Hidden images as tool of manipulation

"Or hidden images as tools of neuro psychological manipulation".

This is just a theory I made up and I'm now researching for art purposes yet unknown...

Assumption is that it is possible to make imagery that has extra content which is completely hidden from the viewers consciusness, but the still has powerful conditioning effect at neural level. This assumption is based on observations, visual recognition and neural networks theory ect.

I haven't found much previous research about this specifig area yet. I'm sure there is some.

Do you have reading recommendations about this or something related. Ideas how to study and test this in practice. Also discussion about this is very welcome.