Answer:
group polarization
Explanation:
According to my research on studies conducted by various psychologists, I can say that based on the information provided within the question this episode provides an example of group polarization. This term refers to the tendency for a group to make decisions that are more extreme than the initial inclination of its members. Which explains why their belief became more solidified when they got together as a group.
I hope this answered your question. If you have any more questions feel free to ask away at Brainly.
