A brief measure of life satisfaction: psychometric properties and measurement invariance of the Polish three-item Satisfaction with Life Scale (SWLS-3)
The Satisfaction with Life Scale-3 (SWLS-3) is a brief three-item version of the five-item Satisfaction with Life Scale (SWLS), but it has not been validated in Poland. This study examined its psychometric properties, structural validity, measurement invariance across sex and between the Polish and original UK samp...