Synchronize screen stimuli with eye tracking data
StimTracker for Tobii TX300 Eye Tracker provides a reliable and accurate solution to synchronize screen stimuli (e.g. images shown in Tobii Studio) and eye tracking data from a Tobii TX300 Eye Tracker. Screen stimuli and eye tracking data are synchronized down to an average timing accuracy of 1.7 msec.
Independent of delays in operating systems, graphic cards or pixel refresh algorithms, pixel changes on the screen are detected by a light sensor and sent by the StimTracker to the eye tracker as event markers. Stimuli changes can then be accessed by users of Tobii Studio 3.1 or higher directly in their eye tracking data or exported to other analysis programs. Alternatively, other stimuli presentation or eye tracking recording software that can access Tobii TX300 Eye Tracker through Tobii Analytics SDK 3.0 can be used.
The exceptional timing accuracy benefits studies that require high temporal resolution, such as reaction time tests and subliminal single-frame stimuli tests.
Synchronize screen stimuli and eye tracking data with physiological data
StimTracker for Tobii TX300 Eye Tracker also provides a versatile solution to synchronize screen stimuli and eye tracking data with physiological data through connectivity to a range of external EEG or other biometric data collection systems. Screen stimuli and EEG data can be synchronized with an estimated timing accuracy of approximately 1/EEG frame rate (=1msec for 1kHz EEG system). The accuracy of the synchronization between screen stimuli and eye tracking data depends on the sampling rate of the Tobii TX300 Eye Tracker (3.33 msec for 300 Hz).
Researchers can then compare eye tracking data sync signals and EEG or other biometric data sync signals in post analyses.
The exceptional timing accuracy enables researchers to know exactly where someone was looking when certain effects in the human body occurred. Saccades, larger microsaccades and blinks can be detected and, from that information, artifacts in the EEG or other data can be corrected.
Versatile through numerous synchronization options
StimTracker for Tobii TX300 Eye Tracker is compatible with, and prepared to connect to, the following EEG or other biometric data collection systems (through Cedrus-manufactured adapter boards):
- ADInstruments’ PowerLab
- ANT Neuro’s ASA-Lab
- Biopac’s MP35/MP36
- Biopac’s STP100C
- BioSemi’s ActiveTwo
- Brain Products’ USB2/BrainAmp
- Soon ready: Adapter cable for EGI
StimTracker for Tobii TX300 Eye Tracker can also connect to a PC parallel port, thereby to PC-based recording systems such as those manufactured by MindWare Technologies. Further synchronization options can be investigated at www.cedrus.com/support/stimtracker.
The many possibilities to connect to external recording systems provides a versatile solution that allows researchers to synchronize eye tracking data with a broad spectrum of other data types, including EEG, NIRS, skin conductance, motion detection, respiration rate, and heart rate, light, and sound.
> StimTracker for Tobii TX300 Eye Tracker Features