The BEST definition for mouthing behavior would be any instance of LukE.
placing his mouth on any object for at least 5 seconds.
placing his open mouth on a non-nutritive object or placing a non-nutritive object in his mouth.
making contact with his mouth to any non-nutritive object.
mouthing a non-nutritive item for 3 or more consecutive instances within a 30 second interval.
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