Amp up (6)
(Other definitions for psych that I've seen before include "Intimidate someone by making him feel uneasy" , "Mind doctor (colloquial abbreviation)" , "To subject to mind games" , "Stimulate" .)
(Other definitions for excite that I've seen before include "Inflame or stimulate" , "Cause (someone) to feel very enthusiastic" , "Get worked up" , "Make (someone) eager" , "cause a stir" .)