[explosion]

This survey was taken on CodeProject.com, a site which seems biased toward C#, C++, .NET, Java, and mobile devs.

Perhaps it's just that sample of developers who skew toward INTJ, ENTJ and INTP.

I suspect that the results would be different in a survey of developers from a more open source-focused community, e.g. if GitHub conducted that survey and a lot of idealistic open source developer types responded.

[nostrademons]

Google had (has?) an informal "just for fun" Meyers-Briggs type badge on the Intranet. Among people who participate, roughly 65% are either INTJ, INTP, or ENTJ, with a further 10% ENTP. INTJs alone made up about 30% of the company, vs. about 3% of the general population. Only about 10-15% were an S of any type (vs. about 75% of the population).

Yes, there's selection bias on multiple levels here. S-types tend to think that the MBTI is hogwash and so would be underrepresented in any voluntary poll. (The other majorly-overrepresented group was INFJs at ~7-8% vs. about 2% in the general population. In my experience, INFJs are not a significant portion of Google, but they are a significant portion of people interested in the MBTI.) Google also has an INTJ founder and a culture very friendly to INTJs, which skews the numbers inside the company.

But I suspect that if anything, the open-source community would be more biased toward the INTJ/ENTJ/INTP axis. The C#/C++/.NET/Java market has a large number of developers who are in programming because it makes for a good living, which is a more S-based trait.

[natmaster]

Selection bias is only a factor if the selection criteria is a dependent variable. What makes you think open source will change MBTI traits?