Standing in the checkout line at the grocery store, jerry kept looking at his watch to see the time. as a result, he failed to see that a store employee was being robbed by a person just in front of him. jerry most clearly suffered from

inattentional blindness

Explanation:

This refers to how we tend to zoom out of everything around us and zoom in to what seems important to us at that particular moment trusting that our schemas will assist us with other things.

Since our cognitive and processing ability is limited it gives us sufficient time to focus our utmost attention to what matters more at that time.

Sometimes this happen because we don't expect certain things to happen in certain situation like standing in a checkout you are not really expecting that someone may be robbing a person just in day light.

answer; use multiple stimuli;