The General Factor of Personality: A reply to Muncer

In previous studies we have shown that a General Factor of Personality (GFP) occupies the apex of the hierarchy of personality as well as the apex of the personality disorders in the same way that g, the general factor of mental ability, occupies the apex in the organization of cognitive abilities ( Rushton & Irwing, 2011). In a critique, Muncer (2011) re-analyzed one of our data sets and concluded there was no evidence for a GFP. He also argued against the evolutionary theory we had proposed for the origin of the GFP. In this rejoinder I rebut Muncer’s conclusion and describe how directional selection can explain the GFP.

► Responds to a critique of the General Factor of Personality (GFP) by Muncer (2011).
► Rebuts Muncer’s analyses as inappropriately piecemeal.
► Reviews twin data and explains how “directional selection” accounts for origin of GFP.