[ivalm]

Grandop said

> research suggests that interviewers know after 20 seconds whether they'll hire someone.

That’s not first impression, that’s a meaningful ability to see if I hire someone. I can tell you that without seeing code/discussing some previous experience there is zero chance I can form hiring decision for most reasonable candidate (the only 30 second hiring impression I can form is perhaps a negative one).

[brailsafe]

I meant to be less specific than "hire someone", but I'd wager that once a subconscious impression is formed, you'd be more likely to bias your interpretation of whatever else they say.

[ivalm]

Right, I am sure I have a first impression, which could be good or bad, and that impression does inform my later views. However, just objectively I know for a fact that I declined some candidates I initially liked and I hired a few people who initially was super shy/not communicative.