Eye tracking in human interaction: Possibilities and limitations
Niilo V. Valtakari, Ignace T. C. Hooge, Charlotte Viktorsson, Pär Nyström, Terje Falck‐Ytter, Roy S. Hessels
Abstract
There is a long history of interest in looking behavior during human interaction. With the advance of (wearable) video-based eye trackers, it has become possible to measure gaze during many different interactions. We outline the different types of eye-tracking setups that currently exist to investigate gaze during interaction. The setups differ mainly with regard to the nature of the eye-tracking signal (head- or world-centered) and the freedom of movement allowed for the participants. These features place constraints on the research questions that can be answered about human interaction. We end with a decision tree to help researchers judge the appropriateness of specific setups.