Humor as a Mental Fitness Indicator:

Humor as a Mental Fitness Indicator

Daniel P. Howrigan & Kevin B. MacDonald
http://www.epjournal.net/wp-content/uploads/ep06652666.pdf

General Intelligence:

General Intelligence (a.k.a. IQ, general cognitive ability, the g factor) is a way of quantifying intelligence's variability among people. It is the best-established, most predictive, most heritable mental trait ever discovered in psychology.

Geoffrey Miller, Spent

Gen-Kultur Koevolution & Evolutionäre Psychologie:

http://evoandproud.blogspot.co.at/2011/08/was-evolutionary-psychology-inevitable.html