Abstract: In order to draw a reliable conclusion about the existence of a jamming situation, in particular in a seat adjusting means, provision is made to distinguish between the following movement classes: a) running difficulty of the adjusting apparatus, b) jamming of an object, c) encountering an end stop, and d) sudden counter-reaction, with a decision criterion (c, c1, c2, M3) being derived from detected characteristic variables (u, i, n) of a motorized drive (2), and the current state of the adjusting apparatus being associated with one of the movement classes on the basis of said decision criterion.