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Across 1. theory of pitch that states that pitch is related to the speed of vibrations in the basiliar membrane 4. theory of pitch that states that different pitches are experienced by the stimulation of hair cells in different locations on the organ of Corti 7. the assumption that an object that appears to be blocking part of another object is in front of the second object and closer to the viewer 8. the smallest difference between two stimuli that is detectable 50% of the time 10. the tendency to complete figures that are incomplete 13. ares of the brain located just above the sinus cavity and just below the frontal lobes that receive information from the olfactory receptor cells 15. an explanation of motion sickness in which the information from the eyes conflicts with the information from the vestibular senses, resulting in dizziness, nausea, and other physical discomfort 16. as a monocular cue, the brain's use of information about the changing thickness of the lens of the eye in response to looking at objects that are close or far away 17. area in the retina where the axons of the three layers of retinal cells exit the eye to form the optic nerve; insensitive to light 18. the process that occurs when special receptors in the sense organs are activated, allowing various forms of outside stimuli to become neural signals in the brain 20. the visible part of the eye 21. the tendency for parallel lines to appear to converge on each other 22. short tunnel that runs from the pinna to the eardrum 25. the recovery of the eye's sensitivity to visual stimuli in light after exposure to darkness 28. the tendency to perceive the apparent brightness of an object as the same even when the light conditions change 30. the tendency to perceive two things that happen close together in time as being related 33. visual illusions in which the figure and ground can be reversed 35. the tendency for textured surfaces to appear to become smaller and finer as distance from the viewer increases 39. psychological experience of sound that corresponds to the frequency of the sound waves 40. visual sensory recepts found at the back of the retina, responsible for noncolor sensitivity to low levels of light 41. visual sensory receptors at the back of the retina, responsible for color vision and shapness of vision 42. cues for perceiving depth based on both eyes 43. the lowest level of stimulation that a person can consciously detect 50% of the time the stimulation is present 45. the use of preexisting knowledge to organize individual features into a unified whole 48. sense of the location of body parts in relation to the ground and each other 51. the tendency to perceive objects, or figures, as existing on a background 52. bundle of axons from the hair cells in the inner ear 53. cycles of waves per second, a measurement of frequency 54. perception that occurs when objects that a person expects to be of a certain size appear to be small and are, therefore, assumed to be much farther away 55. tendency of the brain to stop attending to constant, unchanging inforation 56. the sensation of smell 57. the rotation of the two eyes in their sockets to focus on a single object, resulting in greater convergence for closer objects and lesser convergence if objects are distant

Down 2. theory of color vision that proposes four primary colors with cones arranged in pairs (red-green, blue-yellow) 3. the tendency to interpret the shape of an object as being constant, even when its shape changes on the retina 5. snail-shaped structure of the inner ear that is filled with fluid 6. the process of converting outside stimuli, such as light, into neural activity 9. the analysis of the smaller features to build up to a complete perception 11. the sensations of touch, pressure, temperature, and pain 12. the tendency to perceive things as simply as possible with a continuous pattern rather than with a complex, broken-up pattern 14. tendency of sensory receptor cells to become less responsive to a stimulus that is unchanging 15. the body senses consisting of the skin senses, the kinesthetic sense, and the vestibular senses 19. the ability to perceive the world in three dimensions 23. the recovery of the eye's sensitivity to visual stimuli in darkness after exposure to bright lights 24. the difference in images between the two eyes, which is greater for objects that are close and smaller for distant objects 26. the change in the thickness of the lens as the eye focuses on objects that are far away or close 27. the tendency to perceive things a certain way because previous experiences or expectations influence those perceptions 29. theory of color vision that proposes three types of cones (red, blue, and green) 31. the sensations of movement, balance, and body position 32. the haziness that surrounds objects that are farther away from the viewer, causing the distance to be perceived as greater 34. the tendency to interpret an object as always being the same actual size, regardless of its distance 36. cues for perceiving depth based on one eye only 37. theory of pitch that states that frequencies above 100 Hz cause the hair cells to fire in a volley pattern, or take turns in firing 38. the perception of motion of objects in which close objects appear to move more quickly than objects that are farther away 44. the tendency to perceive objects that are close to each other as part of the same grouping 46. the tendency to perceive things that look similar to each other as being part of the same group 47. the method by which the sensations experienced at any given moment are interpreted and organized in some meaningful fashion 49. images that occur when a visual sensation persists for a brief time even after the original stimulus is removed 50. the sensation of a taste