The motivation behind these group dosage experiments is primarily about exploring ways to streamline the treatment process… [COMPASS claims] scheduling more than one patient at a time offers the potential for accelerating the pace of clinical trials.

However, it is worth noting, this particular study was conducted with psychologically healthy individuals, and not subjects suffering from mental health concerns. So, it is unclear at this point whether psychedelic group sessions are as efficacious from a treatment perspective.

Original Article (New Atlas)
New Psilocybin data explores group psychedelic sessions
Artwork Fair Use: Brandon.wiggins