OCD is a common mental health condition which makes people obsess over thoughts and develop behavior they struggle to control. You can even ask yourself,' Knutson said. 'Still, from a practical point of view it doesn't matter. The team notes a limitation of the research was that participants were only asked one question. It can cause people to have repetitive unwanted or unpleasant thoughts or to develop compulsive behavior  a physical action or something mental  which they do over and over to try to relieve the thoughts.
A physical action is clearly shown in the research.
( z0 show :ARG1 ( z1 act :mod ( z2 physical ) ) :ARG1-of ( z3 clear ) :location ( z4 research ) )
(z0 / show-01
    :ARG1 (z1 / act-02
              :mod (z2 / physical))
    :ARG1-of (z3 / clear-06)
    :location (z4 / research-01))
A physical action is clearly shown in the research .
z1 :mod z2
z0 :ARG1-of z3
z0 :ARG1 z1
z0 :location z4