AP psych perception

1. Bottom-up processing : This is a type of sensory processing where perception begins with the basic sensory information and works upwards to form a complete perception. For example, when you see individual letters and then recognize them as words, your brain is engaging in bottom-up processing by starting with the basic visual information and building it up into a meaningful word.

2. Top-down processing : In contrast to bottom-up processing, top-down processing involves using pre-existing knowledge and expectations to interpret sensory information. For instance, if you're in a dimly lit room and see a blurry shape, your brain might use your prior knowledge of the room's layout to interpret that shape as a familiar object, like a chair or a table.

3. Selective attention : This refers to the ability to focus on a specific stimulus while ignoring others. An example of selective attention is being able to listen to one person speaking at a noisy party while tuning out the background noise and other conversations.

4. Cocktail party effect : This is a phenomenon where despite a lot of background noise, you're able to focus your attention on a single conversation of interest. It's like being at a cocktail party and being able to tune in to the person you're talking to even though there's a lot of other chatter around you.

5. Relationship between texting and accidents : Research has shown that texting while driving significantly increases the risk of accidents. This is because texting diverts attention away from the road, leading to slower reaction times and an increased likelihood of collisions.

6. Inattentional blindness : This occurs when we fail to notice unexpected stimuli in our environment because our attention is focused elsewhere. A classic example is the "invisible gorilla" experiment, where participants focused on counting basketball passes and failed to notice a person in a gorilla suit walking through the scene.

7. Change blindness : Similar to inattentional blindness, change blindness refers to the inability to detect changes in a scene, particularly when those changes occur gradually or when attention is diverted elsewhere. An example is failing to notice when someone changes their hairstyle because you're not paying attention to that detail.

8. Transduction : This is the process by which sensory stimuli are converted into neural impulses that can be interpreted by the brain. For example, when light enters the eye, it's transduced into electrical signals that the brain can process and interpret as visual information.

9. Absolute threshold : This is the minimum amount of stimulation needed for a person to detect a stimulus 50% of the time. An example is the faintest sound a person can hear or the dimmest light they can see in ideal conditions.

10. Signal detection theory : This theory explains how people detect faint stimuli amid background noise. It suggests that detection depends not only on the strength of the signal but also on factors like the person's sensitivity and decision-making criteria. An example is detecting a faint light in a dark room despite other distractions.

11. Subliminal stimulation : This refers to the presentation of stimuli below the threshold of conscious awareness. While controversial, some believe that subliminal stimuli can influence behavior or attitudes without conscious awareness.

12. Subliminal stimulation in advertising : While there's debate about its effectiveness, some advertisers have attempted to use subliminal messages to influence consumer behavior, although the evidence for its effectiveness is limited.

13. Difference threshold : Also known as the just noticeable difference, this is the smallest change in a stimulus that a person can detect. An example is noticing a change in the brightness of a light or the volume of a sound.

14. Weber's Law : This principle states that the just noticeable difference of a stimulus is proportional to the original stimulus intensity. In other words, the bigger the stimulus, the bigger the change needed for detection to occur.

15. Sensory adaptation : This refers to a decrease in sensitivity to a constant stimulus over time. An example is not noticing the smell of your own home because you've become accustomed to it.

16. Wavelength : In the context of light and sound, wavelength refers to the distance between successive peaks of a wave. In light, different wavelengths correspond to different colors, while in sound, they correspond to different pitches.

17. Hue : This is the attribute of color that distinguishes one color from another, such as red from blue or green from yellow.

18. Amplitude : Amplitude refers to the height of a wave, which determines the intensity or brightness of a stimulus in the case of light, or the loudness of a sound.

19. Intensity : Intensity refers to the amount of energy in a wave, which corresponds to the brightness of a light or the loudness of a sound.

20. Way light enters the eye : Light enters the eye through the cornea, then passes through the pupil, which regulates the amount of light entering the eye. It then goes through the lens, where it's focused onto the retina at the back of the eye.

21. Rods/Cones : These are photoreceptor cells in the retina that are responsible for vision. Rods are sensitive to low light levels and are responsible for night vision, while cones are responsible for color vision and detail in bright light.

