Kin 3513 Final Test Questions with
Solved Solutions (2025-2026) Revised
Update.
Fitt's law is the relationship between_____ - Answer speed, amplitude & resulting accuracy
fitt's law starts with the principles of ___ movements and proceeds to more _____ movement -
Answer simple; complex
there are _____ & _____ relationships between speed and accuracy - Answer logarithmic &
linear
T/F: when you do things quickly, they are more accurate - Answer FALSE
when you do things quickly, they are LESS accurate
speed-accuracy trade-off is the relationship between _____ - Answer timing accuracy and
movement time
when speed is emphasized, accuracy is _____ - Answer reduced
(i.e. tapping test)
Paul fitts showed we could _____ predict movement time for speed - accuracy skills - Answer
mathematically
For understanding Fitts law, the most relevant parameters are ____ - Answer target distance
& width
in fitts law, the index of difficulty is linearly related to ____ - Answer movement time (MT)
Fitts' Law states that MT is constant whenever the ratio of the _____ to _____ remains constant
- Answer movement amplitude (A) to target width (W)
Fitts law:
,Log2(2A/W) is referred to as the - Answer index of difficulty
fitts law
MT (movement time) is _____ related to the ID (index of difficulty) - Answer linerally
(also linearly related to the amplitude of the target - F)
What were two of the fitts task - Answer disc-transfer & pin transfer task (disc: transfer
plastic washers from one pin to another. for both of these, target size is operationalized as the
difference between sizes of the object and the target. For example, in the pin-transfer task, a
large hole only represents an easy ID if the pin being inserted is relatively narrow)
fitts law holds true for - Answer •Different environmental conditions (•Underwater vs. in
space)
•Different types of people (•Children, older adults, individuals with neurological impairments)
•Different effectors (Hand-held, foot-held)
Movement speed in different Activities of Daily Living
fitts Law predicts movement time (MT) motor skills such as: - Answer •Dart throwing
•Peg-board manipulation task
•Used in physical rehab assessment and training
•Reaching and grasping containers of different sizes
•Moving a cursor on a computer screen
Fitts' Law in Everyday Actions example: - Answer -Keyboards (cell phones/computers) &
calculators: some keys are smaller/larger than others
•Ex. Space bar/shift bar/enter
Larger keys = faster movements --> low precision & accuracy
MT increases as the _______ decreases. - Answer target width (W)
T/F: fitts law
very long movements to wide targets require about the same time as very short movements to
,in Speed-accuracy Skills, predominately Open-loop control, occurs when - Answer Initial
movement instructions are sufficient to move limb to the vicinity of the target
in Speed-accuracy Skills, task becomes Closed-loop control towards the end when - Answer
Feedback from vision and proprioception needed at end of movement to ensure hitting target
accurately/you are honing into the target.
fitts law describes: - Answer the effects of target distance and size on Movement Time (MT)
when errors are kept at a constant rate.
Linear Speed Accuracy Trade Off describe - Answer the effects of MT and distance on how
errors are made
Effects of MT & Distance are studied by observing ____ - Answer aiming movements
what movements are less than 200 ms - Answer Amplitude Manipulation & Movement Time
manipulation
Amplitude Manipulation - Answer Endpoint inaccuracy increases with movement amplitude
for each of the different MT conditions.
Movement Time manipulation - Answer Inaccuracy of the movement increases as the MT is
reduced at each amplitude
Effects on movement distance and MT on width suggest that open-loop processes are also
subject to_______ - Answer speed-accuracy trade-off
Decreases in MT's are due to: - Answer 1. less time to process visual feedback
2. there are movements too brief to have any feedback modulations at all.
The amount of movement error is linearly related to __________ - Answer movement's
average velocity
, - movement increases as the target width decreases
- MT decreases as movement amplitude increases
- the principles of fitts law are valid for a variety of body parts used
- MT increases as the aiming accuracy requirement requirement increases - Answer MT
decreases as movement amplitude increases
Schmidt's Law - Answer Aiming errors are about the same for various combinations of
movement amplitude and MT that have a constant ratio (i.e. constant average velocity)
increases in movement amplitude and decreases in MT can be traded off with each other to
maintain __________ - Answer movement accuracy in rapid tasks.
schmidts law, fitts law & linear speed accuracy trade-off are all relationships between ______ -
Answer speed, accuracy & timing
Why do very rapid movements, that obtain little or no feedback processing and corrections,
produce more errors as the movement distance increases or MT decreases ? - Answer Motor
Program;
•responsible for determining what and how to coordinate limbs to move
•how much force needs to be produced in the participating muscle(s).
Production of a movement with same force will result in _________ amounts of force on every
concurrent trial. - Answer inconsistent
*also known as noisy processes*
T/F
forces produced in the contraction are not exactly intended by the motor program - Answer
TRUE
in Noisy Processes, when contraction forces increase - Answer more variability in these
forces & noisy processes becomes larger as well (increase to 70% of participants maximum)
T/F
only a few muscles must contract wit the right amount of force, in coordination with each other
Solved Solutions (2025-2026) Revised
Update.
