What effect does high workload have on aircrew performance?

High workload can significantly diminish aircrew performance, particularly by leading to errors and decreased situational awareness. When aircrew members are tasked with an extensive workload, their cognitive resources become strained. This can result in difficulties in processing information, focusing on critical tasks, and maintaining a clear overview of their surroundings.

As workload increases, aircrew members may become overwhelmed, leading to rushed decisions or missed cues in the environment, which are crucial for effective situational awareness. High workloads can hinder the ability to monitor instruments, communicate effectively with team members, and prioritize tasks appropriately. Consequently, the likelihood of making mistakes during critical phases of flight increases, underscoring the relationship between high workload and impaired performance.

In contrast, the other options suggest positive or neutral outcomes from high workload, which do not reflect the research and understanding of human factors and performance in aviation contexts.