I agree that all these criteria for study partcipation are true for me:

I am an adult, aged 21-65,

I can speak, read and write English,

I have microdosed LSD in the past to extent that I have already determined what my sub-perceptual dosage level is,

I am not currently taking any SSRIs or SNRIs,

My previous LSD microdosing practices have included dosing at 20µg or less,

My previous LSD microdosing experiences did not include serious negative side- effects,

I have no major psychiatric diagnosis, such as bipolar disorder, substance use disorders, delusional disorder, dissociative disorder, schizophrenia or other psychotic disorders,

I have never been hospitalized at any point in the past for psychiatric reasons,

I have a trusted source for acquiring LSD,

I do not have red-green color blindness,

I have no developmental disabilities such as autism spectrum disorder,

I am not pregnant, and am not trying to become pregnant,

I agree to use the three-day microdosing cycle while participating in this study, and intend to engage in 10 cycles during the course of this 30-day study,

I agree to not communicate with others about study details until all data has been collected from all participants,

I agree to not use any psychedelic substances (including microdosing) for one month prior to my participation in the study as well as throughout the course of the study, with the exception of the microdosed LSD that will be used during the 30-days of data collection and,

I am willing to travel to our lab in Redwood City, CA for an initial in-person orientation lasting an hour to an hour and a half (travel expenses will be compensated for up to $30 per trip depending on your distance from the lab),