A group of researchers say that it's possible to communicate with sleeping people and ask them questions within a lucid dream. The paper's called "Real-time dialogue between experimenters and dreamers during REM sleep."
The authors, led by Ken A. Paller of Northwestern University, say that:
Individuals who are asleep and in the midst of a lucid dream (aware of the fact that they are currently dreaming) can perceive questions from an experimenter and provide answers using electrophysiological signals.
The paper is a review of 57 attempts at dream-communication or "interactive dreaming." In these experiments, participants fell asleep and EEG was used to detect when they were in dreaming REM sleep. Participants then sent a signal (using eye-movements) that they were aware of having a lucid dream, at which point, experimenters asked them questions.
For example, in one case, a lucid dreamer was asked "8 minus 6?" by an experimenter. In ...
