What is a primary effect of stress on pilot performance?

The primary effect of stress on pilot performance is a detracted cognitive function. Under stress, a pilot's mental capabilities can be significantly impaired, leading to difficulties in processing information, maintaining focus, and executing tasks effectively. Stress can result in cognitive overload, where the pilot is unable to manage the demands being placed upon them, consequently affecting judgment, problem-solving ability, and overall flight safety. This can lead to errors and lapses in attention, which are critical components in aviation scenarios where precision and quick reaction times are required. Understanding how stress impacts cognitive function is vital for pilots to recognize and manage their stress levels effectively in order to maintain a high level of performance in flight operations.