Researchers investigating performance differences between light- and d
ark-eyed individuals have indicated that dark-eyed individuals perform
better on reactive activities than light-eyed individuals. College st
udents (61 men, 64 women) performed a forehand rally with different co
lored racquetballs. Eye color, sex, and total hits were recorded for e
ach subject. Men scored significantly better with balls of each color
than did women. Dark-eyed men performed better than other subjects and
performance was better with blue balls than yellow or green balls.