There is first a HR consultant that does a personality screen, then her feedback is passed on to the Kaplan hiring managers which they use as a basis to form their questions. Psychology based. The HR consultant will try to convince you she is your friend, be very careful with her.
The problem is the HR consultant makes her own judgement calls and heavily influences the interview, she will determine whether you get the job or not, this is how she demonstrates her value to make her top consulant salary. She does not strike me as actually being that bright.
Overall I got the impression this was not a good company to work for after meeting with the project managers. Highly non technical, manipulative, overly sensitive, political.