Across
- 6. set, a mental predisposition to perceive one thing and not another
- 8. the process by which our sensory receptors and nervous system receive and represent stimulus energies from our environment
- 10. the process by which the eye's lens changes shape to focus near or far objects on the retina
- 12. threshold, the minimum stimulus energy needed to detect a particular stimulus 50% of the time
- 13. process theory, theory that opposing retinal processes enable color vision
- 15. retinal receptors that detect light and are sensitive to movement
- 17. threshold, minimum difference between two stimuli required for detection 50% of the time
- 20. nerve, the nerve that carries neural impulses from the eye to the brain
- 22. the amount of energy in a light waves or sound wave which influences what we perceive as brightness or loudness. Determined by a wave's amplitude
- 23. the central focal point in the retina around which the eye's cones cluster
- 25. transparent structure behind the pupil that changes shape to help focus images on the retina
- 26. dimension of color that is determined by the wavelength of light. Known by the color names
- 28. perception (ESP), controversial claim that perception can occur apart from sensory input such as telepathy or precognition
Down
- 1. the process of organizing and interpreting sensory information enabling us to recognize meaningful objects and events
- 2. converting sensory stimulus energies such as sights and sounds into neural impulses for the brain to interpret
- 3. retinal receptors that are concentrated near the center of the retina and function in daylight or well lit conditions. Detect fine detail and color
- 4. below one's absolute threshold for conscious awareness
- 5. the light sensitive inner surface of the eye, containing the receptor rods and cones plus layers of neurons that begin the processing of visual information
- 7. study of paranormal phenomena including ESP and psychokinesis
- 9. law, a principal that states that in order for two stimuli to be perceived as different, that they must differ by a constant minimum percentage
- 11. processing, information processing guided by higher level mental processes. Draws on experience and expectation.
- 14. adjustable opening in the center of the eye where light enters
- 16. the unconscious activation of certain associations, thus predisposing one's perception and response
- 18. ring of muscle tissue that forms the colored portion of the eye around the pupil and controls the size of the pupil opening
- 19. processing, analysis that begins with the sensory receptors and works up to the brain's integration of sensory information
- 21. adaptation, diminished sensitivity as a result of constant stimulation
- 24. spot, the point at which the optic nerve leaves the eye and creates a blind spot because no receptor cells are located there
- 27. distance from the peak of one light or sound wave to the peak of the next