The aims of this presentation is to describe a new device for studying ocular movements while writing and to discuss the interest of data-mining to analyze data. The ‘Eye and Pen’ device makes a synchronous recording of handwriting and eye movements during written composition. It complements existing on-line methods by providing a fine-grained description of the visual information fixated during pauses as well as during the actual writing act. The high sampling level potentially makes it possible to investigate not just discrete data (pauses, fixations) but continuous data, too (acceleration and deceleration of pen and eye movements). It thus becomes possible to regard eye and graphomotor data and their relations as a complex signal which can only be studied using multivariate and data-mining methods to extract previously-unknown behaviors and eye/pen patterns. After a description of the Eye and Pen device and the structure of data, results from deductive investigations will be provided as an example of the classical methodology in cognitive psychology. In the second part of the presentation, the use of data-mining techniques will be stressed as an opportunity to bring up unknown phenomenon.
Group for Research in Decision Analysis