Here's the paper they cite on the correlation between the twitch response and subjective hallucinogenic effects: https://sci-hub.se/https://www.sciencedirect.c

Here's the paper they cite on the correlation between the twitch response and subjective hallucinogenic effects: https://sci-hub.se/https://www.sciencedirect.com/science/article/abs/pii/S0028390819305040 https://sci-hub.se/https://www.sciencedirect.com/science/art...