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HUMAN FACTORS :pen: is a field that attempts to develop a link between…
HUMAN FACTORS
:pen: is a field that attempts to develop a link between technology and people.
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Cognition
User's goals :
If we know exactly what we want to accomplish, we strive to match it with the accessible knowledge.
Interface designers need to focus attention on the users’ goals
Information presentation:
Greatly influence how easy or difficult it is to digest appropriate pieces of information
Interface designers need to focus attention on the right place
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Perception
Auditory Perception
Haptic (Touch) Perception
Visual Perception
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Physiology
Reading
Reading involves saccades and fixations
Negative contrast improves reading from computer screen
The eye
Size and depth
-visual acuity is ability to perceive detail (limited)
Brightness
-subjective reaction to levels of light
Colour
-made up of hue, intensity, saturation
-blue acuity is lowest
Hearing
Environment
Physical apparatus
Keyboards are insufficiently sized.
Sound
Sounds too loud
Touch
Stimulus received via
receptors in the skin
mechanoreceptors - pressure
thermoreceptors - heat and cold
nociceptors - pain
Movement
Movement time
Dependent on age, fitness etc.
Reaction time
Dependent on stimulus type
Pain - 700ms
Visual signal - 200ms
Audio signal - 150ms