Knowledge Base

Eye Tracking Performance and Correlation

Gaze results can help track what captures the participant's attention.

Correlation within different categories in two tasks between fixation duration of Tobii Nano eye tracker and EyeReader output was observed. The chosen category recorded approximately 2.0 seconds on not chosen categories, versus 11.1 seconds and 2.6 seconds for the eye tracker.

The slightly lower estimates in EyeReader are likely due to a slightly higher percentage of failed eye localizations. In addition, the total fixation duration for each category indicated strong correlation between the two systems (Mean r = 0.91).

Research Applications and Suitability

The results show that eye tracking via the webcam can be a useful and easily applicable research tool. Under good conditions, varying individual and screen characteristics do not cause large differences in performance. Generally speaking, there is often a trade-off between ecological validity and measurement precision.

If high precision is required, a lab setting is more appropriate where participants can also put their head in a headrest and have long calibration sessions. EyeReader is very suitable for researching realistic behaviors where you expect clear discernible effects.

You can use EyeReader in a flexible and mobile lab environment or within the FaceReader Online platform for online testing. If you are already a FaceReader Online user, make sure you are using FaceReader 9. When you open a project, click on the tab Details and make sure version 9 is selected as analysis engine for the participants' recordings. You can then turn gaze tracking on in your experiment design.

Getting Started with EyeReader

Visit www.facereader-online.com for more information and sample studies. To start using FaceReader Online or for more information on how to integrate EyeReader in a lab environment or other tool, please contact Noldus.

Contact Information

International Headquarters

• Company: Noldus Information Technology bv
• Location: Wageningen, The Netherlands
• Phone: +31-317-473300
• Fax: +31-317-424496
• Email: [email protected]

North American Headquarters

• Company: Noldus Information Technology Inc.
• Location: Leesburg, VA, USA
• Phone: +1-703-771-0440
• Toll-free: 1-800-355-9541
• Fax: +1-703-771-0441
• Email: [email protected]

Global Representation

Noldus is also represented by a worldwide network of distributors and regional offices. Visit the Noldus website for contact information.

Legal Notices

Due to our policy of continuous product improvement, information in this document is subject to change without notice. The Observer is a registered trademark of Noldus Information Technology bv. FaceReader is a trademark of Vicarious Perception Technologies BV. © 2022 Noldus Information Technology bv. All rights reserved.

Source: EthoVision XT 18 - THC - Trial and Hardware Control, Noldus Information Technology