[mjmahone17]

1. No, IQ tests capture what a certain type of people mean by intelligence. This is especially true, given that I can consistently perform less well on, for example, the spatial portion of an IQ test than the logical portion. Unless you're willing to say that there is not any other important component (such as say, oratory intelligence) to someone's ability to perform, or be intelligent. My skepticism says it's likely that, in fact, there is a positive correlation between how good you are at manipulating objects and math and your IQ score, whereas there's little to no correlation between emotional acuity and IQ. But if, due to your social skills and emotional abilities, you're not able to cut it in the arts or humanities, you're more likely to become an engineer. Which tells you nothing of what types of majors "roundly" intelligent people (i.e. those with relatively equal IQ and non-IQ intelligence) choose.

2. Your source doesn't even support your assertion, at least if you're claiming non-engineers, in the same companies as engineers, are on average less intelligent. Mathematicians, Philosophers and Economists are overwhelmingly non-engineers. CIS gets the same IQ as "Other Humanities and Art".