22. Bipolar/Ganglion cells : These are types of cells in the retina that play a role in transmitting visual information to the brain. Bipolar cells receive signals from rods and cones and pass them on to ganglion cells, which then transmit the signals to the brain via the optic nerve.

23. Optic nerve : The optic nerve is a bundle of nerve fibers that carries visual information from the retina to the brain, where it's processed into visual perception.

24. Blindspot : The blind spot is an area on the retina where the optic nerve exits the eye, and there are no photoreceptor cells. This creates a small area in the visual field where we are unable to detect light.

25. Fovea : The fovea is a small depression in the retina where visual acuity is highest. It contains a high concentration of cone cells and is responsible for sharp central vision.

26. Feature detection : Feature detection is a process in visual perception where specialized neurons in the brain respond to specific features of a stimulus, such as lines, edges, or movement.

27. Parallel processing : Parallel processing is the ability of the brain to simultaneously process multiple aspects of a stimulus, such as color, motion, and shape, in different parts of the brain.

28. Young-Helmholtz Trichromatic theory : This theory of color vision suggests that there are three types of cone cells in the retina, each sensitive to a different range of wavelengths corresponding to red, green, and blue. All other colors are perceived through combinations of these three primary colors.

29. Afterimages : Afterimages are visual illusions that occur after staring at a stimulus for an extended period and then looking away. They result from lingering activity in the visual system and can appear as inverted or complementary colors.

30. Opponent-Process theory : This theory of color vision proposes that color perception is based on pairs of opposing colors, such as red-green, blue-yellow, and black-white. Activation of one color in the pair inhibits the perception of the other.

31. Amplitude/volume : In the context of sound, amplitude refers to the height of sound waves, which determines the volume or loudness of the sound. Higher amplitudes correspond to louder volumes, while lower amplitudes correspond to softer volumes.

32. Pitch/frequency : Pitch refers to the perceived frequency of a sound wave, which determines how high or low the sound is perceived. Higher frequencies correspond to higher pitches, such as the chirping of a bird, while lower frequencies correspond to lower pitches, such as the rumble of thunder.

33. Decibels : Decibels (dB) are a unit of measurement used to quantify the intensity or loudness of a sound. The higher the decibel level, the louder the sound.

34. Path sound follows in the ear : Sound waves enter the ear through the outer ear and travel down the ear canal to the eardrum, causing it to vibrate. These vibrations are then transmitted through the middle ear bones (hammer, anvil, and stirrup) to the cochlea in the inner ear, where they are converted into neural signals by hair cells.

35. Cilia : In the context of the ear, cilia are tiny hair-like structures located on the hair cells in the cochlea. When sound vibrations cause the cilia to bend, it triggers the release of neurotransmitters, which in turn sends neural signals to the brain for processing.

36. Conduction hearing loss : Conduction hearing loss occurs when there is a problem with the conduction of sound waves through the outer or middle ear, such as blockages in the ear canal or damage to the eardrum or middle ear bones. This type of hearing loss can often be corrected with medical intervention or hearing aids.

37. Sensorineural hearing loss : Sensorineural hearing loss occurs when there is damage to the hair cells in the cochlea or to the auditory nerve, preventing sound signals from being transmitted effectively to the brain. This type of hearing loss is typically permanent and may require hearing aids or cochlear implants for management.

38. Cochlear implants : Cochlear implants are electronic devices that are surgically implanted into the cochlea to provide sound perception for individuals with severe to profound sensorineural hearing loss. They bypass damaged hair cells and directly stimulate the auditory nerve, allowing for improved hearing ability.

39. Theories of hearing : There are three main theories of hearing: place theory, frequency theory, and the volley principle. Place theory proposes that different frequencies of sound stimulate different areas along the basilar membrane of the cochlea, leading to perception of pitch. Frequency theory suggests that the frequency of a sound wave corresponds to the rate at which the auditory nerve fires, allowing the brain to perceive pitch. The volley principle proposes that neurons in the auditory system alternate firing in sequence to achieve higher frequencies than would be possible with individual neurons firing continuously.

40. Four sensations of touch : The four primary sensations of touch are pressure, warmth, cold, and pain. These sensations are detected by specialized receptors in the skin and are important for interacting with the environment and detecting potential threats.

