This document discusses anxiety and its effects on performance. It defines anxiety as a negative stress response and lists some common symptoms like increased heart rate and muscle tension. Anxiety can be caused by factors like inexperience, expectations, and peer pressure. There are two main types of anxiety - cognitive involving thoughts/worries and somatic involving physiological responses. Anxiety can be measured as a temporary state or a more long-term personality trait. Questionnaires are commonly used to measure and evaluate anxiety levels to help performers understand and manage their anxiety.