I’ve long argued that the original Michael Myers character (as conceived by John Carpenter, not to be confused with the Michael Myers of the Rob Zombie films) had an IQ around 90.
My logic is simple. The average IQ of white Americans with zero years of completed education is likely 72 (borderline intelligence), yet the average IQ of white siblings of the National merit finalists is 119 (Bright Normal intelligence). Someone who belongs to both these groups has a statistically expected IQ of 91 (white norms).
Carpenter’s Myers arguably belongs to both groups. He has zero years of completed education because he’s confined to a mental hospital at age six, where he spends the next 15 years just sitting in a room, staring at a wall, never speaking or moving.
And yet in Halloween II (1981) we learn that he’s the brother of heroine Laurie Strode. We’re never told that Strode is a national merit finalist, but it’s likely she is. She studies chemistry, is able to correctly answer her teacher’s question about fate despite not paying attention, and is always babysitting because guys think she’s too smart to date. Add to that the fact that she’s played by Jamie Lee Curtis who is half Ashkenazi Jewish (a high IQ group), though it’s unlikely Strode is genetically Jewish since she’s supposed to be a Midwestern girl next door type, and these tend to be WASPs.
However David Gordon Green’s Halloween (2018) is a direct sequel to the original Halloween (1978) and ignores Halloween II (1981) and all the other sequels, which means Myers is no longer related Strode, and thus no longer shares her IQ DNA. Thus he goes from being a zero education sibling of a National merit finalist, to just a guy with zero education, and as stated above, these average IQ 72.
Even though the film writers likely gave no thought to Myer’s IQ or what his relationship to Strode implies for it, it’s interesting how ignoring all the sequels not only lowers Myers’s likely IQ, but also causes his body count to drop precipitously (which is exactly what you’d expect since low IQ people are less competent at achieving all goals, even evil ones).
In Halloween II (1981), Myers was able to continue and more than double his killing spree after escaping from the mental hospital at age 21, but now that Halloween II (1981) is no longer canon, Myers’s night of terror ended early, and he was returned to the mental hospital after killing only four people, and killed no one since until he was 61. It seems like without Strode’s high IQ DNA, Myers is a far less prolific killer who shows none of the technical savvy he showed in the now defunct sequels such as inserting an I.V. drip into a nurse’s vein and draining of her blood.
Not only does this new timeline rob Myers of 19 IQ points, it also robs him of his autism. When Myers had the bizarre sister obsession, I argued he showed classic autism, but with the sister plot removed from the story, he’s a more run-of-the-mill serial killer, but with an extremely low IQ. Indeed you can tell from the grunting, whaling, and inefficient behavior in the classic closet scene in the original Halloween, that Myers was mentally disabled, while high IQ Strode was adaptable enough to turn the situation to her advantage (the ultimate measure of intelligence).