Do I need to prepare anything in advance?

No special preparation is needed, but here are a couple of things that will help: 

A private / quiet space: We recommend completing the questionnaire somewhere private and quiet where you will not be disturbed.

Headphones or speakers: One section of the questionnaire involves listening to a recording, so you will need to be able to play audio on your device. You might need headphones or speakers to ensure you can hear properly.