Questions used with permission from Su, R., Tay, L., & Diener, E. (2014). The development and validation of the Comprehensive Inventory of Thriving (CIT) and the Brief Inventory of Thriving (BIT). Applied Psychology: Health and Well‐Being, 6(3), 251-279.

Optimism by Carver, Scheier, & Segerstrom (2010)

Dispositional Optimism and Physical Health: A Long Look Back, A Quick Look Forward by Schreier & Carver (2018)

Bigony, C. (2019). 15Five: Technology aligned to the science of thriving. (Unpublished master's thesis). University of Pennsylvania, Philadelphia, PA, USA.