Here is the full list of all 12 Personality and Psychology Premium trophies - there are 6 silver and 6 gold.
Finish one of the 32 serious tests.
Finish all 'THE INSIDE' tests.
Finish all 'THE OUTSIDE' tests.
Finish all 'THE ACTIONS' tests.
Finish all 'THE OTHERS' tests.
Finish all 'THE SEX' tests.
Finish every serious test available.
Do all 'Graphical Tests' back to back.
Do all 'questions & order' tests back to back.
Do all 'birthday' tests back to back.
Do all 'story' tests back to back.
Test multiple players at the same time and compare their results.