Fitt's law is the relationship between_____ - Answer speed, amplitude & resulting accuracy
fitt's law starts with the principles of ___ movements and proceeds to more _____ movement -
Answer simple; complex
there are _____ & _____ relationships between speed and accuracy - Answer logarithmic &
linear
T/F: when you do things quickly, they are more accurate - Answer FALSE
when you do things quickly, they are LESS accurate
speed-accuracy trade-off is the relationship between _____ - Answer timing accuracy and
movement time
when speed is emphasized, accuracy is _____ - Answer reduced
(i.e. tapping test)
Paul fitts showed we could _____ predict movement time for speed - accuracy skills - Answer
mathematically
For understanding Fitts law, the most relevant parameters are ____ - Answer target distance
& width
in fitts law, the index of difficulty is linearly related to ____ - Answer movement time (MT)
Fitts' Law states that MT is constant whenever the ratio of the _____ to _____ remains constant
- Answer movement amplitude (A) to target width (W)
Fitts law:
,Log2(2A/W) is referred to as the - Answer index of difficulty
fitts law
MT (movement time) is _____ related to the ID (index of difficulty) - Answer linerally
(also linearly related to the amplitude of the target - F)
What were two of the fitts task - Answer disc-transfer & pin transfer task (disc: transfer
plastic washers from one pin to another. for both of these, target size is operationalized as the
difference between sizes of the object and the target. For example, in the pin-transfer task, a
large hole only represents an easy ID if the pin being inserted is relatively narrow)
fitts law holds true for - Answer •Different environmental conditions (•Underwater vs. in
space)
•Different types of people (•Children, older adults, individuals with neurological impairments)
•Different effectors (Hand-held, foot-held)
Movement speed in different Activities of Daily Living
fitts Law predicts movement time (MT) motor skills such as: - Answer •Dart throwing
•Peg-board manipulation task
•Used in physical rehab assessment and training
•Reaching and grasping containers of different sizes
•Moving a cursor on a computer screen
Fitts' Law in Everyday Actions example: - Answer -Keyboards (cell phones/computers) &
calculators: some keys are smaller/larger than others
•Ex. Space bar/shift bar/enter
Larger keys = faster movements --> low precision & accuracy
MT increases as the _______ decreases. - Answer target width (W)
T/F: fitts law
very long movements to wide targets require about the same time as very short movements to
,in Speed-accuracy Skills, predominately Open-loop control, occurs when - Answer Initial
movement instructions are sufficient to move limb to the vicinity of the target
in Speed-accuracy Skills, task becomes Closed-loop control towards the end when - Answer
Feedback from vision and proprioception needed at end of movement to ensure hitting target
accurately/you are honing into the target.
fitts law describes: - Answer the effects of target distance and size on Movement Time (MT)
when errors are kept at a constant rate.
Linear Speed Accuracy Trade Off describe - Answer the effects of MT and distance on how
errors are made
Effects of MT & Distance are studied by observing ____ - Answer aiming movements
what movements are less than 200 ms - Answer Amplitude Manipulation & Movement Time
manipulation
Amplitude Manipulation - Answer Endpoint inaccuracy increases with movement amplitude
for each of the different MT conditions.
Movement Time manipulation - Answer Inaccuracy of the movement increases as the MT is
reduced at each amplitude
Effects on movement distance and MT on width suggest that open-loop processes are also
subject to_______ - Answer speed-accuracy trade-off
Decreases in MT's are due to: - Answer 1. less time to process visual feedback
2. there are movements too brief to have any feedback modulations at all.
The amount of movement error is linearly related to __________ - Answer movement's
average velocity
, - movement increases as the target width decreases
- MT decreases as movement amplitude increases
- the principles of fitts law are valid for a variety of body parts used
- MT increases as the aiming accuracy requirement requirement increases - Answer MT
decreases as movement amplitude increases
Schmidt's Law - Answer Aiming errors are about the same for various combinations of
movement amplitude and MT that have a constant ratio (i.e. constant average velocity)
increases in movement amplitude and decreases in MT can be traded off with each other to
maintain __________ - Answer movement accuracy in rapid tasks.
schmidts law, fitts law & linear speed accuracy trade-off are all relationships between ______ -
Answer speed, accuracy & timing
Why do very rapid movements, that obtain little or no feedback processing and corrections,
produce more errors as the movement distance increases or MT decreases ? - Answer Motor
Program;
•responsible for determining what and how to coordinate limbs to move
•how much force needs to be produced in the participating muscle(s).
Production of a movement with same force will result in _________ amounts of force on every
concurrent trial. - Answer inconsistent
*also known as noisy processes*
T/F
forces produced in the contraction are not exactly intended by the motor program - Answer
TRUE
in Noisy Processes, when contraction forces increase - Answer more variability in these
forces & noisy processes becomes larger as well (increase to 70% of participants maximum)
T/F
only a few muscles must contract wit the right amount of force, in coordination with each other
