ATPL Human Factors (CAA) study guide
ATPL Human Factors · Work through your exam, one topic at a time.
ATPL Human Factors - also listed as Human Performance and Limitations - is the ground-school subject that examines how the human pilot performs, fails and recovers within the aviation system. It is taken by candidates working toward a commercial or airline transport pilot licence under EASA and similar regulatory frameworks, and it is usually studied alongside Air Law, Meteorology, Navigation and Principles of Flight. The ATPL Human Factors study guide has 10 sections and about 2,627 words.
01Human Factors: Basic Concepts and General Aviation Psychology
Human Factors (HF) at ATPL level asks you to explain how people, procedures and machines interact, and to apply models rather than recite definitions. The exam favours the ICAO SHELL model, Reason's model and general-aviation psychology such as hazardous attitudes and decision traps.
299 words, about 1 min02Basic Aviation Physiology and Health Maintenance
Physiology questions ask for mechanisms and operational consequences: hypoxia, gas laws, decompression, spatial disorientation and fitness to fly. Learn the numbers and the correct response, not only the name.
323 words, about 2 min03Basic Aviation Psychology: Information Processing, Perception, Attention and Memory
Questions on information processing trace a failure from stimulus to response and ask you to name the stage: sensation, perception, attention, working memory or long-term memory. Input passes through sensory registers; perception is an active, top-down construction using expectation and schemas, not a passive copy.
266 words, about 1 min04Human Error and Reliability, Error Models and Threat and Error Management
You must classify errors, place them in a model and apply Threat and Error Management (TEM), rather than stopping at 'human error'. An error is an unintended deviation from intention or standard; a violation is a deliberate deviation, though not necessarily reckless.
269 words, about 1 min05Decision Making, Judgement and Risk Management
Decision-making questions ask you to apply a structured model, recognise bias and manage risk explicitly rather than by feel. DECIDE: Detect, Estimate, Choose, Identify, Do, Evaluate.
232 words, about 1 min06Crew Resource Management, Leadership, Teamwork and Communication
CRM tests observable behaviours - communication, leadership, teamwork, briefings and assertiveness - not personality. Closed-loop communication: send, acknowledge, verify.
237 words, about 1 min07Human Factors in Automation
Automation questions probe mode awareness, flight mode annunciator (FMA) interpretation, complacency, skill degradation and human-centred design. Automation ranges from simple autopilot modes to full flight-envelope protection.
254 words, about 1 min08Workload and Situational Awareness
Workload and situational awareness (SA) questions ask you to define, measure and manage both. Workload is the mental and physical effort needed for tasks; it can be too high (overload) or too low (underload, boredom).
240 words, about 1 min09Fatigue, Sleep, Circadian Rhythms and Flight/Duty Time Limitations
Fatigue questions require sleep physiology, circadian effects and flight/duty time rules, not just 'get more sleep'. Sleep cycles about 90 minutes; NREM deep sleep restores physically, REM supports cognition.
260 words, about 1 min10Stress, Arousal, Fatigue and Performance Under Pressure
Stress and arousal questions ask you to explain the inverted-U, distinguish acute from chronic stress, and show how performance collapses under pressure. Stress is the response to a demand; eustress can improve performance, while distress impairs it.
247 words, about 1 min