This report describes the psychometric properties of the Self-Assessment of Resilience and Anxiety (SARA) scale within the context of a study of kava for generalized anxiety. This eight-item, patient-rated scale includes questions designed to measure calmness, mental clarity, confidence, physical well being, sociability, and resilience. The SARA scale was administered during a clinical trial of kava versus placebo in 38 subjects diagnosed with generalized anxiety disorder (GAD). Validation of the SARA scale was assessed against the Hamilton Rating Scale for Anxiety, Hospital Anxiety and Depression Scale, Penn State Worry Questionnaire, Sheehan Disability Scale, Arizona Sexual Experience scale, and Clinical Global Impression of Illness Improvement scale. Good test-retest reliability, internal consistency, convergent validity, and sensitivity to treatment were identified, and factor analyses revealed a three-factor internal structure. The SARA scale was responsive to symptom change over time and correlated with comparable GAD symptom measures. The SARA scale demonstrates solid psychometric properties and may serve as a reliable and valid measure in the use of kava or related medicinal herbs.