This study examined the relationship between the “bright” and “dark” side of work personality, as well as their relationship to cognitive ability. In all 374 working adults completed three tests at work: Hogan Development Survey (HDS) (Hogan & Hogan, 2009); Saville Consulting Wave Professional Styles (Saville Consulting, 2005); Raven’s Progressive Matrices (Raven, Raven, & Court, 1998). The fou...

Over 300 British adults completed the Hogan Development Survey (HDS) (Hogan & Hogan, 2001), a measure of the personality disorders and the Bar-On Emotional Quotient Inventory (EQi) (BarOn, 2004). Work associates known to the participants also completed an observers’ version of the EQi. The structures of both inventories were examined. The HDS factored into three clear factors (clusters A, B, C)...

Richardson & Hogan (1946) produced hydrocephalus in rats by feeding a purified casein diet containing all the vitamins available at that time. Almost 2 % of the young from females fed the experimental diet were hydrocephalic; female rats fed the same diet supplemented with liver extract gave birth to normal young. It is now thought that this diet was marginally deficient in vitamin B12 (Newbern...