The eye-tracking process is based primarily on the hardware from Tobii Pro and the experiment software z-Tree, which can be used to control the trials in the WISO Research Lab.
This is a screen-based eye tracker that records the line of sight at 60 Hz. The natural behavior of the test subjects is taken into account; they can sit at a comfortable distance from the screen and move their heads freely. This produces an experimental environment free of distractions that encourages test subjects to act naturally. Quick or extensive movements can also be compensated for without recalibration.
Tobii Pro Studio software allows the eye-tracker data to be analyzed and visualized, and supports the entire research process, from design and data collection to interpretation and presentation. Large quantities of data can also be processed. Tobii Pro Studio is available in a special version that can be calibrated externally and enables central control of the laboratory with multiple eye-trackers.
Eye tracking is completely integrated into the z-Tree experiment software in the WISO Research Lab. The z-Tree client enables the focus of attention data to be collected without additional effort, analogous to the usual way of working during experiments. The staged structure of the z-Tree experiment is applied to the eye-tracking process by setting time marks during the continuous tracking process. In z-Tree, these markers are set before and after a screen viewed by the test subjects. This makes it possible to record the relevant time periods automatically during the evaluation using the markers, even when individual test subjects take different amounts of time.
As in z-Tree, the newly developed software Hawkeye enables all experimental computers and the associated eye tracking to be monitored simultaneously and evaluated collectively. A remote control at the experimenter's workstation makes it possible to control all 30 test stations. This allows for the alignment, calibration, and management of the test subjects and z-Tree, via a user interface.