According to scientific data, 1 in 100 persons is a psychopath, and according to scientific data, 1 in 100 persons suffers from schizophrenia.
Here is what that does not mean: It does not mean if you gather a hundred people in a room, you will have a psychopath, a schizophrenic, and 98 normal people in the room.
You could have a handful of psychopaths in the room and no schizophrenics, or a handful of schizophrenics and no psychopaths, or one person who is both a psychopath and a schizophrenic, or no one who is either a psychopath or a schizophrenic.
Yes, on average, all things being equal, you will have someone in the room with a psychopath diagnosis and someone in the room with a schizophrenia diagnosis, and it might be the same person! Then again, it might be two separate people.
That’s the funny thing about prevalence rates and incidence rates, and how a great many people confuse the two. An incidence rate indicates the risk of something happening while a prevalence rate indicates how widespread something is in society.
So when someone states what the incidence rate of something is, it doesn’t necessarily mean that if you gather up the requisite number of people and sequester them in a room together that you will find anyone who fits the profile indicated by the incidence rate. In fact, you may find that your room of people implies (but does not confirm) an epidemic of whatever it is you were looking for within the group of people gathered.
When autism warriors claim 1 in 34 people has autism, that’s not accurate. It’s only accurate in areas where that is a fact. When autism warriors claim that 1 in 59 people has autism, that’s not accurate either. In 2016, a study of 8-year-olds indicated that among those studied, 1.7% of those studied had autism. In other words, 1 in 59 eight-year-olds.
What does this mean exactly?
It means that in a school with 500 students, there may be 8 or 9 students with autism spectrum disorder. But that doesn’t mean there won’t be more students with autism attending that school, and it doesn’t mean there will be fewer students with autism attending that school.
What’s more, that 1 in 59 claim only applies to 8-year-olds as no other studies of older or younger subjects were conducted in order to collate data collected that would provide what the incidence rate might be for other age groups.
What would be interesting to study would be how many rooms of 100 people yielded one psychopath, one schizophrenic, and two autistics, leaving 96 other people wondering what might be going on with them which no licensed and accredited medical practitioner has diagnosed to date.