It's possible research incentives or rewards contribute to the construction of positive conclusions in order to gain media attention or to be accepted for publishing

I have always viewed this as a given. The researches will most often sell out for the funding and recognition, the projects they are assigned ones seeking to prove what those with the money want them to prove. I would go further and say if the evidence shows the opposite, it is buried and careers as well if those researching don't go along with the program.