Answer:
Groupthink
Step-by-step explanation:
An expert in group process would be concerned about groupthink.
Martin is definitely not an expert in group process because if he was, he wouldn't have cut everyone else in the group off despite the fact that people in the group are smart and capable.
Groupthink theory was first developed by a social psychologist with the name Irving Janis in his study which was carried out in the year 1972
Groupthink simply means a psychological phenomenal in which members of a group strive to reach a general agreement within the group. This can be further explain as a situation where individual beliefs is suppressed and the general opinion of the group is unanimously adopted.