You are teasing your 53-year-old father that he is slower than you are in responding to a visual stimulus. he rightfully argues that

The difference is generally only found in laboratory settings

Explanation: Laboratory settings is the type of the location which is responsible for creating the observation of any learner and understanding it the particular topic in a better way. So,the visual stimulus seen by the child and the father has the difference of the laboratory settings due to which there is difference in the sight between the two people.