The researchers determined the results of the experiment with the help of a state-of-the-art eye tracker which recorded the babies’gaze upon the items. Interestingly enough, results showed that the infants—boys and girls alike—held a longer gaze when the dolls were placed in front of them, as opposed to the cars.
One of the topics focused on was the male infants’preference for boy dolls over mechanical toys, which defied sex-related preference for toys. Admittedly, further research needs to be done to determine what causes the gender switch in older children, specifically those older than five months up to three years of age. Other scientific studies suggest that physiological changes (hormones) play a big role in the switch of preference not only for toys but also for other objects.