Psych study guide exam 2

Psych study guide exam 2 - Psych Study Guide SENSATION AND...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Psych Study Guide SENSATION AND PERCEPTION 1. Sensation: The conversion of energy from the environment into a pattern of response by the nervous system; the detection of stimuli 2. Perception: The interpretation of that information 3. Parts and function of the eye: - Pupil: an adjustable opening in the eye - Iris: the colored structure on the surface of the eye surrounding the pupil o Light that passes through the eye passes through a layer of vitreous humor (jellylike substance) to strike the retina - Retina: A layer of visual receptors covering the back surface of the eyeball - Cornea: A rigid transparent structure on the outside of the eyeball - Lens: Just below the cornea: can bend and vary in thickness to allow for accommodation of objects at different distances - Fovea: Central area of the human retina; adapted for highly detailed vision. Greatest density of receptors 4. Receptors and functions of receptors - Located in the retina, in the back of the eyeball; very sensitive and very specialized - Cones: Adapted for color vision, daytime vision. Only 5% of total receptors, but far more axonal connections to brain: send much more information. The fovea is all cones - Rods: Adapted for vision in dim light – not color 5. Parts of the ear - Sound waves hit eardrum which cause it to vibrate - Eardrum connects to 3 tiny bones: hammer, anvil, and stirrup - Stirrup vibrates last, and transfers vibrations to the cochlea o Contain fluid filled canals o Also contain receptors for hearing, which are hair cells - These hair cells connect to neurons which transmit signals to the brain. 6. How sound is defined - Ear is technically known as pinna - Mammalian eat converts sound waves into mechanical displacements along a row of receptor cells - Sound waves are vibrations of air or another medium - Frequency: the number of cycles (vibrations) a sound wave goes through in a second (hertz/Hz) - Loudness: amplitude of sound waves: intensity - Adult humans hear sound waves from 15Hz to 15000Hz - Lower frequencies simply vibrate hair cells, while higher frequencies use volleys; group of hair cells respond. Highest frequencies only vibrate hair cells at a certain place (very highest, stirrup end.) Called Place Principle. - We detect where sounds are coming from simply by calculating difference in time to each ear 7. Types and cause of deafness - Conduction deafness: bones connected to the eardrum fail to transmit sound waves properly to the cochlea. Can be repaired surgically
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
- Nerve deafness: Diseases, heredity, exposure to loud noises destroy either cochlea or efferent neurons. Cannot be surgically repaired. Hearing aids help COGNITION AND LANGUAGE 1. Differences between attentive and pre attentive processes - Nude guy at a party vs. nude guy at a nudist beach: context - Very easy to spot the nude guy at a party: pre attentive process - Find a specific nude guy at the nudist beach: much more difficult – requires attention: attentive process (where’s waldo) 2. Algorithms and heuristics
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 7

Psych study guide exam 2 - Psych Study Guide SENSATION AND...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online