A shift toward more extreme decisions in a group as a function of discussion is referred to as

A) group polarisation.
B) biased decision making.
C) the bystander effect.
D) diffusion of responsibility.

Group polarization is a phenomenon where group discussion leads to more extreme decision making than the initial average of individual members' positions. This can occur due to a variety of factors, such as social comparison and influence, where individuals are motivated to conform to the group's norm or to differentiate themselves from others.