We describe the Developmental Profile and the development of the instrument, the theory on which it is based, and the manner in which information is collected, interpreted, and used in clinical practice. We present the results of the psychometric research that has been performed to date. Finally, we examine the extent to which this method is in accordance with recent insights within the field of personality diagnostics.

This study presents the preliminary results of research into the interrater reliability and construct validity of the Developmental Profile (DP). In the DP a number of developmental lines, such as Object-Relations, Self-Images, and Problem-Solving Capacities, are assessed and classified according to the level of functioning. A total of 108 profiles were assessed, drawn from three different categories of patients. The weighted kappa values for interrater reliability were sufficient. On the adaptive level, but also on the maladaptive levels Symbiosis and Resistance, significant differences were found between psychiatric patients, "normal controls" (dental patients) and somatic patients. No differences were recorded between the latter two groups. The conclusion is that the DP is a promising instrument, of which the reliability and validity has to be further investigated in order to contribute to scientific support for psychodynamic theory formation.