Two Transportation Security Administration officers are scanning bags at the airport. One of the officers lets a bag go through, but the other officer yells, "Wait, didn't you see that?" Why one officer saw a weapon and the other did not is BEST explained by:

Example of Signal detection theory.

Explanation:

Signal detection theory is a way to measure the ability of a person to recognise random and information bearing patterns. It is important in psychology because it measures how we make decisions under uncertain conditions. According to this theory our ability to detect signal depends on the psychological state of an individual and intensity of the stimulus.