The methodology that is defined and validated during the project integrates the classical qualitative tests with the analysis of exploration eye movements.

In fact, since visual information can be acquired only when the image of the object of interest falls on the fovea, eye movements are needed to shift the gaze from one part to the other of a visual scene the subject is exploring. The visual scene, in this particular application, is represented by the computer display.

Therefore, the study of eye movements during visual exploration can tell us where the subject is looking and for how long his gaze remains on a specific part of the screen. Detailed analysis of eye movements on a text can provide rich information on both fixations and re-fixations that can be considered as quantitative indicators of the level of difficulty of the text. But of course, also the attention level of the subject must be considered, since fixation duration per se is not enough to guarantee that the subject is actually acquiring information. Therefore, other cognitive parameters are evaluated during the experimental phase of the project.

When a subject is facing an e-learning system, his exploration behaviour can influence significantly the level of learning and in return tell us what would be the best location on the interface to put important information. If a part of the screen is not explored, the information that this part contains are not acquired by the subject.