After the chicks learned that the five-dot panel meant food, the researchers removed that panel, and then placed the chicks in front of two panels, one off to the left and the other off to the right, that each had two dots, 'Live Science' reported.
After the chicks learned that the five-dot panel meant food, the researchers removed that panel, and then placed the chicks in front of two panels, one off to the left and the other off to the right, that each had two dots, 'Live Science' reported.