S&P what’s left?.

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Sensation and Perception: How the World Enters the Mind

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Presentation transcript:

S&P what’s left?

Viewing the World in Color! Color solid wavelength (hue) amplitude (brightness) purity (saturation) 2 Mixtures: Subtractive Color Mixing – removing some wavelengths, leaving less light than was originally there. Additive Color Mixing – superimposing lights

Color Theories Opponent Process Theory of Color Vision Trichromatic Theory of Color Vision Human eye has 3 types of receptors sensitive to red, green, blue (primary colors). Color Blindness – inability to distinguish among colors. Dichromats – people who make do with only 2 types of receptors. Opponent Process Theory of Color Vision Color perception depends on receptors that make opposite responses to 3 pairs of colors. Red vs green, yellow vs blue, black vs white. Complementary Colors –produce gray tones when mixed. Afterimage – a visual image that persists after a stimulus is removed.

Visual Cues Binocular cues - clues about distance based on differing views of the two eyes (3D movies) Retinal Disparity - objects within 25 feet project images to slightly different locations on the right & left retinas, so they see different views of the object. Convergence - Seeing the eyes converging toward one another as they focus on closer objects.

Monocular Depth Cue-Clue about distance based on the image in either eye alone (Pictorial Cues) Motion Parallax - we view objects that are closer to us as moving faster than objects that are further away from us Ex. https://www.youtube.com/watch?v=NLTOinDXY38

Change Blindness a change in a visual stimulus is introduced and the observer does not notice it. Ex. https://www.youtube.com/watch?v=VkrrVozZR2c

Visual Cliff (1960s experiment) Depth perception was considered innate and note learned behavior Ex. https://www.youtube.com/watch?v=3WvtEFJGp-8

Perceptual Constancies in Vision Perceptual Constancy – Tendency to experience a stable perception in the face of continually changing sensory input.

Sound Conduction Deafness – Often explained by a lack of sound wave conduction related to the eardrum or ossicles. Sound Localization – a listener's ability to identify the location or origin of a detected sound in direction and distance. See image