| Correlate as named by investigator | People investigated | |
| Finding | Psychoticism | Adult general public, 39 nations, 1972-1998 |
| Finding | Psychoticism (Eysenck) | Adults, general public, 30 countries, 1974-1999 |
| Finding | Psychotism | Adults, general public, 96 nations, 1990s |
| Finding | Psychoticism | Normal adults, general public, 30 countries, 1977-1997 |