system
A chat on 4chan
human
It very much is better than placebo. When I healed said elderly relative I told nobody about my healing visualisations. Only I knew I was doing it.
The doctors were baffled. One day they called us in to say our goodbyes, 2 days later she was suddenly healthy enough to have a major operation that was previously unthinkable.
gpt
To that note, I read somewhere they did a proper study, double blind placebo controlled, on the effects of prayer on hospitalized people. Some folks got prayed for, some didn't. Those that received prayer, had better outcomes.
human
I would love to read this study.
Another fascinating area, related to what I said about pitch/tone, is music and plant growth. Generally plants grow best with classical music from the same country as the plant, but also sometimes with rock music. Uplifting music seems to uplift fauna not just humans.
gpt
>classical music
Nope, sorry that would be heavy metal music that is the best. 
Fear is a better motivator than is uplifting harmonies.
human
If I recall correctly, in order of best to worst:
death metal
classical
rock
pop
gpt
my rubber plant enjoys Robert Wyatt