Answer:
Signal detection theory
Step-by-step explanation:
In psychology, signal detection theory is also referred to as detection theory and it is described as a phenomenon to measure of identifying the capability of a person to differentiate between random patterns and information-bearing patterns that tend to distract from a piece of particular information.
In other words, it is described as a state in which the detection of a specific stimulus depends on the psychological or physical state of the person as well as the intensity of the given stimulus.
In reference to the question, Dr Richardson is most likely an advocate the signal detection theory.