Table 1 Patient demographics and experiment details

Demographics			During experiment
Gender	Handedness	Y-BOCS score	OCD subtype	Obsessions induced by	Compulsion behavior
F	Left	8 + 7^a	Contamination	Touching the floor	Washing hands
F	Right	18 + 18	Religious	Reading a religious text	Praying^b
F	Right	18 + 17	Contamination/checking	Touching the floor	Washing hands
F	Right	19 + 18	Contamination/checking	Others touching a personal object brought from home	Inspecting^c the object
F	Right	19 + 20	Contamination/symmetry	Touching the floor	Washing hands
F	Right	17 + 19	Harm/checking	Thinking about a fire risk	Checking whether there is a fire
F	Right	17 + 16	Contamination/symmetry	Touching the floor	Washing hands
F	Right	17 + 16	Contamination	Touching the door knob/light switch	Washing hands
F	Right	16 + 19	Harm/contamination	Thinking about a personal contaminated object	Checking photographs to see the object is clean
M	Right	11 + 11	Religious	Reading a religious text	Reading a reassuring text
F	Right	17 + 16	Contamination	Touching the floor	Washing hands

F, female; M, male. Yale–Brown Obsessive Compulsive Scale (Y-BOCS) scores are displayed as obsessions + compulsions.
^aThis patient had already undergone DBS treatment and was recruited into the current study after a replacement of the device battery. The original clinical Y-BOCS score was 38.
^bThis patient occasionally wrote.
^cThis patient occasionally washed the object.

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