SENSATION AND PERCEPTION
The figure to the left illustrates one approach we can take to determine the absolute threshold
for detecting a particular sound stimulus.
1) What do we call this particular approach to measured absolute
The Paths to Extrastriate Cortex
Separate groups of
neurons in V1 and V2
send axons to two areas
of extrastriate cortex; they
are called V4 and MT/V5.
Those two areas are the
gateways to higher areas
of extrastriate cortex. V4
is the gateway to the
SENSATION & PERCEPTION LECTURES 2015
Class meets MWF at 9-9:50am in Gilman 132
Studies of sensation and perception were the first forays into experimental psychology. Those
studies continue to this day, when they enjoy healthy interactions with biological
SENSATION AND PERCEPTION
This figure shows us the distribution of Na+, K+ and organic anions (A-) inside and outside the
axon of a neuron.
1) What do neurons and all other cells have in their plasma membranes that produces the
Exam 2 questions
1) Imagine you are viewing this library scene with only
one eye. Name four cues you could use to figure out the
depth of objects in the scene.
Partial occlusion, Relative height, Familiar size,
Relative size, Texture gradients, Linear per
1) A major part of perceptual organization requires a near-instantaneous decision to assign
borders to objects rather than their background. What do we call this cognitive process?
2) What sort of depth cues can we use in a 2-D pi
The figure to the left tells an interesting story. Your center of vision processes information
from tiny places in the visual field, such as the E just above the dot at the center of the
1) When you put your center of vision on the dot, which part
1) In which population of neurons in the visual system of any mammal do we first find
neurons that respond to movement of a visual stimulus?
Retinal ganglion cells are the earliest part of the visual system to display direction
2) In the circ
We finished up the
last lecture thinking
about the sorts of
things that happen
at the borders
between parts of a
visual scene that
have us assign
those borders to one
side and not the
other. That border
Just about any visual
scene is filled with objects
of different sorts. And it is
often the case that some
objects occlude other
the plate of cookies is one
obvious example, but so
is this persons head.
Still, we do not perceive
Psychophysics is the study of the relationship between the physical energy in a
stimulus and the perceptual experience that it produces.
Measuring Perceptual Expe