Human Computer Interaction Quiz

Study Notes

Human capabilities involve information i/o, storage, processing, and application, influenced by emotions and individual differences.

Information is processed and applied through reasoning, problem-solving, skill, and error.

The human visual system consists of two stages: physical reception of stimulus and processing and interpretation of stimulus.
The eye receives light and transforms it into electrical energy, focusing upside-down on the retina.
The retina contains rods for low light vision and cones for color vision.
Ganglion cells detect pattern and movement.

Visual angle indicates how much of the view an object occupies, relating to size and distance from the eye.
Visual acuity is limited and perceives familiar objects as constant size despite changes in visual angle.
Cues like overlapping help perception of size and depth.
Brightness is a subjective reaction to levels of light, affected by luminance, and measured by just noticeable difference.
Visual acuity increases with luminance, as does flicker.
Colour is made up of hue, intensity, and saturation, with cones sensitive to color wavelengths.
The visual system compensates for movement, changes in luminance, and context to resolve ambiguity, but can lead to optical illusions.

Optical illusions occur due to overcompensation, such as the Ponzo illusion and the Muller Lyer illusion.

Reading involves several stages: visual pattern perception, decoding using internal representation of language, and interpretation using knowledge of syntax, semantics, and pragmatics.
Reading involves saccades and fixations, with perception occurring during fixations.
Word shape is important to recognition, and negative contrast improves reading from computer screens.

Hearing provides information about the environment, including distances, directions, and objects.
The physical apparatus of hearing includes the outer ear, middle ear, and inner ear, which transmit sound waves as vibrations to the inner ear.
Sound is characterized by pitch, loudness, and timbre.
Humans can hear frequencies from 20Hz to 15kHz, with less accuracy distinguishing high frequencies than low.
The auditory system filters sounds and can attend to sounds over background noise, such as the cocktail party phenomenon.

Touch provides important feedback about the environment, particularly for those who are visually impaired.
Stimulus is received via receptors in the skin, including thermoreceptors, nociceptors, and mechanoreceptors.
Some areas are more sensitive than others, such as the fingers.