Privileged Pigs Are More Optimistic

If you're anything like pigs, your outlook on life may depend on your personality and mood, according to a new study. Previous research revealed that humans' "cognitive biases" — deviations in judgment that form people's individual characteristics and personalities — are affected by mood and behavior. In a new study, scientists demonstrated for the first time that a combination of mood and personality can have a significant impact on a pig's outlook.