Assessing meaning & purpose in life: development and validation of an item bank and short forms for the NIH PROMIS®.
Salsman JM, Schalet BD, Park CL, George L, Steger MF, Hahn EA, Snyder MA, Cella D. Assessing meaning & purpose in life: development and validation of an item bank and short forms for the NIH PROMIS®. Qual Life Res. 2020 Aug; 29(8):2299-2310.