41. Gate-control theory : The gate-control theory of pain proposes that there is a "gate" mechanism in the spinal cord that can modulate the transmission of pain signals to the brain. According to this theory, non-painful input, such as rubbing or massaging an injured area, can close the gate and inhibit the transmission of pain signals, thereby reducing the perception of pain.

42. Endorphins : Endorphins are neurotransmitters produced by the body in response to pain or stress. They act as natural painkillers and can produce feelings of euphoria or well-being, similar to the effects of opioid drugs.

43. Phantom limb pain : Phantom limb pain is the sensation of pain or discomfort perceived in a limb that has been amputated or lost. It is thought to arise from changes in the nervous system following limb loss, leading to the perception of pain signals originating from the absent limb.

44. Biopsychosocial theory of pain : The biopsychosocial theory of pain emphasizes the interaction between biological, psychological, and social factors in the experience of pain. It recognizes that pain perception is influenced not only by physical factors, such as tissue damage or inflammation, but also by psychological factors, such as mood, stress, and past experiences, as well as social factors, such as cultural norms and social support.

45. Controlling pain : Pain can be managed through a variety of techniques, including medication, physical therapy, relaxation techniques, cognitive-behavioral therapy, and alternative therapies such as acupuncture or massage. The most effective approach to pain management often involves a combination of these strategies tailored to the individual's needs.

46. Five basic tastes : The five primary tastes are sweet, sour, salty, bitter, and umami. These tastes are detected by taste receptors on the tongue and play an important role in identifying and evaluating food.

47. Kinesthesis : Kinesthesis is the sense that enables us to perceive the position and movement of our own bodies. It involves receptors located in muscles, tendons, and joints that provide information about the body's position and movements to the brain.

48. Vestibular sense : The vestibular sense is the sense of balance and spatial orientation, mediated by the vestibular system located in the inner ear. It detects changes in head position and movement and helps us maintain balance and coordination.

49. Sensory interaction : Sensory interaction refers to the way in which different sensory modalities interact with each other and influence each other's perception. For example, the flavor of food is influenced by both taste and smell, and our perception of the world around us is shaped by the integration of information from multiple senses.

50. Embodied cognition : Embodied cognition is the idea that cognitive processes are influenced by bodily sensations, gestures, and other physical states. For example, research has shown that physical warmth can influence perceptions of social warmth, and bodily movements can affect cognitive processes such as problem-solving and decision-making.

51. Perceptual set : Perceptual set refers to a predisposition or expectation to perceive something in a particular way, based on prior experience, context, or motivation. For example, if you expect to see a face in a random arrangement of objects, you may be more likely to perceive one even if it's not actually there.

52. Motivation/emotion and perception : Motivation and emotion can influence perception by directing attention, shaping perceptual biases, and influencing interpretation of sensory information. For example, hungry individuals may perceive food-related stimuli more saliently, and emotionally charged events may be remembered more vividly.

53. ESP (Extrasensory perception) : ESP refers to the purported ability to acquire information through means other than the recognized senses. The three main types of ESP are telepathy (mind-to-mind communication), clairvoyance (perceiving remote events or objects), and precognition (predicting future events).

54. Parapsychology : Parapsychology is the scientific study of paranormal phenomena, including ESP, psychokinesis (the ability to influence objects with the mind), and near-death experiences. It aims to investigate these phenomena using rigorous scientific methods and to understand their underlying mechanisms.

55. Testing ESP : Testing ESP involves designing experiments to assess individuals' ability to demonstrate paranormal abilities under controlled conditions. These experiments often use methods such as card guessing tests, remote viewing tasks, or random event generators to measure participants' performance against chance expectations.

alt : Gestalt: Gestalt psychology is a school of thought that emphasizes the holistic perception of objects and patterns. It suggests that we perceive the whole of an object or scene, rather than its individual parts. For example, when we look at a picture, we perceive it as a unified whole, rather than a collection of lines and shapes.

57. Figure-ground : Figure-ground perception refers to the ability to distinguish between an object of interest (the figure) and its background (the ground) in a visual scene. This principle allows us to focus on important objects while ignoring irrelevant background details.

58. Grouping : Grouping refers to the tendency to organize elements into meaningful wholes or patterns based on certain principles, such as proximity, similarity, continuity, and closure. This helps us make sense of complex visual stimuli by grouping related elements together.

