Eye tracking as the name suggests involves tracking of eye-movements. It is a non-invasive, sensitive tool that quantifies and measures eye-movements to describe an individuals' cognitive state. An eye-movement between two fixation points is called a saccade, which is one of the fastest motor movements in our body. By observing the profiles of these eye movements, scientists can better understand neural deficits in patients with cognitive impairments.

In this video, we will first look at an overview of different eye movements that eye tracking can capture and the type of data that can be collected. Then, the basic setup and experimental design are reviewed, including different types of eye trackers and details to optimize the eye tracking equipment. Finally, we will take a look at a few specific experiments utilizing eye tracking as a tool to study cognition.