Chapter 4 Key Terms Flashcards
1
Q
Absolute Threshold
A
the minimum level of energy required for a stimulus outside our body to be detected by our internal senses
2
Q
Cones
A
the photoreceptors
providing clear vision
in colour; they work in
bright light
3
Q
Depth Cues
A
the ability to accurately judge three-dimensional space and distance, using cues in the environment
4
Q
Feature Detectors
A
cells in the optic nerve that individually respond to lines of a certain length, angle or direction to break up an image for visual perception
5
Q
Interpretation
A
stimulus is given meaning in the brain based on our past experiences, motives, values and context
6
Q
Light Energy
A
the visible part of
the electromagnetic
spectrum
7
Q
Optic Nerve
A
the two tracts of neurons that transmit visual information from the eyes to the occipital lobes of the brain
8
Q
Organisation
A
sensory information
reaches the brain and
is reorganised so we
can make sense of it
9
Q
Perception
A
the process whereby
the brain organises
and interprets
sensory information
10
Q
Photoreceptors
A
a layer of specialised nerve cells that detects visual stimuli; they make up the retina located at the back of the eye and convert (transduce) visual light energy (electromagnetic radiation or light waves within our visual spectrum) into electrochemical energy (nerve impulses)
11
Q
Reception
A
stimulus energy is
collected by the
sense organ
12
Q
Receptive Field
A
a particular region of
the visual space
13
Q
Retinal Ganglion Cells
A
a type of neuron that is located near the surface of the retina; visual information from the photoreceptors is received by the retinal ganglion cells
14
Q
Rods
A
the photoreceptors providing peripheral vision in black and white; they work in dim light
15
Q
Selection
A
the process of selecting the important sensory information on which to focus attention from the millions of stimuli we receive
16
Q
Sensation
A
the process whereby our sensory organs or receptors receive information about the environment and transmit it to the brain
17
Q
Transduction
A
stimulus energy is converted by the receptor cells into electrochemical nerve impulses
18
Q
Transmission
A
the sending of neural signals to the primary sensory cortex where specialised receptor cells respond as the process of perception begins
19
Q
Visual Acuity
A
the clarity or
sharpness of vision
20
Q
What are the steps in the process of Visual Perception?
A
Reception, Transduction, Transmission, Selection, Organisation, Interpretation
