eyetracker element

Attributes

<eyeTracker>
/ aoiDurationThreshold = maxfixationtime
/ calibrationMode = mode
/ calibrationPointColor = colorname
/ calibrationStimulus = stimulus
/ calibrationTargetColor = colorname
/ columns = (eyecolumn, eyecolumn, eyecolumn, property, property, property)
/ frameRate = framerate
/ ipAddress = ipaddress
/ plugin = eyetracker
/ screenColor = colorname
/ screenColor = expression
/ encrypt = boolean(password)
/ file = path
/ filter = { script }
/ labels = (label, label, label, ...)
/ password = string
/ separateFiles = boolean
/ userId = string
</eyeTracker>

Properties

Functions

None.

Remarks

The eyetracker requires a custom plugin for a given make of eyetracker that can be purchased separately from Inquisit Lab. To date, we have released a plugin for Tobii eyetrackers, although plugins for other eyetrackers may be released in the future. (Note - Inquisit can send markers to any eye tracker that accepts parallel or serial port input without the use of this element and associated plugin.)

To initialize the plugin and enable access to gaze point data, simply specify the eye tracker element and set the plugin attribute to the name of the plugin (e.g., "tobii").

Each plugin may optionally support additional proprietary attributes specific to the eyetracker (see plugin-specific documentation). The eyetracker element supports a set of properties common to all plugins. These properties report gaze point and pupil size along with basic statistics on those data. The properties can be stored in the data file or used to dynamically determine experimental flow.

Currently available eye tracker plugins:

* Inquisit 7 Tobii Plugin

* SR Research Eyelink Plugin

Examples

The following defines an eyetracker element that communicates with a Tobii eyetracker. The eyetracker element has properties that enable programmatic access to gaze data for use in gaze-contingent tasks.

<eyetracker>
/ plugin = "tobii"
</eyetracker>