1 | P a g e | © copyright 2024/2025 | Grade A+
PSY 252-Perceptual Processes-
Midterm Questions and Answer |
Latest Update 2024/2025
motor signal or image displacement signal?
~~> image displacement signal
Detecting Motion: Say you are studying in the quiet area on campus and a
person walks by you but your eyes stay stationary looking at your computer in
front of you. You're still aware that somebody did just walk by but you didn't
avert your gaze to look directly at them and follow them with your eyes as
they pass by.
What signal gets sent to your brain in this scenario?
Image displacement signal (IDS)
OR
Motor Signal/Corollary discharge signal (CDS)
Master01 | September, 2024/2025 | Latest update
, 2 | P a g e | © copyright 2024/2025 | Grade A+
~~> Image displacement signal (IDS): the image being the person passing
by is signalling a displacement. AKA something is disrupting your visual field
and what disrupting it is the guy that walks by you.
occurs when a signal is sent from the brain to move the eye muscles
motor signal or image displacement signal?
~~> Motor Signal
What happens after a motor signal is generated in your eyes that allows you
to move your eyes?
A c_________ copy of that motor signal gets sent to your brain (part of your
brain stem) and that c_______ copy of the motor signal is referred to as a
c__________ d_________ s_______ (CDS).
~~> carbon copy x2 ....
referred to as a corollary discharge signal.
Master01 | September, 2024/2025 | Latest update
, 3 | P a g e | © copyright 2024/2025 | Grade A+
Detecting Motion: Say you are studying in the quiet area on campus and a
person walks by you and you think you know them so you look at them and
start following them with your eyes as you try to determine if they are
someone you know. (AKA you keep them in the center of your visual field).
What signal(s) gets sent to your brain in this scenario?
Image displacement signal (IDS)
OR
Motor Signal/Corollary discharge signal (CDS)
~~> Motor Signal/Corollary discharge signal (CDS)
1. moving your eyes via our extra ocular eye muscles to follow the person
evokes the motor signal
2. A carbon copy of that motor signal gets sent to part of your brain stem and
that carbon copy of the motor signal is referred to as a corollary discharge
signal.
Movement perception depends on three signals:
Master01 | September, 2024/2025 | Latest update
, 4 | P a g e | © copyright 2024/2025 | Grade A+
1. I________ D___________ S________
2. M________ S________ ---> C____________ D_________ S_______
~~> Image displacement signal
motor signal/corollary discharge signal
A copy of the motor signal is referred to as c___________ d__________ s________
~~> corollary discharge signal
What neural mechanism in the brain is responsible for receiving image
displacement signals and corollary discharge signals?
C______________
~~> Comparator (perceived movement depends on the signals that are
received by the comparator).
In which situation do you NOT perceive motion?
When you comparator receives...
Master01 | September, 2024/2025 | Latest update
PSY 252-Perceptual Processes-
Midterm Questions and Answer |
Latest Update 2024/2025
motor signal or image displacement signal?
~~> image displacement signal
Detecting Motion: Say you are studying in the quiet area on campus and a
person walks by you but your eyes stay stationary looking at your computer in
front of you. You're still aware that somebody did just walk by but you didn't
avert your gaze to look directly at them and follow them with your eyes as
they pass by.
What signal gets sent to your brain in this scenario?
Image displacement signal (IDS)
OR
Motor Signal/Corollary discharge signal (CDS)
Master01 | September, 2024/2025 | Latest update
, 2 | P a g e | © copyright 2024/2025 | Grade A+
~~> Image displacement signal (IDS): the image being the person passing
by is signalling a displacement. AKA something is disrupting your visual field
and what disrupting it is the guy that walks by you.
occurs when a signal is sent from the brain to move the eye muscles
motor signal or image displacement signal?
~~> Motor Signal
What happens after a motor signal is generated in your eyes that allows you
to move your eyes?
A c_________ copy of that motor signal gets sent to your brain (part of your
brain stem) and that c_______ copy of the motor signal is referred to as a
c__________ d_________ s_______ (CDS).
~~> carbon copy x2 ....
referred to as a corollary discharge signal.
Master01 | September, 2024/2025 | Latest update
, 3 | P a g e | © copyright 2024/2025 | Grade A+
Detecting Motion: Say you are studying in the quiet area on campus and a
person walks by you and you think you know them so you look at them and
start following them with your eyes as you try to determine if they are
someone you know. (AKA you keep them in the center of your visual field).
What signal(s) gets sent to your brain in this scenario?
Image displacement signal (IDS)
OR
Motor Signal/Corollary discharge signal (CDS)
~~> Motor Signal/Corollary discharge signal (CDS)
1. moving your eyes via our extra ocular eye muscles to follow the person
evokes the motor signal
2. A carbon copy of that motor signal gets sent to part of your brain stem and
that carbon copy of the motor signal is referred to as a corollary discharge
signal.
Movement perception depends on three signals:
Master01 | September, 2024/2025 | Latest update
, 4 | P a g e | © copyright 2024/2025 | Grade A+
1. I________ D___________ S________
2. M________ S________ ---> C____________ D_________ S_______
~~> Image displacement signal
motor signal/corollary discharge signal
A copy of the motor signal is referred to as c___________ d__________ s________
~~> corollary discharge signal
What neural mechanism in the brain is responsible for receiving image
displacement signals and corollary discharge signals?
C______________
~~> Comparator (perceived movement depends on the signals that are
received by the comparator).
In which situation do you NOT perceive motion?
When you comparator receives...
Master01 | September, 2024/2025 | Latest update
