Murial often tastes free samples of different foods while grocery shopping. She eats many more of these free samples when the grocery store is crowded with shoppers than when there are only a few other shoppers. This best illustrates the impact of

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Social facilitation is the tendency for people to perform better on simple or well-rehearsed tasks when in the presence of others. In this case, the presence of other shoppers in the crowded grocery store is likely increasing Murial's tendency to eat more free samples.

Murial Often Tastes Free Samples of Different Foods While Grocery