Which illusion might lead a pilot to misinterpret a turn as level flight?

The correct choice pertains to the "elevator illusion." This illusion occurs when a pilot experiences a sudden change in vertical acceleration. When an aircraft climbs or descends rapidly, the pilot's body may interpret this movement as a change in orientation rather than an actual vertical movement. For instance, during a sudden upward acceleration, the pilot might feel as if they are climbing when they are actually level or losing altitude, leading to the misinterpretation that the aircraft is in level flight.

This situation can create confusion during maneuvers when the pilot believes they are flying straight and level despite the aircraft’s actual changes in altitude. Understanding this illusion is crucial for maintaining situational awareness and preventing potential mishaps caused by misinterpretation of the aircraft's position in space. Recognizing such sensory discrepancies is vital in aviation safety training.