What is the difference between the dynamics of Synergy and Groupthink? Synergy is when the group has a strengthened belief in its position, and Groupthink is where the group's results are greater than the sum of its parts. Synergy is where the group's results are greater than the sum of its parts, and Groupthink is where the group begins to make poor decisions due to overall group pressure. Synergy is where the group begins to make poor decisions due to overall group pressure, and Groupthink is where the group's results are greater than the sum of its parts. Synergy is where the group's results are greater than the sum of its parts, and Groupthink is when the group has a strengthened belief in its position