principles of speed and accuracy

Question 1

speed- accuracy trade-off

Answer 1

occurs in situations where the goal is to move a limb (or other body part) as fast as possible to reach a target or intercept an object with minimal error

Question 2

fitts’ law

Answer 2

shows an inverse relationship between ‘difficulty’ of movement and speed

it describes how movement time must be traded off to maintain accuracy under different values of ID (index of difficulty)

holds true for different age groups, lower and upper limb movements and even underwater and imagined movements

continuous task

motion time is a dependent variable

no errors

movement amplitude is varied

Question 3

linear speed-accuracy trade off

Answer 3

the relationship is observed during rapid single-aiming movements

discrete task

motion time constrained

variation in end point is the dependent variable

movement amplitude is varied

Question 4

feedback hypothesis

Answer 4

states that the logarithmic trade-off occurs for movements that are controlled by feedback-based corrections

also states that linear trade-offs occurs for tasks that are entirely preprogrammed (no feedback used) like the rapid reaching task

Question 5

movement time goal hypothesis

Answer 5

states that single-aiming paradigms use controlled MTs, which encourage participants to adopt a non-corrective, rapid control strategy

Question 6

temporal speed accuracy trade-off

Answer 6

relationship relates to tasks that require anticipation and timing