Should divination tools be used in investigating the paranormal?

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Several years ago I was involved in a paranormal investigation group. A few members of this group used dousing rods as well as pendulums during investigations and encouraged others to do the same if they so desired. Later, 2 years later, members were enlighted that the group was a fraud. However, I had the chance to learn of these divination tools and to use them. I have several pendulums and a pair of dousing rods. What I would like to know is how accurate are these tools during a paranormal investigation? Should they be used? Why or why not?