I belive in presences but not ghosts, simply because I haven't seen one. I do belive you can feel someone in the same room. Yesterday I was playing this game where you close your eyes and someones could be behind you and you have to guess if there is. It was strange because this girl I really don't like stood behind me and I could feel like a cold, sour aura from her but then when someone I liked stood behind me I didn't guess she was there because It was just a bit warmer and it was like a happy feeling. I think spirits might be with us all the time we just don't know it. As for mediums etc. I think they have some ability but most of it is guess work and fancy tricks. As for ouiji (?) boards i've been told they work by my dad, and I tend to trust my dad.

But as for scientific proof, I don't think there can be un-baised experiments when it comes to ghosts.