Mrs Helgoe debunked the Myers Briggs Type Indicator. It is used a lot even by those who should know better to classify human personality traits.
It is quite something when research shows how much popular methods are wrong. Instead of representing a 25-30% of the population, introverts make up 57% of the population. It means that Myer Briggs is off by 100%.
The critique of the article for Mrs Helgoe has it that it is an orphan; no articles link to it. Having read the article, it is more valid to find fault at the Myers Briggs article; it does state that the method is not valid but it more less glosses over that fact.
The problem with the Myers Briggs article is that it attempts to explain the method used, a method that is invalid.