Hi Sanghee,
The “times” column reports how many milliseconds elapsed between when the EyeTracker element was started, and when the data in the corresponding row were collected (which is why the value in that cell is 0 on the very first row below the header: the first eye-tracking data were collected right when the tracker was started)
The columns starting with _ are named after the elements you added to the EyeTracker element, and report 0 or 1, depending on whether the (X,Y) coordinates that were estimated by the tracker fell within the boundaries of the corresponding element at that time point
The “trial” column reports the PennController trial’s ID number. If you only have PennController trials in your experiment, it will correspond to the 4th column in your results file (“Item number”) — more generally, it matches the value of the 9th column (PennElementName) for the rows in the results file that report “_Trial_,Start” or “_Trial_,End”
Jeremy