47: Free will, Basis of EvoPsych, Positive/Negative Reinforcement

We discuss free will, take a call from a behavioral therapist asking about the scientific validity of evolutionary psychology, and Dr. Lisle explains the flawed thinking of positive & negative reinforcement. 

29: Grudges, Sports, and Rivalry

Evolutionary pscyhology explains grudges, sports competitions, and the rivalries that go with it.