“Bringing Pavlovian conditioning into the mix, rats had to wait 15 minutes after a Lego block was placed in their cage before they received a Froot Loop.”
The first rat car was a plastic cereal container, and the rats learned to steer it toward a Froot Loop. Then they started revving the lever before the car was even on the track. Rats made to wait for rewards scored as more optimistic and bolder at problem solving than rats fed instantly. Rodents get better from delayed gratification. Every app on your phone is engineered to remove it.