Trackloss with Tobii
I'm using Open Sesame to run visual word experiments with a Tobii X2-60. I'd like to find a way to add a variable, so to register whether for each datapoint the data is "valid" or not. Basically we want to know if the subject was blinking or looking away. Looking at the tobii raw data, the tobii marks invalid data points in two ways:
the first is through the variable Validity: 0 if invalid, 1 if valid
the second is through the value it assign to X-Y eye-gaze position: -1 if invalid, other coordinates if valid
This is a link to the Opensesame file of my experiment, with all the materials and two sample output files, the raw from tobii and the log from Open Sesame.
Could anyone help to integrate "validity" into my script?