Research shows: if you are a very busy polygraph examiner, you can ignore 'Blocked Number' calls!
For 3 years, PEOA has kept a specialized log of incoming calls from prospective examinees.
Results:
Calls from non-withheld, number-shown callers- about 60% actually had a polygraph examination done
Calls from 'Blocked Number' or 'Withheld' callers: about 10% actually had a polygraph examination done