Big Five personality (IPIP 50-item)
Fifty public-domain statements from the International Personality Item Pool measuring the Big Five personality factors (Goldberg, 1992).
Source. Goldberg, L. R. (1992). The development of markers for the Big-Five factor structure. Psychological Assessment, 4(1), 26-42.
Licence. International Personality Item Pool: public domain. Permission is automatically granted for any use, commercial or non-commercial.