I believe the subjects where students studying wine rather than industry experts and a common criticism of the study is that the subjects where afraid of saying something 'stupid' (like "this red wine tastes like white") in front their professor, and instead went for the safe answer.
Good point, but a well conducted study should be anonymous and shouldn't include the professor inside the room. I doubt that the professor conducted the study (his phd students more likely did)
The second study had random students (not trained ones)
I doubt that the professor conducted the study (his phd students more likely did)
Still looking like an idiot in front of your professor's PhD students (and suspecting they'll be laughing about you over drinks later that evening) probably isn't much better.
I believe the subjects where students studying wine rather than industry experts and a common criticism of the study is that the subjects where afraid of saying something 'stupid' (like "this red wine tastes like white") in front their professor, and instead went for the safe answer.