You are intrigued by the different performances shown by high-school swim team members when they are practicing alone,when swimming with others,and when watched by their coach.Draw on studies of social facilitation to offer predictions of when swimmers will turn in their best and worst times.

Based on studies of social facilitation, we can make predictions about when high-school swim team members will turn in their best and worst times. When practicing alone, swimmers may experience decreased motivation and performance due to the lack of competition and social pressure. This is known as the "audience effect" where the presence of others can enhance performance. Therefore, swimmers may not perform at their best when practicing alone.

When swimming with others, the presence of their teammates may lead to an increase in motivation and performance. This is known as the "co-action effect" where the presence of others can improve performance. Therefore, swimmers may turn in their best times when swimming with their teammates.

When watched by their coach, swimmers may experience increased pressure and anxiety, which can negatively impact their performance. This is known as the "evaluation apprehension effect" where the presence of an authority figure can hinder performance. Therefore, swimmers may turn in their worst times when being watched by their coach.

In summary, based on the principles of social facilitation, swimmers are likely to perform their best when swimming with their teammates and their worst when being watched by their coach. Practicing alone may also lead to suboptimal performance compared to swimming with others.