how many psychopaths out of 100

1 in How Many People Is a Psychopath? The Ratio, Not the Percentage

About 1 in 83 when a clinician scores the PCL-R, about 1 in 22 when every instrument is pooled, about 1 in 19 on self-report. The ratio makes it obvious that these are four different rooms, and shows you which one you are standing in.