A computer-based d2 test of attention with a backend written entirely in node.js.
The current version provides an extensive functionality and can be customized to fit any needs. However, the client UI is written in german - a translation should however be rather easy by editing the dev/index.html file as well as adapting the error messages in dev/main.js.
For detailed instructions, consult the manual (english) in doc/manual.pdf. This manual aims to be as simple as possible and targets even the non computer-literate.