Which field studies how memory, reasoning, motor response and perception influence interactions between users and devices?

• A. Biomechanics
• B. Cognitive ergonomics
• C. Environmental factors
• D. Alertness

Answer: (B)

Memory, reasoning, perception, and motor response shape how people interact with devices, and that interplay is the focus of cognitive ergonomics. This field looks at how information is perceived, processed, remembered, and acted upon, and how interface design can support or hinder those mental processes. By studying cognitive workload, attention, memory limits, decision making, and the way people interpret and respond to feedback, designers create interfaces that align with how the mind works—reducing errors and speeding up interaction. For example, presenting information clearly so users don’t have to rely on memorized steps, using recognizable icons, consistent layouts, and immediate, understandable feedback all stem from cognitive ergonomics principles. While biomechanics deals with physical interactions of the body with devices, and environmental factors cover external conditions, cognitive ergonomics specifically addresses the mental processes that influence interaction.