When designing user interfaces, the knowlegde of human perception parameters is crucial for engineers. However, in many cases it is hard to find the exact properties needed – and engineers have to start doing psychophysical experiments.
Rotary elements are very versatile and often used elements in Human-Machine-Interaction (HMI). Since they are very common in automotive applications, a lot of studies were made by or in cooperation with automotive manufacturers (see for example Reisinger (2009), Reisinger et al. (2006) or Anuguelov (2009)). In the last year, Manuel Kühner published his dissertation “Haptische Unterscheidbarkeit mechanischer Parameter bei rotatorischen Bedienelementen” as addition to the existing studies.