Tishler, C. L., Apseloff, G., Bartholomae, S., Reiss, N. S., Rhodes, A. R., & Singh, A. (2007). Are normal healthy research volunteers psychologically healthy? A pilot investigation 300. Experimental and Clinical Psychopharmacology, 15(6), 539–545. https://doi.org/10.1037/1064-1297.15.6.539