I have decided to join this website in order to discuss these unexplained occurrences that do happen from time to time. I am unable to talk to my housemates about these incidents due to their rigid belief in that 'science explains everything'. I am not denying that it does explain most things, however the things that have happened during this last year is unexplainable to myself and my family.
To begin, a small matter of beautiful lights would shine in my room at university and at my home for only a brief moment. Many would argue that it is my guardian angel (for whom a fortune teller has revealed that it is a little boy); in other cases I could regard this as fearful. At first I did believe it could have been the reflection of a light; however I could not find any solution as to how this could have happened.
In another case, in my university residence and home address I can every so often hear the dragging of footsteps. For instance, just now I could hear somebody walking up the stairs which did agitate me slightly. It is rather odd and I do not believe that these occurrences are a figment of my imagination at all. I always feel like somebody is watching me and it is keeping me awake.
Furthermore, although I was not involved in this event, my brother was able to catch a glimpse of a Victorian boy in his room that continued to stare at him. Personally, I am glad that I did not see this. But does anybody know if stress triggered by an event like this can cause somebody to hallucinate these images? I just don't want to be scared anymore.
What happens is, our MINDS create a constant. That constant can be the one thing that we are frightened OF. So, technically, Yes. Stress OF the situation CAN trick our minds into thinking we experience something that we do not.
However; as your housemates are scientific- you have a perfect opportunity to gather evidence either OF a haunting, or against it. Are you able to tempt them with a bit of research? I will tell you honestly, I would rather have four people trying to DISprove what I have experienced, then have 25 just follow like lemmings and agree because it is chic.
IF this were me, I would not present myself as a hook, line, and sinker believer. Personally, I would assume the attitude of "prove to me this is physical. TELL me what these lights are as they are annoying..." If you do not present yourself as trying to find ghosts, the logical mind (as you said your housemates have) tends to want to find out what the cause of certain things are.
Good Luck.