The Essential Properties of Yoga Questionnaire (EPYQ): Psychometric Properties

Area of Science:

• Integrative and Complementary Medicine
• Psychology
• Rehabilitation Medicine

Background:

• Yoga interventions are diverse, making it difficult to compare studies or understand specific health impacts.
• Lack of standardized descriptions hinders research on yoga's effects on mental and physical health.
• Understanding which yoga components influence outcomes is crucial for optimizing therapeutic applications.

Purpose of the Study:

• To introduce the Essential Properties of Yoga Questionnaire (EPYQ) as a tool for objectively characterizing yoga interventions.
• To present reliability and validity data for the EPYQ.
• To enable researchers to better link specific yoga dimensions with health outcomes.

Main Methods:

• Development and validation of the Essential Properties of Yoga Questionnaire (EPYQ).
• Reliability assessment using internal consistency and test-retest analyses.
• Identification of fourteen key dimensions of yoga interventions.

Main Results:

• The EPYQ reliably and validly measures fourteen dimensions of yoga interventions: acceptance/compassion, bandhas, body awareness, breathwork, instructor mention of health benefits, individual attention, meditation and mindfulness, mental and emotional awareness, physicality, active postures, restorative postures, social aspects, spirituality, and yoga philosophy.
• The EPYQ demonstrated good reliability and validity.
• Trained raters are currently recommended for scoring to minimize bias.

Conclusions:

• The EPYQ is a validated and reliable measure ready for use by researchers and clinicians.
• This tool will facilitate comparisons across studies and optimize yoga interventions for specific conditions.
• Future work may explore alternative scoring approaches beyond trained raters.