Research on decision making suggests that, compared with a single person, a group is more likely to generate the correct solution to a problem that

There are several reasons why group problem-solving and decision making is more likely to produce the correct answer than in an individual setting.

One reason is that groups who act in a cooperative manner tend to do better than individuals, who are in a more competitive atmosphere. Group interaction facilitates collaboration, fresh ideas, and improved solutions.

Another reason why groups tend to do better is that a group has a better collective memory than one person does.

Lastly, a group working together can draw upon each other's strengths and talents, making the group more well-rounded and resource rich.

answer; /// i believe the correct answer is (when one group has an extremely high score at pretest;

world bank is the correct answer.