When deciding whether to undertake eye tracking on your site it is important to consider your goals and resources as well as the capabilities and limitations of the testing method. A red circle is the area of focus, while the red line indicates the flight.Ĭapabilities and Limitations of Eye Tracking Periods of attention and then rapid movement. The movement is not unlike watching a hummingbird move between flowers. Saccade pathways trace the eye’s movement between areas of focus. Thus, a red spot over an area of your page might indicate that a participant, or group of participants, focused on this part of a page for a longer period of time. Generally, a color scale moving from blue to red indicates the duration of focus. Heat maps represent where the visitor concentrated their gaze and how long they gazed at a given point. The software generates data about these actions in the form of heat maps and saccade pathways: Webgazer.As a participant looks at a webpage, the eye tracking device focuses on the pupil of the participants eye and determines the direction and concentration of their gaze. If you don't need constant access to this data stream, you may alternatively call webgazer.getCurrentPrediction() which will give you a prediction at the moment when it is called. This method invokes a callback you provide every few milliseconds to provide the current gaze location of a user. tGazeListener() is a convenient way to access these predictions. Once webgazer.begin() has been called, WebGazer.js is ready to start giving predictions. webgazer.begin() starts the data collection that enables the predictions, so it's important to call this early on. The two most important methods on webgazer are webgazer.begin() and tGazeListener(). webgazer has methods for controlling the operation of WebGazer.js allowing us to start and stop it, add callbacks, or change out modules. Once the script is included, the webgazer object is introduced into the global namespace. To use WebGazer.js you need to add the webgazer.js file as a script in your website:īe aware that when you do local development and you might need to run locally a simple http server that supports the https protocol.
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