No I’m not talking about suggestion in the sense of, “maybe you should try the crab bisque”, but rather in the sense of psychology and dealing with the conscious mind.
A definition of suggestion is
The act of focusing the conscious mind of the subject upon a single dominant idea.
The idea that your brain can be so focused on an idea that it can cause a change in your own physical body or stimuli. Perhaps causing your hands to do something or your mind to forget certain words in an experiment. Here is a simple example that everyone can try that involves your hands and suggestion.
Give it a shot and let me know how it goes for you.