Now, the experts at Individual Differences Research (IDR) labs have devised a three-minute “Toxic Personality Test” — to help you see if you’re overdoing it on optimism. This litmus test ...

IDR has been successfully applied to a small cohort of adult ... the rate climbs to at least 50%. Our lab has partnered with the Purdue Saliva, Perception, Ingestion, and Tongues (SPIT) Lab to ...