Of course you changed, interpreted and were biased. You are human! (I hope). I am not talking about deliberate conscious bias but completely unsuspecting unconscious bias! Maybe that is the misunderstanding....
My DD had awful colic for about about 2 months. It stopped all but dead on the day I went to get my haircut. These events may appear related as I had not had my hair cut since birth or throughout the whole time the symptoms happened and they ceased immediately after but I think you will agree it is unlikely. I wonder how many time I would have to repeat that before you would believe that hair cutting influenced colic? If my DD had started up with the wailing later that week and another hair cut had calmed her? Would that be enough? Or 3 times? Or 4? Or would you never believe it?
So one last ditch attempt....
In controlled trials on a variety of colic treatments the placebo effect generates between 30 and 50% reduction in crying. So that means that when you do something that is either nothing, or something that no-one is expecting to make a difference, the symptoms reduce on average between 30 and 50%.
Are you claiming that all the people in those trials were different to you? That they were susceptible or gullible while you, uniquely aren't?
Control treatments included, doing nothing, pretending to give cranial osteopathy but not actually doing anything, adding a ml of water to a bottle feed, giving a ml of water by syringe into mouth etc. etc. and all showed a huge reduction in crying.
So can you acknowledge that the reduction in crying you saw may have been the same as that seen by the parents in these trials who were actually not receiving any meaningful treatment? That therefore it is not possible for you to tell if the bottle was helpful or simply that any perceived difference is likely to reduce symptoms even if no actual change is made?
Or maybe you really are the first of a new breed of superhuman completely devoid of unconscious bias....you are not vulnerable to the placebo effect and unlike ever other human alive, only ever see causal relationships where they actually exist!
If so can I make a plea that you devote yourself to the performing of medical trials? Currently they are very expensive and time consuming because you have to test so many (hundreds) normal humans in order to eliminate all the possible biases and placebo effects....but we could just use the one of you and get it right every time!