Perception Flashcards
Perception
Understanding and interpreting sensations from a stimulus
Absolute threshold
The least amount of stimulus that is observable
Difference threshold
The smallest amount a stimulus must change so that an observer can perceive a just noticeable difference
Weber’s law
The size of difference threshold is proportional to the stimulus intensity
Perceptual constancy
We see qualities of an object as constant (size, shape, brightness)
Visual depth perception
The perception of cues that indicate the distance is an object
Monocular cues
Cues that do not use two eyes
Interposition
Objects in front are closer
Size
Larger objects are closer
Linear perspective
Objects produce smaller retinal image as they are farther away
Texture gradients
Detail of texture is greater if the surface is closer
Binocular cues
Cues that use two eyes
Binocular or retinal disparity
The difference between the two eyes views. Binocular disparity increases the farther the object is from the observer
Motion parallax
As you move your head,images of close things change position more quickly on the retina then images of distant ones
Gestalt rules
Laws that the brain uses to group or organize elements of a scene
