Physiology
Definition
Physiology
Physiology is the study of the human body’s systems and biomechanics, focusing on its responses, capabilities, and physical limitations in relation to product use.
Definition
Biomechanics
Research and analysis of the mechanics (operation of our muscles, joints,
tendons, etc.) of the human body.
Key Physiological Factors in Design
Definition
Physiology Factors
Human factor data related to physical characteristics used to optimise the
user’s safety, health, comfort and performance.
Visual Accuracy
- Visual accuracy refers to the sharpness or clarity of vision.
- It can be reduced by factors like age, poor lighting, screen glare, or uncorrected vision problems.
- Designs should ensure that text is legible (considering font size, type, and contrast), and that screens and interfaces are easy to read.
Colour Perception
- Users with difficulty distinguishing certain colours (e.g. red-green colour blindness).
- Designs should avoid relying solely on colour to communicate information (e.g. using red for “stop” without a label).
- Use strong contrast, patterns, or icons in addition to colour cues.
Approximately 8% of men and 0.5% of women have some form of color blindness, making it crucial to consider in design.
Strength
- Users vary in strength based on age, gender, health, and fatigue levels.
- Tasks that require too much physical effort can exclude users or lead to strain.
- Levers, grips, and assistive mechanisms can reduce required effort.
Muscle Control
- Fine motor control is the ability to perform precise movements.
- It can be limited in young children, older adults, or users with certain conditions.
- Designs should avoid requiring precise or delicate movements.
- Buttons should be large and well-spaced, avoid requiring high dexterity.
