Critical Reading and Note-Taking Quiz
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Questions and Answers

What is the approximate frequency of saccades?

  • 15-20 times a second
  • 1-2 times a second
  • 3-5 times a second (correct)
  • 10-12 times a second

    • During the execution of saccadic movement, what happens to some visual processing?

  • It becomes slower
  • It is suppressed (correct)
  • It remains unaffected
  • It is enhanced

    • What is the purpose of smooth pursuit eye movements?

  • To fixate points of interest
  • To initiate saccades
  • To track an item of interest (correct)
  • To suppress visual processing

    • What did Yarbus (1967) ask participants to do during the scene viewing?

    <p>Estimate economic level of the people</p> Signup and view all the answers

    What is the top-down influence on saccades?

    <p>Eye movement strategies differed depending on the question</p> Signup and view all the answers

    Why are eye movements not random?

    <p>Top-down influence on saccades</p> Signup and view all the answers

    What does shifting the eyes achieve in terms of spatial resolution?

    <p>Shifts the fovea to gather higher resolution information</p> Signup and view all the answers

    What is the purpose of goal-directed eye movements?

    <p>Made to interact with the environment</p> Signup and view all the answers

    What is the outcome often important in goal-directed movements?

    <p>Outcome</p> Signup and view all the answers

    What is the approximate time for initiation of saccades?

    <p>~150-200ms</p> Signup and view all the answers

    During smooth pursuit eye movements, what is the velocity once at the same speed as the target?

    <p>Constant velocity</p> Signup and view all the answers

    What is the purpose of saccades?

    <p>To foveate (fixate) points of interest</p> Signup and view all the answers

    What is the alteration of the motor plan based on a discrepancy between predicted and real feedback called?

    <p>Online control</p> Signup and view all the answers

    What plays a role in reducing the ability to make online corrections to reaching movements when transcranial magnetic stimulation (TMS) is applied?

    <p>Posterior Parietal Cortex (PPC)</p> Signup and view all the answers

    Which factor significantly contributes to the precision of rapid pointing movements?

    <p>Quality of visual information</p> Signup and view all the answers

    What is used to plan a sequence of slow, guided movements?

    <p>Look Ahead Saccades</p> Signup and view all the answers

    What is part of the circuits for visual processing and deployment of saccades?

    <p>Superior Colliculus</p> Signup and view all the answers

    Which phase involves comparing the visible hand trajectory to an invisible planned trajectory?

    <p>Guidance Phase</p> Signup and view all the answers

    In which phase are reaches planned in eye-centred coordinates?

    <p>Planning Phase</p> Signup and view all the answers

    What is the alteration of the motor plan based on a discrepancy between predicted and real feedback called?

    <p>Online control</p> Signup and view all the answers

    What is used to plan a sequence of slow, guided movements?

    <p>Look Ahead Saccades</p> Signup and view all the answers

    What is part of the circuits for visual processing and deployment of saccades?

    <p>Superior Colliculus</p> Signup and view all the answers

    Which phase involves comparing the visible hand trajectory to an invisible planned trajectory?

    <p>Guidance Phase</p> Signup and view all the answers

    In which phase are reaches planned in eye-centred coordinates?

    <p>Planning Phase</p> Signup and view all the answers

    What is the approximate frequency of saccades?

    <p>3-5 times a second</p> Signup and view all the answers

    What is the purpose of smooth pursuit eye movements?

    <p>To track an item of interest</p> Signup and view all the answers

    What is the top-down influence on saccades?

    <p>Eye movement strategies differ depending on the question</p> Signup and view all the answers

    What did Yarbus (1967) ask participants to do during the scene viewing?

    <p>Free viewing</p> Signup and view all the answers

    What is the outcome often important in goal-directed movements?

    <p>Outcome</p> Signup and view all the answers

    What is the purpose of goal-directed eye movements?

    Signup and view all the answers

    What is the approximate time for initiation of saccades?

    <p>150-200ms</p> Signup and view all the answers

    What is the purpose of saccades?

    <p>To foveate points of interest</p> Signup and view all the answers

    Why are eye movements not random?

    <p>Top-down influence on saccades</p> Signup and view all the answers

    During the execution of saccadic movement, what happens to some visual processing?

    <p>It is suppressed</p> Signup and view all the answers

    What is the alteration of the motor plan based on a discrepancy between predicted and real feedback called?

    <p>Adaptation effects</p> Signup and view all the answers

    What is used to plan a sequence of slow, guided movements?

    <p>Reaches</p> Signup and view all the answers

    What is the approximate time needed to update a rapid pointing movement online?

    <p>110 - 150ms</p> Signup and view all the answers

    What factor significantly contributes to the precision of rapid pointing movements?

    <p>Visual error</p> Signup and view all the answers

    What is the purpose of 'look ahead' saccades?

    <p>To plan a sequence of slow, guided movements</p> Signup and view all the answers

    What plays a role in reducing the ability to make online corrections to reaching movements when transcranial magnetic stimulation (TMS) is applied?

    <p>Posterior Parietal Cortex</p> Signup and view all the answers

    What is the approximate distance between the first saccade and the hand during rapid pointing?

    <p>~1.5°</p> Signup and view all the answers

    What is the purpose of the superior colliculus in the context of visual processing and saccade deployment?

    <p>Selecting a target</p> Signup and view all the answers

    What is the alteration of the motor plan based on a discrepancy between predicted and real feedback called?

    <p>Online control</p> Signup and view all the answers

    What is the approximate time needed to update a slow, reaching movement online?

    <p>~110 - 150ms</p> Signup and view all the answers

    What is the primary factor limiting performance related to fatigue and energy expenditure?

    <p>Biomechanical costs</p> Signup and view all the answers

    What is the primary factor limiting performance related to compromised stereo and low light conditions?

    <p>Visual error</p> Signup and view all the answers

    What is the primary factor limiting performance related to the speed-accuracy trade-off in movements?

    <p>Fitts’s law</p> Signup and view all the answers

    What is the primary factor limiting precision in rapid pointing movements?

    <p>Visual error</p> Signup and view all the answers

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