59. Proximity : Proximity is a principle of grouping that refers to the tendency to perceive objects that are close to each other as belonging together. For example, when we see a group of dots arranged closely together, we perceive them as a single group rather than individual dots.

60. Continuity : Continuity is a principle of grouping that refers to the tendency to perceive continuous lines or patterns, even when they are interrupted or overlapped by other objects. This allows us to perceive smooth, flowing patterns rather than disjointed or fragmented ones.

61. Closure : Closure is a principle of grouping that refers to the tendency to perceive incomplete figures as complete or whole. Even when parts of a figure are missing or obscured, our brains fill in the missing information to perceive the figure as complete.

62. Depth perception : Depth perception is the ability to perceive the three-dimensional structure of objects and to judge distances between objects in space. It relies on a variety of cues, both monocular and binocular, that provide information about depth and distance.

63. Visual cliff experiments : Visual cliff experiments are used to study depth perception in infants and animals. They involve a glass-covered platform with a shallow side and a deep side. Infants are placed on the platform and encouraged to crawl or walk, and researchers observe their behavior to determine whether they perceive the drop-off and avoid it.

64. Binocular cues : Binocular cues to depth perception rely on the use of both eyes and include binocular disparity (the difference in the retinal images of the two eyes) and convergence (the inward movement of the eyes when focusing on nearby objects). These cues provide information about the relative distances of objects in space.

65. Monocular cues : Monocular cues to depth perception require only one eye and include cues such as relative size, interposition, linear perspective, texture gradient, motion parallax, and accommodation. These cues provide information about depth and distance based on the characteristics of the visual scene.

66. Stroboscopic movement : Stroboscopic movement is an illusion of motion that occurs when a rapid series of slightly different images is presented in succession, such as in a flipbook or a movie. The brain perceives the individual images as a continuous sequence of motion.

67. Phi phenomenon : The phi phenomenon is an illusion of motion that occurs when two or more stationary lights are flashed in succession in different locations. The brain perceives the lights as moving between the two locations, creating the illusion of motion.

68. Relative height : Relative height is a monocular cue to depth perception that relies on the position of objects in the visual field. Objects that are higher in the visual field are perceived as farther away, while objects that are lower in the visual field are perceived as closer.

69. Relative motion : Relative motion is a monocular cue to depth perception that relies on the perceived movement of objects as we move through the environment. Objects that appear to move more slowly are perceived as farther away, while objects that appear to move more quickly are perceived as closer.

70. Relative size : Relative size is a monocular cue to depth perception that relies on the perceived size of objects in the visual field. Objects that appear larger are perceived as closer, while objects that appear smaller are perceived as farther away.

71. Interposition : Interposition is a monocular cue to depth perception that occurs when one object partially blocks the view of another object. The blocked object is perceived as farther away, while the blocking object is perceived as closer.

72. Linear perspective : Linear perspective is a monocular cue to depth perception that relies on the convergence of parallel lines in the visual field. As parallel lines recede into the distance, they appear to converge toward a vanishing point, creating the illusion of depth.

73. Light and shadow : Light and shadow is a monocular cue to depth perception that relies on differences in brightness and shadowing to perceive depth and form. Objects that are illuminated more brightly are perceived as closer, while objects that are in shadow are perceived as farther away.

74. Perceptual constancy : Perceptual constancy is the tendency to perceive objects as maintaining stable properties, such as size, shape, color, and brightness, despite changes in the sensory input. This allows us to recognize objects even when they are viewed from different angles or under different lighting conditions.

75. Restored vision and sensory restriction : Restored vision refers to the regaining of vision after a period of sensory deprivation, such as cataract surgery or wearing corrective lenses. Sensory restriction refers to the temporary or permanent loss of one or more sensory modalities, such as blindness or deafness. Both restored vision and sensory restriction can result in changes to perception and adaptation to new sensory experiences.

76. Perceptual adaptation : Perceptual adaptation is the process by which the perceptual system adjusts to changes in the sensory environment, allowing us to adapt to new or unusual sensory inputs. This can involve changes in perception of sensory stimuli, such as adjusting to wearing glasses or adapting to changes in altitude.