Some real research provides sound results.

“In this paper, we report on a use case study involving 70 participants. They first took part in user/laboratory tests and then were asked to evaluate their experience with the two systems (perceived UX) by filling out an AttrakDiff scale and a UX needs fulfillment questionnaire. We conducted post-test interviews to better understand participants’ experiences. We analyzed how the participants’ perceived UX depends on quantitative (e.g., task completion time, task sequence, level of familiarity with the system) and qualitative aspects (think aloud, debriefing interviews) within the laboratory context.”

Carine Lallemand a.k.a. /carinelallemand | @Carilall and Vincent Koenig a.k.a. /vincent-koenig ~ Journal of Usability Studies 12.3 ★