item Generalized Anxiety Disorder Questionnaire (GAD-7). Journal of Affective Disorders, 265, 395-401.
- Tran, A. G. T. T. (2020). Using the GAD-7 and GAD-2 generalized anxiety disorder screeners with student-athletes: Empirical and clinical perspectives. The Sport Psychologist, 34(4), 300-309.