MATLAB/pyschtoolbox task code is available on github:CogEmoFaceReward. It was developed for MultiModal/MultiModal Year 4 (2015). Additional usage and development continued by DNPL and dependlab (Dombrowski, Hallquist), including a port to Millisecond Inquisit and 2025 publication.
For MEG timing, a corner box flashes black/white to encode event display onsets with a photodiode.