Metadata records the tracked eye only once #875
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The function
pymovements/src/pymovements/gaze/io.py
Line 271 in 49802e4
returns a dataframe and a dict where metadata is stored.
This metadata dict has a key 'tracked_eye' and can have the values ‘L’, ‘R’ or ‘LR’
which are extracted by the following pattern:
pymovements/src/pymovements/utils/parsing.py
Lines 51 to 56 in 502dc44
and executed by the following code line:
pymovements/src/pymovements/utils/parsing.py
Line 350 in 502dc44
However, this implicitly assumes that the tracked Eye does not change during a Session.
It would be better to have a record of the tracked eye for each trial during the Session.
The implementation could also have effect on issue #868 and #686
To achieve this we can perform the matching multiple times instead of only once, and save them for example as a list, where the tracked eye for each trial is stored.
Description of a solution
create a separated TRACKED_EYE_REGEX
remove it from the EYELINK_META_REGEXES
adapt :
pymovements/src/pymovements/utils/parsing.py
Line 178 in 502dc44
The additional information extracted can then be used for example for quality checking (is the same eye tracked during the whole experiment)
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