Asslaam o Alaikum,
Although I am not among the members you mentioned but let me give you brief idea for preparation
Psychological: (2days exam)
1st day:
Different psychological tests like
Sentence completion.story writing,your biography,IQ tests etc
2nd Day:
Group discussions (English and URDU)
Command Task
Interview with the psychologists
For Interview:
Divide it into four parts:
1st Part:
Current Affairs (National + International)
2nd Part:
Your optional subjects
3rd Part:
Your credentials(Family,district,personality,education, goals, achievements)
4th Part:
Your preferred group(PSP,DMG or any other )
Good Luck
