STUDY GUIDE FOR PSYCH EXAM 2

STUDY GUIDE FOR PSYCH EXAM 2 - General Psychology Fall 2009...

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

View Full Document Right Arrow Icon
General Psychology Fall 2009 EXAM 2 -- STUDY GUIDE: Part One (of Two CHAPTER 4 SENSATION AND PERCEPTION I. Sensation B. Principles of sensory experience (selectivity; sensitivity to change) C. Sensory adaptation (what is it? why is it important for survival?) II. Vision (what type of stimulus energy is involved?) A. Visual system 1. basic parts of the eye (cornea, iris, pupil, lens, rods & cones, bipolar cells, ganglion cells) -Iris (gives color), controls how much light goes into the eye/size of pupil - Pupil is the opening in the center of the iris that helps regulate the amount of light passing into the rear chamber of the eye Lens is a transparent eye structure that focuses the light rays falling on the retina Cones are specialized visual receptors that play a key role in daylight vision and color vision - Cornea important for protection of the eye and provides most of the focusing power of the eye - Sclera is the white part of the eye - Conjunctiva- layer or blood vessels that covers the sclera - Rods are specialized visual receptors that play a key role in night vision and peripheral vision b. what causes nearsightedness? fardisghtedness? Nearsightedness- focus of light from distant objects falls a little short of retina Problem occurs when cornea or lens bends light too much/eyeball is too long Far sighted is opposite, eye is not strong enough Focus of light from close objects fall behind the retina/eyeball is too short 2. retina- Retina- neural tissue lining the inside back surface of the eye, it absorbs light, processes images, and sends visual information to the brain a. rods & cones (which are more numerous? how do they differ in function? in location?) -Retina contains two types of receptors a.i. Rods a.i.1. Specialized visual receptors that play a key role in night vision and peripheral vision
Background image of page 1

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

View Full DocumentRight Arrow Icon
a.i.2. Want to see image better in dark, stare slightly above or below because moves image from cone filled area into rod dominated area, which requires less light a.i.3. Located just outside the fovea and decreases denisty toward the periphery of the retina a.i.3.a. Located innermost layer of the retina a.i.3.b. Only ten percent of light actually reaches a.ii. Cones a.ii.1. Specialized visual receptors that play a key role in daylight vision and color vision a.ii.1.a. Handles most of day vision a.ii.1.b. Play major role in perception of color a.ii.1.c. Provides more sharpness and precise vision a.ii.1.d. Want shart focus, move your eyes to center the object in the fovea a.ii.2. Cones are concentrated most heavily in the center of the retina and quickly fall off in density towards its sides a.ii.2.a. Located innermost layer of the retina a.ii.2.b. Only ten percent of light actually reaches a.iii. Rods outnumber cones by a lot (100-120 million rods in comparison to 20-25 million b. dark adaptation (why can you see better in a dark room after about 10 minutes?) Dark adapation- the process in which the eyes become more sensitive to light in low
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.

This note was uploaded on 11/16/2011 for the course PSYCHOLOGY 101 taught by Professor Michaelleyton during the Fall '08 term at Rutgers.

Page1 / 9

STUDY GUIDE FOR PSYCH EXAM 2 - General Psychology Fall 2009...

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