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Psychology Ch. 5
Sensation and Perception
41
Other
Undergraduate 1
09/21/2009

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Term
SENSATION
Definition
When sense organs recieve and respond to stimuli in our environment
Term
PERCEPTION
Definition

A two-stage process

1. First Sensation

2. Mental Organization & Interpretation

 

Personal experiences, culture, biases will effect our ultimate perception

Term
Fechner's Law
Definition
This Law states that the sensation one experiences increases as a logarithmic function of the intensity of the stimulus.
Term
Weber's Law
Definition
The ability to recognize that more or less of some experienced sensation appeared to be related to the initial magnitude of the stimulus
Term
Absolute Threshold
Definition
The smallest intensity of a stimulus that can be accurately detected 50% of the time
Term
Relative Thresholds
Definition
Differential, difference, and just noticable differences
Term
Sight
Definition
Dominant sense for most people
Term
Visual Spectrum
Definition
Wavelengths that comprise a small part of the electromagnetic spectrum that humans respond to
Term
Aqueous Humor
Definition
the chamber behind the cornea, but in front of the iris
Term
Astigmatism
Definition
Irregularity in the cornea that diffuses light
Term
Iris
Definition
Colored part of the eye
Term
Pupil
Definition
The lens is located right behind the ________.
Term
Sclerotic Coat
Definition
Tough, Fibrous, Protects the Eye, Helps Keep the shape coat
Term
Choroid Layer
Definition
Underneath Sclerotic Coat, vascular part of the eye, absorbs stray light, and prevents light from entering anywhere but cornea and lens.
Term
Rods & Cones
Definition
Name the two specialized cells in the retina
Term
Rods
Definition
Sensitive to night vision, cylindrical
Term
Cones
Definition
Responsible for color perception and sharp visual acuity
Term
Fovea
Definition
Where most cones are located
Term
Back of the eye
Definition
Where does the most distint vision take place?
Term
Blind Spot
Definition
Optic Nerve (Fibers and Gangolion Cells) leaves eye transporting info to occipital lobe. No rods or cones. What is this?
Term
Vitreous Humor
Definition
Fluid that fills the chamber of the eye
Term
Accommodation
Definition
Process in which the lens changes shape to focus at different distances from the eye
Term
Ciliary
Definition
The lense is controlled by ______ muscles.
Term
Floaters
Definition
Tiny spots that periodically float across the visual field
Term
Transduction
Definition
Process of converting energy into neutral impulses
Term
Vision
Definition
Sight
Term
Audition
Definition
Hearing
Term
Olfaction
Definition
Smell
Term
Gustation
Definition
Taste
Term
Tactile
Definition
Touch
Term
Kinesthetic
Definition
Position of the Limbs
Term
Vestibular
Definition
Balance, Body Position
Term
Noseeception
Definition
Pain
Term
Amplitude
Definition
Light intensity
Term
Wavelength
Definition
Color
Term
Optic Disk
Definition
A hole in the back of the eye connecting to the optic nerve fibers
Term
Optic Nerve
Definition
Where neural impulses carry visual information through
Term
Trichromatic Theory
Definition
The human eye has 3 types of cones (red,green,blue) and all color perception is due to the mixing of these 3 colors
Term
Opponent-Process Theory
Definition
Colors are paired and do not work with each other(red vs. green, black vs. white, blue vs. yellow)
Term
Monocular Depth Perception
Definition
Accomodation and motion parallex are important for this
Term
Binocular Depth Perception
Definition
Retinal Disparity and Convergence are important
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