| Correlate as named by investigator | People investigated | |
| Finding | Neuroticism | Adult general public, 39 nations, 1972-1998 |
| Finding | Neuroticism | Adult general public, 39 nations, 1972-1998 |
| Finding | Neuroticism (Eysenck) | Adults, general public, 30 countries, 1974-1999 |
| Finding | Neuroticism | Adults, general public, 96 nations, 1990s |
| Finding | Neuroticism | Normal adults, general public, 30 countries, 1977-1997 |
| Finding | Neuroticism trait | Physicians followed 9 years after graduating, Norway, 1993-2002 |