Chapter 8 Flashcards
What is color
Color is sensory response to electromagnetic radiation in spectrum
What are types of colors
- Primary colors (red, yellow and blue)
- Secondary (Green, orange and purple)
- Tertiary colors (red-orange, blue-purple, yellow-green)
What are secondary colors
They are formed by mixing primary colors
What are Tertiary colors
They are formed by mixing one primary color and one secondary color
What is color harmony
If the colors arrangement please human then they are in harmony
What are the formulas for color harmony
- analogous colors
- complementary colors
What are analogous colors
Such color which are near to each other. e.g. color wheel
What is complementary colors
Complementary colors are opposed to each other. e.g. flower on plant. Nature created color harmony by complementary colors.
Which part of eye detect colors
Photo receptor cells
Does eye color perception decreases over time
Yes
What is binocular vision or stereopsis
Watching 3D vision also called free fusion
What is stereo pair
2 images get together to form a 3D image for an eye. These 2 images are called stereo pair.
What are weaker clues of 3D
- Atmospheric perspective
- Speed of movement
- Observed detail
What are 3 stages of reading
- Visual pattern perceived
- Decoded using internal representation of language
- Interpreted using knowledge of syntax, semantics
What is saccades in reading
Moving eye continuously in reading
What is fixation in reading
Eyes stable on a thing
What is regression in reading
Eye move backwards and forwards during reading
What font size is legible
Font size 9-12
Why reading on screen is slower
- Longer line length
- Few words on the page
- Orientation of page on screen
What are two types of text contrasts
- Positive contrast
- Negative contrast
What is negative contrast
Dark characters on light screen
What is positive contrast
Light characters on dark screen
What are 3 parts of ear
- Outer ear
- Middle ear
- Inner ear
What are 3 sound characteristics
- Pitch
- Loudness
- Timbre
What is pitch
Frequency of sound
What is loudness
Proportional to the amplitude of sound
What is timbre
Type of sound
What is cocktail party effect
Focus on a specific sound in different sounds
What is haptic perception
Touch
What are 3 types of human haptic sensing
- Kinesthesia
- Proprioception
- Tactile
What is Tactile sensing
Sensation through skin
What is Kinesthesia sensing
sense of limb motions
What are 3 receptors in Kinesthesia sensing
- Rapidly adapting
- Slowly adapting
- Positional receptors
What is Proprioception sensing
Awareness of limb location
Can touch be active and passive
Yes
What are 3 stimulus received via sensory receptors in the skin
- Thermoreceptors (heat and cold)
- Nociceptors (pain)
- Mechanoreceptors (pressure)
What receptor used mostly in HCI
Mechanoreceptors (pressure)
What is formula of time taken to respond to stimulus
reaction time + movement time
Reaction time depends upon which 3 stimulus types
- visual
- auditory
- pain
movement time depends upon which factors
Age, fitness
