When ants are excavating dirt, they work much faster when there are other ants present than when they are excavating on their own.The improvement in performance that occurs in the presence of other ants is consistent with the concept of:

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Social facilitation is the concept that individuals tend to perform better when in the presence of others, particularly when the task is simple or well-rehearsed. This phenomenon has been observed in many different species, including ants. The presence of other ants seems to stimulate and enhance the excavation process, resulting in faster and more efficient digging. Social interference refers to situations in which the presence of others hinders performance, which is not the case here. A self-serving bias and normative social influence are not applicable to this scenario.

When Ants Are Excavating Dirt, They Work Much Faster When