Ethical Principles of Yoga Philosophy in Western Yoga Practitioners: Validation of the Yama/Niyama Questionnaire.

Yoga is mainly known for its postures, while it has a rich philosophical/spiritual background which is often not well known. Particularly the ethical principles of Yoga, the Yamas and Niyamas, are of relevance for Western practitioners also. We thus intended to develop and validate an instrument that operationalizes the Yamas and Niyamas and performed a cross-sectional survey among 901 Yoga practitioners in Germany with standardized instruments. Principal component analysis of the 23-item Yama/Niyama Questionnaire (YaNiQ) pointed to 4 factors with good internal consistencies (Cronbach's α = 0.86, 0.82, 0.85, and 0.63). Best predictors of these factors were conscious presence ("mindfulness") and inner correspondence with Yoga practices. The YaNiQ seems to be suited for Western practitioners and could be a useful measure in future studies which intend to analyze the social and health-related attitudes and behaviors of Yoga practitioners. It can be assumed that the ethical principles are important contributors for lifestyle and behavior changes.