Additive tasks refer to tasks for which the group’s performance is equal to the sum of the performances of each individual group member; activities where the group output reflects the total of all individual members’ contributions.

In the psychology context, additive tasks refer to tasks where the individual contributions of each group member add up to create the final outcome. The outcome of additive tasks is typically more predictable and less dependent on group coordination than multiplicative tasks.

Examples of additive tasks include assembling a puzzle, performing a tug-of-war, and cleaning up a room. In each of these examples, the contributions of each individual can be combined to achieve the desired outcome. In contrast, tasks such as brainstorming or group decision-making are examples of multiplicative tasks, where the effectiveness of the group's output depends on the quality of coordination between group members.

It's worth noting that the distinction between additive and multiplicative tasks is not always clear-cut, as some tasks may involve elements of both. Additionally, the effectiveness of group performance on any given task can be influenced by a variety of factors, such as group composition, communication, and motivation.

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