What are smooth pursuit eye movements?
Smooth pursuit movements are much slower tracking movements of the eyes designed to keep a moving stimulus on the fovea. Such movements are under voluntary control in the sense that the observer can choose whether or not to track a moving stimulus (Figure 20.5).
What causes lack of smooth pursuit?
Drugs and Alcohol Drugs causing lack of smooth pursuit include depressants, some inhalants, and dissociative anesthetics (such as phencyclidine or ketamine).
Why is smooth pursuit important?
Smooth-pursuit eye movements allow primates to track moving objects. Efficient pursuit requires appropriate target selection and predictive compensation for inherent processing delays.
Is eye tracking a research method?
Eye tracking allows researchers to study the movements of a participant’s eyes during a range of activities. This gives insight into the cognitive processes underlying a wide variety of human behavior and can reveal things such as learning patters and social interaction methods.
How do you check pursuits?
“You will see a green dot on the screen. The dot will move from one side of the screen to the other in a smooth, predictable motion. Your task is to follow the dot with your eyes while keeping your eyes precisely on the dot. Try not to move your head and try not to get ‘ahead of’ or ‘behind’ the target.”
Does there appear to be a link between smooth eye pursuit and schizophrenia?
A wealth of evidence, including a recent preliminary report citing linkage of pursuit abnormality to chromosome 6p21 in relatives of schizophrenic patients, suggests that the smooth pursuit deficit marks the genetic liability to schizophrenia (Arolt et al., 1996; Clementz & Sweeney, 1990; Levy, Holzman, Matthysse, & …
How is smooth vision achieved?
The superior colliculus is responsible for moving the eyes in short jumps, called saccades. Saccades allow the brain to perceive a smooth scan by stitching together a series of relatively still images.
Is eye tracking qualitative or quantitative?
In the context of research methods, eye tracking is used for both qualitative and quantitative research.
What are two benefits of using eye tracking software?
Eye-tracking technology helps observe and measure eye movements, pupil dilation, point of gaze, and blinking to see where subjects of a study focus their visual attention, what they engage with, and what they ignore.
How do you test visual pursuits?
How would you describe visual pursuits?
Visual Pursuits refers to the coordination of eye movement as eyes move while reading or following an object. Each eye is controlled by three sets of two muscles that work by one muscle opposing the pull of its antagonist muscle.