Post title raises an expectation that is hardly met. So what are the psychological effects? Oh I don't know, here's some random thoughts about C++ code style.
Worse: its psychological claims are entirely made up and only serve to artificially support his chosen style. It's the worse kind of argument: using made up science that is thus impossible to counter.
I find this comment and the one above way too harsh. The author of the article does not make any strong claim at "science"; it is written as a deliberately subjective series of musings.
The author doesn't claim to make a universal determination. The supposed claims are introduced with "here's how I would psychoanalyse my own preferences."