I'm unsure. Supposedly I saw my Mum as a ghost shortly after she died. My Dad asked me who I was smiling at. I was 3 and don't remember it. But then, I think it can be common for young children to think they've seen deceased loved ones. Or, maybe we're more open to at that age. My Aunt also said that she saw her. But then, it was at night for her. She woke up and saw her standing there. But then, I've seen all sorts of things when I've only just woken up.
My Dad also saw his Grandma apparently and, something weird happened when him and a friend were messing around with an ouija board. Apparently, they did 'reach' a distant relative.
I'm really not sure though. I kind of hope not because I don't want there to be an afterlife but, I believe enough that weird goings on would frighten me. I wouldn't muck about with things like ouija- just in case.
Then again, I was watching clips of QI the other night and they made a good point. Why aren't there ghost animals?