Final answer:
Rewarding group members equally is not an effective way to prevent social loafing, while identifying individual contributions, reminding of unique inputs, and keeping groups small are effective methods.
Step-by-step explanation:
The ineffective method to reduce social loafing is rewarding group members for the work that they accomplish together. This can potentially reinforce social loafing by providing equal rewards to all members without considering individual effort and may not encourage individuals to contribute fully.
An explanation of effective methods to reduce social loafing includes making each individual's contributions identifiable, which creates accountability. Reminding individuals of their unique contributions encourages ownership of the work. Keeping groups small is beneficial as peer pressure is stronger, individual effort is more visible, and there is less chance for individuals to hide or 'free ride' within the group. Lastly, increasing the complexity and difficulty of tasks can motivate members to participate, as they feel their contributions are necessary for the group's success.