"Turning the knob clockwise (in) increases rear brake pressure" is the correct answer. I went through this exercise on my car when I first got it on the road. I thought if you unscrewed (counterclockwise) the knob that it would let more pressure to the rear wheels but I was wrong. It's a complicated explanation about the internal springs (see yesgo) but he is correct. Contrary to what seems logical, you do screw it in (clockwise) to let more pressure to the rear brakes.