Vladimir, a basketball novice, makes about 60 percent of his free throws when practicing alone. however, when playing with his friends, he only makes about 30 percent of his free throws. this decrease is most likely the result of:

The answer is social facilitation.

Explanation:

This concept states that people tend to performe differently in the presence of others. This might occur either if other people participate on the task, or if they are merely observers.

Some theories remark that an audience might improve or worsen the performance, depending on how familiar the task is. Difficult or unfamiliar tasks tend to be less successful, possible due to stress.

we need the diagram to answer this correctly.