How to properly investigate historical hauntings – avoiding the tourist trap factor

Right, I've done investigations at Pendle Hill, Pendle Castle, Pendle Museum, and about fifteen other 'haunted' locations across Lancashire and Yorkshire, and I've noticed a pattern: the places that are actively commercialized as tourist attractions seem to have way more reported activity than places with similar historical trauma that aren't monetized.

This is interesting for two reasons: (1) it might suggest that expectation bias and environmental psychology play massive roles, or (2) the paranormal is actually drawn to attention and footfall, which would be absolutely fascinating if true.

My question: How do we design investigations at historical sites that account for this bias? What's your methodology for separating genuine phenomena from the influence of tourism and expectation?

I'm working on a guide and would love to crowdsource some ideas from more experienced investigators.

The psychological factors are massive and most amateur investigators don't account for them properly. You need: control sessions (investigations in mundane locations), blind testing (not knowing which location you're actually at), and ideally multiple independent witnesses who aren't communicating with each other beforehand.

Good observation about the tourist effect. I'd add that heavily visited locations might have genuinely higher activity because of the environmental changes - more foot traffic creates subtle electromagnetic disturbances, temperature fluctuations, etc. It might not be paranormal at all, just physics.

the places that are actively commercialized as tourist attractions seem to have way more reported activity than places with similar historical trauma

The way I control for this: I investigate the same location multiple times across different seasons, different times of day, with different team compositions. I also specifically investigate non-touristy historical sites that have comparable trauma but no paranormal reputation. The comparison data is actually more interesting than the main investigation.

If you're serious about methodology, you need to read up on parapsychology's ganzfeld experiments and statistical protocols. Most paranormal investigation is basically astrology - pattern-seeking without control. A proper guide would focus on eliminating variables rather than building dramatic narratives.