A simple algorithm for the offline recalibration of eye-tracking data through best-fitting linear transformation

Vadillo, Miguel A.; Street, Chris N. H.; Beesley, Tom; Shanks, David R.

Abstract

Poor calibration and inaccurate drift correction can pose severe problems for eye-tracking experiments requiring high levels of accuracy and precision. We describe an algorithm for the offline correction of eye-tracking data. The algorithm conducts a linear transformation of the coordinates of fixations that minimizes the distance between each fixation and its closest stimulus. A simple implementation in MATLAB is also presented. We explore the performance of the correction algorithm under several conditions using simulated and real data, and show that it is particularly likely to improve data quality when many fixations are included in the fitting process.

Citation

Vadillo, M. A., Street, C. N. H., Beesley, T., & Shanks, D. R. (2015). A simple algorithm for the offline recalibration of eye-tracking data through best-fitting linear transformation. Behavior Research Methods, 47(4), 1365-1376. https://doi.org/10.3758/s13428-014-0544-1

• Journal Article Type: Article
• Online Publication Date: Jan 1, 2015
• Publication Date: 2015-12
• Deposit Date: May 30, 2023
• Journal: Behavior Research Methods
• Print ISSN: 1554-351X
• Publisher: Springer Verlag
• Peer Reviewed: Peer Reviewed
• Volume: 47
• Issue: 4
• Pages: 1365-1376
• DOI: https://doi.org/10.3758/s13428-014-0544-1
• Keywords: General Psychology; Psychology (miscellaneous); Arts and Humanities (miscellaneous); Developmental and Educational Psychology; Experimental and Cognitive Psychology