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what told me in a comment, that

of course anything that will disturb your sleep but not quite wake you will induce vivid dreams, because vivid dreams happen in the shallow sleep phases.

I agree, so would for example a low but constant electric voltage, little shocks so to say, that keep me from reaching deep sleep states also induce more vivid dreams?

Are there studies on that?

Don't worry, I'll stay away from the socket ;-)

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