[mdavis6890]

I think 2 weeks off roast is close enough to 'fresh' that the difference is going to be subtle. I'd love to see an experiment like this with 3-day old vs 2-months old. I'd guess most people could tell in that case.

And maybe then bring that two months in and see where the cutoff is that people can/can't tell. I'll guess it would be 3-4 weeks or so for most subjects.

I've never heard of a "triangle test" before but I like that format!

[AlbertCory]

Yes. 1/3 chance of being right randomly. So even 3 right answers is 1/27, which is below the p = 0.05 threshold commonly used.