Across
- 1. / the central focal point in the retina, around which the eye's cones cluster
- 4. Perception / the ability to see objects in three dimensions although the images that strike the retina are two dimensional; allows us to judge distance
- 8. / an organized whole. Gestalt psychologists emphasized our tendency to integrate pieces of information into meaningful wholes
- 9. / the transparent structure behind the pupil that changes shape to help focus images on the retina
- 10. Perception (ESP) / the controversial claim that perception can occur apart from sensory input; includes telepathy, clairvoyance, and precognition
- 11. (three-color) Theory / the theory that the retina contains three different color receptors - one most sensitive to red, one to green, and one to blue- which, when stimulated in combination, can produce the perception of any color
- 14. / the sense or act of hearing
- 15. Spot / the point at which the optic nerve leaves the eye, creating a "blind" spot because no receptor cells are located there
- 16. Detection Theory / a theory predicting how and when we detect the presence of a faint stimulus (signal) amin background stimulation (noise). Assumes there is no single absolute threshold and that detection depends partly on a person's experience, expectations, motivation, and level of fatigue
- 19. Phenomenon / an illusion of movement created when two or more adjacent lights blink on and off in quick succession
- 20. Constancy / perceiving familiar objects as having consistent color, even if changing illumination alters the wavelengths reflected by the object
Down
- 2. Sense / the sense of body movement and position, including the sense of balance
- 3. / the study of paranormal phenomena, including ESP and psychokinesis.
- 5. / the system for sensing the position and movement of individual body parts
- 6. / 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. Law / the principle that, to be perceived as different, two stimuli must differ by a constant minimum percentage (rather than a constant amount)
- 12. Cues / depth cues, such as interposition and linear perspective, available to either eye alone
- 13. Factors Psychology / a branch of psychology that explores how people and machines interact and how machines and physical environments can be made safe and easy to use
- 17. / a ring of muscle tissue that forms the colored portion of the eye around the pupil and controls the size of the pupil opening.
- 18. Nerve / the nerve that carries neural impulses from the eye to the brain