Title: Q & A: Observer Effect? | Department of Physics | University of Illinois at Urbana-Champaign
Headings: 
Q & A: Observer Effect?
Follow-Up #1: quantum
Follow-Up #2: observation and light
Follow-Up #3: measurement and consciousness?
Follow-Up #4: free-will?
Follow-Up #5: confusion between the uncertainty principle and the observer effect
Follow-Up #6: Quantum for the non-scientist
Follow-Up #7: Unconscious observers
Follow-Up #8: Bell's Inequalities and free will
Follow-Up #9: free will and quantum mechanics
Follow-Up #10: what collapses wavefunction?
Follow-Up #11: What causes quantum interference loss

Content: ...I'm just wondering if the literal Copenhagen interpretation can be side stepped. - Devon (age 23)
Lansing
A: Our usual stories about observation involve light, but it isn't essential. Anything that leaves some sort of external record which differs depending on which path was followed will do. Mike W.
(published on 12/01/2009)
Follow-Up #3: measurement and consciousness? Q: Are electrons conscious i.e. do they know that they are being observed? Secondly, do they change their behaviour when someone tries to watch it? - Indrajit Kuri
New Delhi, India
A: