IQ tests often feature puzzles where the subject must identify and extrapolate a pattern in a sequence of symbols. One might hypothesize that someone who is good at doing that would also be good at finding patterns in random symbols, or otherwise finding connections between unrelated things. This may lead to a tendency to believe that things are connected when they aren't. Is there any research demonstrating a relationship between the ability to see patterns and the tendency to find patterns when they "aren't there?"
Clearly, someone who can't see any patterns would never commit type-II error, but on the other hand someone who can see lots of patterns may have well-calibrated instincts from experience with other patterns that appeared to them but later turned out to not be there. It's not obvious to me how those competing factors would balance out as you went from low-g to high-g.