siggy,
Psychological domination explores the mental realms of your desires. Fear, anxiety, emotional manipulation, unrequited desire, repetition, etc. Instead of simply tying someone up and beating them, you engage the client in a more cat-and-moust type of chase, where there are aspects of the situation that are unspoken and hopefully misconstrued.
These are not purely mental, but start in the physical, and affect the mental.
For example, one of our clients is very intelligent and inventive, thus cerebral. He likes to be outsmarted and overpowered, but not necessarily with brute force. Games are a great way to engage and captivate in a more mental way.
Trickery is key in psychological domination as well.