1. either genes or some prenatal factors influence handedness!
"Left Handed?"
"Right Handed?"
                                     
10 % of population
More diverse in speech production
Genetically identical twins don’t share handedness
More common among musicians, baseball players, and artists
Bill Clinton, Ben Franklin, Da Vinci, and Marilyn Monroe are some famous left handers
We more likely to have had birth stress
DO we really die younger than righties?
90 % of population
95% of us process speech in the left hemisphere
We prevail in all cultures
Uniquely human, other primates are more ambidextrous
Stanley Coren found that we tend to stay alive longer!
either genes or some prenatal factors influence handedness!