Rats prefer waiting for rewards over instant gratification, challenging current theories.
Rats were tested on two tasks that were similar in reward rate and effort required. Despite this, rats were willing to wait longer on a foraging task than on a task involving delayed rewards. They also made less optimal choices on the foraging task. Existing theories on decision-making did not fully explain the results, suggesting the need for a new model that considers interactions between different decision-making systems. This study shows that rats value time differently depending on the task, challenging current theories on how animals make choices.