Survey approach
While the validity of the existence of paranormal phenomena is controversial and debated passionately by both proponents of the paranormal and by skeptics, surveys are useful in determining the beliefs of people in regards to paranormal phenomena. These opinions, while not constituting scientific evidence for or against, may give an indication of the mindset of a certain portion of the population (at least among those who answered the polls).

One such survey of the beliefs of the general United States population regarding paranormal topics was conducted by the Gallup Organization in 2005.[20] The survey found that 73 percent of those polled believed in at least one of the ten paranormal items presented in the survey.

Items included in the survey were as follows (the percentage of respondents who indicated that they believed in the phenomenon is in parenthesis): Extrasensory perception (41%), haunted houses (37%), ghosts (32%), telepathy (31%), clairvoyance (26%), astrology (25%), communication with the dead (21%), witches (21%), reincarnation (20%), and channeling spiritual entities (9%).

Only one percent of those surveyed believed in all ten items.

The items selected for the survey were chosen because they "require the belief that humans have more than the 'normal' five senses."

Another survey conducted in 2006 by researchers from Australia's Monash University[21] sought to determine what types of phenomena people claim to have experienced and the effects these experiences have had on their lives. The study was conducted as an online survey with over 2,000 respondents from around the world participating. The results revealed that around 70% of the respondents believe to have had an unexplained paranormal event that changed their life, mostly in a positive way. About 70% also claimed to have seen, heard, or been touched by an animal or person that they knew was not there; 80% have reported having a premonition, and almost 50% stated they recalled a previous life.[21]