Hallucinations and delusions are most likely to be experienced by those who suffer from

In order to accurately determine absolute time, you need to know which of the following?

Which groups of people most directly benefited from song innovations in the song dynasty‘s open border policy?

Martha participates in a research study in order to receive extra credit for her psychology class. when she arrives in the research office she is given a can of what looks and tastes like beer, but which actually contains no alcohol. in the adjoining room martha's classmate karen is also participating in the study. karen receives a can of alcoholic beer. if the experiment was designed to test the effects of alcohol on concentration, then who is exposed to the independent variable?