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The Unmind Index is a 26-item, 7-subscale measure of mental health and wellbeing designed for use on the Unmind digital workplace mental health platform. The Unmind Index was developed and validated in the UK but is used internationally. This paper reports further psychometric validation of this measure for use in USA, Australia, and New Zealand.Participants in four countries completed the Unmind Index and a battery of existing measures. In Study 1, we use exploratory factor analysis to select questions for the Unmind Index and identify factor structure. In Study 2, we use confirmatory factor analysis to validate the Unmind Index.Study 1 establishes the factor structure, reliability, convergent and discriminant validity, and measurement invariance by age and gender of the Unmind Index separately for USA and for Australia/New Zealand. Study 2 further demonstrates measurement invariance across these locations as well as the UK, and establishes benchmark scores by location, age, and gender.We conclude that the Unmind Index is valid and reliable as a measure of mental health and wellbeing in these locations. |
