[Reproducibility of the factorial structure of the AMP system].

Using the data of 552 patients mainly suffering from endogenous psychoses, the factorial structure (2--9 factors) of the AMP system was determined and compared to the results of a previous analysis. The 2- to 5-factor solutions were reproduced. In the 9-factor solution, on which the 9 known AMP scales are based, 2 factors ('paranoid' and 'hypochondriac syndrome') were not completely reproducible.