Engineers distrusting blind tests converted upon seeing correlations with their measurements.

Evidence

This process was new to the Harman engineers. They had questions, and there were doubters. However, when the results started being revealed, and the engineers participated in the double-blind evaluations of their own products, they became enthusiastic users. They could see the correlations between their measurements and listener ratings. Winning the double-blind comparison with prominent competing products became the challenge. — Toole, Floyd E, Sound reproduction- the acoustics and…, 1108