> 2. It would immediately become obvious to the subject if they were injected with salt water or ketamine. this is not part of the definition of double blind.

> 2. It would immediately become obvious to the subject if they were injected with salt water or ketamine. this is not part of the definition of double blind. There maybe drug effects and there may be placebo effects. If you don't know and the person administering it doesn't know, then the effects you report or measure are what is being studied over the group of people in the study. > 3. Within minutes it would become obvious to everyone in the room if the patient was injected with salt water or ketamine. also not part of the definition of double blind.