Adjusting for psychological traits explains why a gender difference exists within risk aversion and why these differences are not a part of ambiguity aversion.
Language, higher order cognition, refined emotions, civility and morality are uniquely human characteristics, that is, traits humans have that non-human animals do not.
Junior's most prominent character traits are his laziness, obesity, and low social intelligence (although there are occasional references to him being academically bright).
Basal traits consist of a large skull, a short thighbone, the possession of just two sacral vertebrae and the presence of fifteen teeth in the pterygoid.
