Across
- 2. smallest amount of energy needed for a person to detect a stimulus 50% of the time
- 4. conscious focus on one stimulus or perception at one time
- 7. characterize deep sleep
- 8. Photoreceptor - for visual acuity and color vision
- 9. when energy is picked up by one (or more) of our senses
- 10. we are taking deliberate actions (problem solving, naming objects, defining words).
- 13. Photoreceptor - for use in dimly-lit conditions
- 14. Central area of the retina where light rays are most sharply focused; greatest density of cones.
- 16. when your senses are exposed to an unchanging stimulus and stop registering that stimulus
- 21. what is ignored while your attention is selectively focused on something else
- 22. characterize being drowsy or relaxed
- 26. Awareness of ourselves and our environment
- 27. Where the optic nerve leaves the eye; there are no photoreceptor cells here.
- 28. characterize active wakefulness
- 31. states there are three different cones that are each sensitive to varying wavelengths of light
- 32. refers to the type of processing of information that starts with the raw data, or the stimuli from the environment
- 33. Transparent disc that changes shape to bring objects into focus.
Down
- 1. characterized by excessive daytime sleepiness and periodic, uncontrollable sleep attacks
- 3. sleep disorder involving regular interruptions of breathing during sleep
- 5. Transmits visual information from the retina to the brain.
- 6. relies heavily on your previous knowledge and experience to influence perceptions
- 11. characterized by the dissatisfaction with the amount or quality of sleep; symptoms include: difficulty falling asleep at bedtime, difficulty staying asleep, etc
- 12. Curved, transparent dome that bends incoming light waves so the image can be focused on the retina.
- 15. states there are three special visual receptors that work in pairs and in an opposing manner
- 17. we are performing automatic actions, often without being aware of them (walking, acquiring phobias, processing sensory details)
- 18. Innermost layer of the eye, where incoming light is converted into nerve impulses; contains photoreceptor cells.
- 19. when the brain selects, organizes, and interprets this information
- 20. the minimum difference between two stimuli needed to detect a difference 50% of the time
- 23. occurs during NREM sleep in response to an abnormal transition from N3 to REM or lighter stage of sleep (also known as sleep walking)
- 24. Opening in the center of the iris that changes size depending on the amount of light in the environment.
- 25. when physical energy is converted into an electrical charge
- 29. Specialized cells that convert physical energy into electrical energy that can be transmitted as nerve impulses to the brain
- 30. Colored area containing muscles that control the pupil.