Unit 3

4. A coiled, bony, fluid filled tube in the inner ear
7. A theory predicting how and when we detect the presence of a faint stimulus amid background stimulation
9. The central focal point in the retina, around which the eyes cones cluster
11. The focusing of conscious awareness on a particular stimulus
12. The theory that opposing retinal processes enable color vision
15. Conversion of one form of energy into another

1. Analysis that begins with the sensory receptors and works up to the brain’s integration of sensory information
2. A minimum difference between two stimuli required for detection 50% of the time
3. The theory that the spinal cord contains a neurological gate that blocks pain signals or allows them to pass on to the brain
5. The sense or act of hearing
6. The sense of smell
8. The perceptual tendency to organize stimuli into coherent groups
10. The process by which eye’s lens changes shape to focus near or far objects on the retina
13. A mental predisposition to perceive one thing and not another
14. An organized whole