Eye Tracking to Evaluate the User eXperience (UX): Literature Review

User eXperience (UX) shapes the way how users interact with products, systems, and services therefore it is necessary to be able to accurately evaluate how this interaction behaves. We propose a review of some of the most relevant articles and how their discoveries impact this line of research including a list of metrics that jointly translate the raw variables captured by an eye tracker to results related to aspects of the UX model of a product. It is also discussed how state of the art Passive Eye tracking Technologies (PET) offer a cheap and simple way of implementing these experiments within the budget limit constraints, reviewing their pros and cons for future investigations that wish to apply this technology for evaluating UX and even carry out massive Eye Tracking studies with experiments done remotely with the help of cloud technology.