Laura Bishop
Researcher, RITMO, Department of Musicology, University of Oslo.
Research interests: music ensemble performance, attention and mental effort, music and motion, collaborative creativity.
Location Oslo, Norway
Activity
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Laura Bishop replied to Doug Karo
@DougKaro Yes, for sure! We do share our data and processing scripts whenever possible, and this is becoming more standard practice in the community.
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Laura Bishop replied to Doug Karo
@DougKaro, thanks for the great comment. I agree that there can be a problematic degree of subjectivity in pre-processing of pupil data. If I'm working with data that can be pre-processed using built-in functions in some eye-tracking software, then that's what I use---though these functions are never perfect, so the data still need to be checked. (And as Scott...
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Laura Bishop replied to Guilherme Delmolin
Programming skills are definitely useful when it comes to data analysis, for both motion capture and eye-tracking, and especially if you want to do your own pre-processing. Python and R are good for this. Languages like Python are also useful for interfacing with recording software. We use a Python script to synchronize our mobile eye-tracking and motion...
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Yes, squinting affects pupil size and can disrupt tracking of the eye just as blinks do. Generally, a lot of squinting would make the data pretty unusable.
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Glasses usually cause problems for mobile eye trackers, since they introduce glare and interfere with the detection of the pupil, so contact lenses are preferred in that case.
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Blinking causes brief disruptions to eye-tracking, and it can take some tens of milliseconds to re-establish tracking after the blink. This is unavoidable during recordings that are more than a few seconds long, but if trials are very short, then trials with blinks will normally be discarded.
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Interesting question! For some eye-trackers, cataracts might cause problems for pupil detection. However, there are some eye movement & pupillometry studies with people who have cataracts, so at least some eye-trackers can cope with it.
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Laura Bishop replied to Doug Karo
Sure, the frame could be fitted with a device to detect movements, or the participant could wear an accelerometer so that the experimenter doesn't have to monitor them. The newest stationary eye-trackers account increasingly well for head motion, so that re-calibration is not needed so often.
