Answer:
The correct answer is: The availability heuristic.
Step-by-step explanation:
The availability heuristic is a cognitive bias and a error in cognition in which a person uses the immediate information he/she has when evaluating an specific situation, topic or decision.
For example, Sophie is deciding how to name her son. She really likes the name Jules. One day she goes out to the dentist and in the dentist office she hears that her dentists son is named Jules. After the dentist she then goes to the pharmacy to buy some medicines and she notices that the clerk is also named Jules!
She then decides that Jules is a very common name and decides to name her son John.
This is an example of the Availability Heuristic.
In this particular case, Shawn's decision is based on the same error.