I told my CFI I would self-Study the Human Factors stuff, but I covered a lot of it in the RAF, as Crew Management/dynamics was coming to prominence then, and I did the Aero-Med Course at North Luffenham which included some interesting Practicals not usually on the PPL Syllabus:
Dis-orientation box (Black box that spins around to demonstrate the affect of losing ones horizon and the tricks the semi-circular ear canals can play)
High Pressure Oxygen Breathing (probably more useful for Canberra rather than Piper Crews)
Rapid Decompression and the effects of Hypoxia in the Decompression Chamber.
I will talk to my CFI to see what form the exam will take.
I expect that the desired out come of both the LST and LPC is to ensure that the candidate is safe and fit to fly.