4 ms·

Off the top of my head, maybe the shock of being jabbed with a needle would have an effect on people's symptoms that should be controlled for.

• bookofjoe 3y ago
  It IS controlled for: ALL participants get jabbed with a needle.
  • sp332 3y ago
    Right, that's why you need to load some needles with a placebo.
    • bookofjoe 3y ago
      Participants receiving placebo get the placebo through a needle.
      • sp332 3y ago
        Yes. I'm in favor of this.