Development and Validation of the Outcome Expectations for Yoga Scale

Area of Science:

• Health Psychology
• Mind-Body Interventions
• Psychometrics

Background:

• Yoga is increasingly recognized for its multifaceted health benefits.
• Understanding individuals' expectations of yoga is crucial for promoting adherence and maximizing therapeutic outcomes.
• Existing instruments may not comprehensively capture the range of expected benefits from yoga practice.

Purpose of the Study:

• To develop and validate a reliable instrument for measuring outcome expectations related to yoga practice.
• To assess the internal consistency and construct validity of the newly developed scale.
• To explore demographic differences in yoga outcome expectations.

Main Methods:

• A 20-item scale was developed to assess perceived physical, mental, and spiritual health benefits of yoga.
• The scale was administered to adults (N = 185) participating in a yoga clinical trial.
• Principal component analysis and Cronbach's alpha were used for psychometric evaluation.

Main Results:

• The final 20-item scale demonstrated high internal consistency (Cronbach's alpha = .96) and strong item loadings (.57–.88).
• Principal component analysis supported the scale's internal structure.
• Significant differences in outcome expectation scores were observed based on sex.

Conclusions:

• The newly developed scale is a psychometrically sound instrument for assessing outcome expectations of yoga.
• This scale can aid in tailoring interventions to enhance patient adherence and engagement in yoga.
• Findings highlight the importance of considering demographic factors, such as sex, in understanding yoga outcome expectations.