46% of the trait of procrastination is due to genetic influences, according to a study of hundreds of sets of twins. The research also lends support to a theory that procrastination, in its tendency to undermine adherence to long-term goals, is a byproduct of impulsivity, which may have had an evolutionary origin: Hunter-gatherers had an advantage if they acted swiftly to satisfy their survival needs. Your genetics don’t necessarily condemn you to a life of procrastination: The 46% figure means procrastination is only “moderately heritable,” according to the researchers, led by Daniel E. Gustavson of the University of Colorado.
If adults assume that their ability to discern trustworthiness, or the lack thereof, in strangers’ faces is a skill honed over a lifetime, they’re wrong. Children ages 5 and 6 made very nearly the same judgments about the trustworthiness of computer-generated faces as adults, and children ages 3 to 4 were off by just a few percentage points, says a team led by Emily J. Cogsdill of Harvard. People make inferences—right or wrong—about strangers’ characters within 50 milliseconds of viewing their faces, prior research has shown.
SOURCE: Inferring Character from Faces: A Developmental Study