What type of tasks are characterized by independent contributions being summed to form a final product?

The correct choice is additive tasks, characterized by a scenario where the contributions of individual members or components are aggregated to produce a final outcome. In an additive task, each person's efforts contribute directly to the end result, such as in an exercise where multiple team members perform parallel work that combines to achieve a single objective. For example, if a group is working on a research project and each member completes a section that is simply added together for the final report, this exemplifies an additive task.

In contrast, conjunctive tasks require all members to complete their part successfully for the group to succeed, meaning the success hinges on the weakest link rather than the sum of contributions. Disjunctive tasks rely on the performance of the best member of the group to determine the outcome, putting emphasis on the highest individual achievement rather than the overall group effort. Collaborative tasks often imply a more integrated approach where members work closely, sharing responsibilities and interdependencies, rather than simply accumulating individual contributions like in additive tasks.