Answer: Group polarization.
Step-by-step explanation:
Group popularization is a term used in social psychology. It refers to a situation in which members of a particular group develop more extreme attitudes during a discussion. In this case, Nora, Ko, Ian and May initially thought that Ms. Akey is a slightly better teacher than Mr. Schwenke. However, after discussing this issue together, they changed their opinions and concluded that Ms. Akey is much better in teaching than Schwenke.