Earlier quoted context omitted.
> In the last company I worked in London, only one team (DevOps) did not follow scripted interviews. It was the least diverse team, not just in terms of representation, but in terms of diversity of thought. Did this result in poorer job performance for the DevOps team, or any other negative business results that were specific to that team? If not, who’s to say which interviewing method was better or worse? As an inte…
Research shows more diverse teams deliver better results. You’re asking something that can’t be proven though: is this thing that is occurring better than the thing that didn’t occur. We can’t know the answer to that.
FYI, there's plenty of nuance in the research that people like to gloss over. My understanding is that diversity of background / experience improves team performance. But having a diversity of values amongst your team decreases performance.
For example, if you form a diverse team where some people care about profits above all else, and other people care more about doing good in the world, the team will become less effective. Its really hard to use this research when hiring because a lot of values questions (like "who did you vote for?") are somewhere between creepy and illegal to ask.
Source: I used to work with someone who had a PhD in psychometric assessment. People saying "diversity=good" was one of her bug bears. I haven't read the research myself.