The Eye
Objects are brought into focus on the retina by changes in the curvature of this.
Lens
This is the coiled, fluid-filled tube where sound waves trigger nerve impulses.
Cochlea
These are released by the brain to reduce pain.
Endorphins
This is the principle that two stimuli must differ by a constant proportion for the difference to be perceived.
Weber's Law
Taste and smell
This is the adjustable opening located in the center of the eye.
Pupil
This determines the pitch of a sound.
The frequency of the sound wave
When the nose is plugged and eyes are closed, an individual cannot distinguish the difference between a pepper and an apple. This explains the importance of.
Sensory Interaction
Standing on a hill on a pitch dark night, most of us would see a flame atop another hill 30 miles away. This is an example of.
Absolute Threshold
The pitch of a sound is measured in.
Hertz (Hz)
This controls dilation and constriction of the pupil.
This theory explains high sounds.
Place Theory
The system for sensing position and movement of body parts is.
Kinesthesis
While a woman was giving directions to a student, two experimenters interrupted by passing between them carrying a door. The woman's failure to notice that the student was replaced by a different person is an example of this.
This is produced through the quick succession of briefly flashed images.
Stroboscopic Movement
This theory explains how individuals who are colorblind to red and green may still see yellow.
The Opponent-Process Theory
This theory explains low sounds.
Frequency Theory
This theory explains how large-fiber activity in the spinal cord can prevent pain signals from reaching the brain.
Gate-Control Theory
Top-Down Processing
The controversial claim that awareness can occur apart from sensory input.
ESP
This theory states that the retina contains 3 kinds of color receptors.
The Young-Helmholtz Theory
This is the specific location for transduction in the ear.
Cilia on the basilar membrane inside the cochlea
This is the phenomenon where the stimulation of one sense triggers the experience of another sense.
Synesthesia
This theory focuses on the idea that personal expectations and motivations influence the level of absolute threshold.
Signal Detection Theory
This is a top-down process that recognizes objects without being deceived by changes in their color, brightness, shape, or size.
Perceptual Constancy