Hi Everyone. For my research project im analysing video of simulationstraining in anaesthesiology captured with pupil invisible. Im just getting started and have no experience with eyetracking. My main question is how screen interaction time differs between test subjects exposed to different screen configurations. how would I idealy extract that info? And also in one setting test subjects also had to use and physicaly interact with the screen, how would I exclude these interaction times, from the cumulative dwell time on the screen/ AOI. Any infos, links to other threads are much appreciated. thx!
@user-aadc60 Have you already made all your recordings? You could use the surface tracker (Pupil Core) or marker mapper (Pupil Invisible) to track when your subjects are looking at the screen and use that to measure screen interaction time. https://docs.pupil-labs.com/core/software/pupil-player/#surface-tracker
Yeah recordings all have been made. With the surface markers all being the same, i assume i can copy/paste surface definitions between files or do i have to define them each for their own? And to extract the cumulative dwell time on a surface I analyse the export data? If I want to exclude certain video parts, where participants use the monitor/surface that shouldnt count for my dwell time thats rather a problem i have to figure out in Excel. Or is there an option within Pupil Player? I.e. having an option to trim the Video feed into different sections....
@user-aadc60 Yes, if the markers are the same (not only same ID but also exact same spatial relationship like when the subjects have all been recorded in the same environment), you can copy and paste the surface definition.
Yes, to calculate the dwell time you need to analyze the exported data. There is a column that tells you if the gaze is on the AOI or not. You could for example aggregate over that.
In Pupil Player you can set the trim marks of the timeline to specify which part of the recording you want to export. This way you could cut the recording into according sections of interest.
is it possible that one folder only allows for one file for "surface_definitions"? Do I have to replace previous ones when copying or can there be multiple, and if so how do I make sure it loads the correct one? what about naming these surface definitions, do they have to be in format of surface_definitions_v01, v02,...? or does it allow to have different names for different surface presets I have to use like surface_defintions_ABC and _XYZ? thx alot for your help!
@user-aadc60 There can only be one file, which contains all surface definitions. It is not immediately possible to mix surface definitions originating together in a third recording.