If it's informed that you will be possibly disturbed by the experiment, I don't think so. But if you agree to an experiment and wasn't told about it, then yes.

If it's informed that you will be possibly disturbed by the experiment, I don't think so. But if you agree to an experiment and wasn't told about it, then yes. Imagine you sign up to a behavioural experiment, and they put you in front of a tv showing very disturbing images to see how you react, but wasn't told about it beforehand, I don't see how that could be considered ethical.