The institute operates its own portal to acquire participants for studies and experiments. For many studies, you can also obtain Versuchspersonenstunden for your study.
You can find the portal online at: https://tu-berlin.sona-systems.com 
The proof (form can be downloaded here , print out several
times if necessary) of the VP hours completed is to be included in the
work and is part of the examination performance.
Attention: Printouts from the Sona portal do NOT replace this form!