Comparing eye movements during position tracking and identity tracking: No evidence for separate systems
- 192 Downloads
There is an ongoing debate as to whether people track multiple moving objects in a serial fashion or with a parallel mechanism. One recent study compared eye movements when observers tracked identical objects (Multiple Object Tracking—MOT task) versus when they tracked the identities of different objects (Multiple Identity Tracking—MIT task). Distinct eye-movement patterns were found and attributed to two separate tracking systems. However, the same results could be caused by differences in the stimuli viewed during tracking. In the present study, object identities in the MIT task were invisible during tracking, so observers performed MOT and MIT tasks with identical stimuli. Observer were able to track either position and identity depending on the task. There was no difference in eye movements between position tracking and identity tracking. This result suggests that, while observers can use different eye-movement strategies in MOT and MIT, it is not necessary.
KeywordsEye movements and visual attention Attention: object-based
This research was supported by Army Research Office, No. R00000000000588.
- Alvarez, G. A., & Franconeri, S. L. (2007). How many objects can you track? Evidence for a resource-limited attentive tracking mechanism. Journal of Vision, 7(13). https://doi.org/10.1167/7.13.14
- Fehd, H. M., & Seiffert, A. E. (2010). Looking at the center of the targets helps multiple object tracking. Journal of Vision, 10(4). https://doi.org/10.1167/10.4.19
- JASP Team. (2017). JASP (Version 0.8.2)[Computer software]. Retrieved from https://jasp-stats.org/
- Kleiner, M., Brainard, D. H., Pelli, D. G., Broussard, C., Wolf, T., & Niehorster, D. (2007). What’s new in Psychtoolbox-3? Perception, 36(14), 1. http://scholar.google.com.ezpprod1.hul.harvard.edu/scholar_lookup?title=What’s%20new%20in%20Psychtoolbox-3&author=M.%20Kleiner&author=D.%20Brainard&author=D.%20Pelli&author=A.%20Ingling&author=R.%20Murray&author=C.%20Broussard&journal=Perception&volume=36&issue=14&pages=1
- Oksama, L., & Hyönä, J. (2004). Is multiple object tracking carried out automatically by an early vision mechanism independent of higher-order cognition? An individual difference approach. Visual Cognition, 11. https://doi.org/10.1080/13506280344000473
- Scholl, B. J. (2009). What have we learned about attention from multiple object tracking (and vice versa). In D. Dedrick & L. Trick (Eds.), Computation, cognition, and Pylyshyn (pp. 49–78). Cambridge, MA: MIT Press.Google Scholar
- Spering, M., & Carrasco, M. (2015). Acting without seeing: Eye movements reveal visual processing without awareness. Trends in Neurosciences. https://doi.org/10.1016/j.tins.2015.02.002