Eye tracking-based evaluation of accessible and usable interactive systems: tool set of guidelines and methodological issues

This paper describes some fundamentals and challenges in using eye tracking for the assessment of usability and accessibility in the fields in Human–Computer Interaction and Educational Computing. This technique has great potential since it allows considering human factors and individual differences in these areas. This non-invasive method, of physiological nature, allows to know, in an objective way, the visual behavior of the users when facing a user interface or educational material, allowing to infer conclusions related to psychological processes, such as attention or cognitive load. The purpose of this work is to propose a tool set of guidelines and measures, as well as a methodological approach, to be used in eye tracking assessments. This proposal is based on and validated by the authors’ previous experience and results in the application of this technique.