Study finds bad driving may have genetic basis . Those with certain genetic variants performed worse on the test that those without it . In a study published recently in the journal Cerebral Cortex , researcher Steven Cramer found that people with a certain gene variant performed more than 30 percent worse on a driving test than people without it . Nearly 80 percent of Americans have variant , according to study .
Study finds bad driving may have genetic basis . Those with certain genetic variants performed worse on the test that those without it . Nearly 80 percent of Americans have variant , according to study .