I think "psuedo-hallucinations" is the term for the experiences of having something apparent but not believe as in an LSD trip. "Confabulation" is used for bit

I think "psuedo-hallucinations" is the term for the experiences of having something apparent but not believe as in an LSD trip. "Confabulation" is used for bit of information the brain constructs to give reality a cohesive quality. "True hallucination" are described as things you see and believe in that aren't there - delusion is a false belief, so a true hallucination is kind of delusion. The article seems to talk a lot about how people hallucinate after being prompted. This is pretty directly "suggestibility tests" studied by hypnosis. How much hypnotic effects involve actual delusion and how much they involve confabulation and "going along with the situation" is a subject of debate.