Theorists

Lewis Goldberg – 1932 Present

A comprehensive academic analysis of Lewis R. Goldberg's life, the lexical hypothesis, the Big Five...

November 7, 2026 • Dr. Mohammed Looti
Scales

Brief Betrayal Trauma Survey (BBTS)

A comprehensive psychometric guide to the Brief Betrayal Trauma Survey (BBTS) developed by Lewis R....

October 1, 2026 • Dr. Mohammed Looti
Scales

International Personality Item Pool (IPIP)

A comprehensive academic analysis of the International Personality Item Pool (IPIP) 50-item Big-Five Factor Markers,...

September 26, 2026 • Dr. Mohammed Looti