A seat assembly is provided with sensors. A controller measures pressure in a plurality of regions with a seated occupant over a period of time. A change in pressure is determined from an initial seating position to a second seating position and evaluated to determine a vector of pressure change. A fidget is identified if the vector exceeds a predetermined value. A camera is directed at the seat bottom and the seat back. The controller evaluates a camera input to determine anatomical dimensions of the seated occupant.