Definition
The attempt to perform two or more cognitively demanding tasks at the same time. In practice, the brain does not handle these tasks simultaneously but rapidly switches attention between them, which reduces performance and increases the chance of errors on each task.
Plain English
Trying to do several thinking tasks at once. The brain can't really do that — it just jumps back and forth quickly, and things get missed.
Context Anchor
Seen in aviation training discussions about cockpit workload, student performance, and why instructors should avoid overloading a learner with too many tasks at once.
Derivation
From 'multi' (many) and 'tasking' (assigning tasks), originally a 1960s computing term describing how a single processor handled several jobs by switching quickly between them. The aviation use borrows the same idea: a single brain switching between tasks, not actually doing them in parallel.
Why Pilots Care
Believing multitasking is possible leads pilots to divide attention in ways that increase errors, missed items, and loss of situational awareness.
Grounding Statement
A student who is trying to hold altitude, read a checklist, and answer a radio call at the same moment may miss something important because attention is being split.
Intuition Check
Multitasking does not mean the brain is doing several demanding tasks equally well at the same time. In this FAA context, it usually means attention is being divided or switched, which can reduce accuracy and increase mistakes.
Example Sentence 1
The instructor warned the student that trying to copy a clearance, fly the airplane, and program the GPS at the same time was multitasking, and something would slip.
Example Sentence 2
Effective pilots sequence their tasks rather than multitasking so they can give full attention to each step of a checklist or procedure.