WEEK 3- PSYCH-105 (Sensation & Perceptions, Color Theory)

Sensation & Perception

• Absolute Threshold

  • minimum stimulation needed to register a particular stimulus 50% of the time

  • Ex: For hearing, it is a watch ticking 20 feet away

• Signal Detection Theory

  • Model for predicting how and when a person will detect a weak stimulus partly based on context

• Weber’s Law

  • We perceive differences on a logarithmic rather than linear scale

• Transduction

  • Transduction is the process of converting one form of energy or information into another.

  • Short waves = blue

  • Longer waves = red

• Chromosteropis

  • Pure colors at the same distance from the eye appear at different distance

• Amplitude

  • The amount of energy in a given lightwave

• Cones

  • a type of photoreceptor cell in the retina. They give us our color vision

• Edge Detection

  • is an image processing technique for finding the boundaries of objects within images.

• Parallel Processing

  • Ability to process & analyze many aspects of the situation at once

• Depth Perception

  • Allows us to estimate distances between objects and ourselves

• Occlusion

  • An object that blocks the view of another object must be in front of it

• Texture Gradient

  • the gradual change in the visual texture of an object or surface as it recedes in depth from the observer

• Relative Height

  • Objects that appear higher in our visual field are farther away than objects that appear lower

• Familiar Size

  • Knowledge of the normal size of certain objects can provide cues to depth

• Linear Perspective

  • a type of depth prompt that the human eye perceives when viewing two parallel lines that appear to meet at a distance

• Aerial Perspective

  • a phenomenon in which distant objects tend to appear blurry and bluish in nature.

• Relative Brightness

  • how individuals interpret and compare the brightness levels of different stimuli.

• Proximity

  • The closer figures are to each other, the more we tend to group them together perception

• Good Continuation

  • A preference for organizing form in a way where contours continue smoothly along their original course

• Closure

  • the sense of resolution or completion of a life event, problem, or situation

• Perceptual Closure

  • a process whereby an incomplete stimulus is perceived to be complete

• Ambiguous Figure

  • a picture that can be interpreted in more than one way.

• Bottom up Processing

  • when the brain processes sensory information and uses clues to understand stimuli.

Color Theory

• Hue

  • The study of how different colors affect behaviors, thoughts and emotions is known as color psychology

• Monochromatic

  • Monochromatic color schemes consist of one hue with different saturation and brightness. So, to create a monochromatic color scheme, pick one color or hue from the color wheel and adjust its saturation or brightness for each swatch.

• Analogus

  • Colors that are side by side on the 12-part color wheel. Colors like green, green-yellow and yellow.

• Complementary:

  • Two colors that are opposite on the color wheel. Colors like green and purple.

• split-complementary color scheme

  • uses two colors across the color wheel, with those two colors lying on either side of the complementary color.

• Triadic

  • Any three colors that are of equal distance on the color wheel.

• Tetradic

  • green with red and blue with yellow