According to the study by Simon and Martens comparing state anxiety before competitive sports to state anxiety before other childhood evaluative activities, the activity with the highest state anxiety levels was
The activity with the highest state anxiety levels was: band solo.
Explanation:
The study in question is a classic sport psychology article written by Simon and Martens in 1979. It develops an important topic about sports and youth participation focuses on anxiety and its effects. They demonstrated that band solos and other music activities have higher anxiety-producing levels than other sports activities, due to often being related with negative emotions and evaluation.
