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Chapter 5
Unit 2
| Term | Definition |
|---|---|
| Sensation | Stimuli entering the brain |
| Perception | Brain's interpretation of sensation |
| Transduction | Electrical conversion from sensation to perception |
| Absolute threshold | Minimum amount of sensation required (1) in order for the brain to form an accurate perception 50% of the time |
| Just Noticeable Difference | minimum amount of sensory change required for the brain to maintain accurate perception 50% of the time (difference in volume) |
| Difference Threshold | Minimum amount of variation between identical or similar sensation to have accurate perception 50% of the time |
| Subliminal Threshold | Unconcious mind is aware, concious mind is not |
| Sensory Adaptation | Modify when needed |
| Weber's Law | Contradicts threshold, the brain's ability to determine threshold depends on the sensation |
| Signal Detection theory | Contradicts threshold, if the person is motivated to make a perception the sensation will be more likely |
| False positive | the brain thinks it forms perception, but it doesn't |
| False negative | fails to identify an actual perception |
| Gate theory | Large fiber input, small fiber input |
| Large fiber input | gate closed |
| Small fiber input | gate open |
| Primary senses | See, hear, smell, taste, touch |
| See | vision |
| Hear | audition |
| Smell | olfaction |
| Taste | Gustation |
| Touch | Somatosense |
| Secondary sense | Balance and movement |
| Balance | Vestibular |
| Movement | kinesthetic |
| Visual capture | If more than 1 of your senses is being focused on, vision is #1 |
| Light | wavelength=distance |
| Hue | color |
| Cornea | Protective covering |
| Pupil | Opening in which light enters |
| Iris | Muscle expands and contracts the pupil |
| lens | focuses light and flips the image |
| Retina | Screen in back of eye that activates neurons |
| Fovea | area of central focus |
| Cones | Retina cells activated by color (Central vision) |
| Rods | Retina cells activated by black and white (peripheral vision) |
| Optic nerve | carries signal to the brain |
| Blind spot | Missing photoreceptor cells leads to lack of vision |
| Sound | Amplitude and frequency |
| Amplitude | volume |
| Frequency | Pitch |
| Outer ear | collects the sound wave; pinna and ear canal |
| Pinna | Directs sound into the ear |
| Ear canal | carries wave to the inner ear |
| Middle ear | Eardrum and bones |
| eardrum | vibrates from the sound wave |
| Bones | transmit vibration to the oval window |
| Inner ear | Cochlea, semicircular canals, Eustacian Tube, auditory nerve |
| Cochlea | Fluid chamber lined with hair cells |
| Semicircular canals | Control balance |
| Eustacion tube | equalize pressure |
| Auditory nerve | carries signals to the brain |
Created by:
maechtlesarah
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