Psychological Profile in Mass Effect opens up different dialogue options during gameplay and affects the character's morality. The Psychological profile makes up the second part of your agent's background. Each background choice comes with certain bonuses that directly affect your desired style of play. Your choice affects dialogue during the story and assignments made available at certain points of your career.
Mass Effect Psychological Profile
As seen in Pre-Service History your agent's profile affects morality points bonuses too.
During your service, a mission you were on went horribly wrong. Trapped in an extreme survival situation, you had to overcome physical torments and psychological stresses that would have broken most people. You survived while all those around you fell, and now you alone are left to tell the tale.
- Grants part Paragon, part Renegade bonus point.
Early in your military career you found yourself facing an overwhelming enemy force. You risked your own life to save your fellow soldiers and defeat the enemy despite the impossible odds. Your bravery and heroism have earned you medals and recognition from the Alliance fleet.
- Grants a Paragon bonus point.
Throughout your military career, you have held fast to one basic rule: get the job done. You've been called cold, calculating, and brutal. Your reputation for ruthless efficiency makes your fellow soldiers wary of you. But when failure is not an option, the military always goes to you first.
- Grants a Renegade bonus point.