The vast majority of leadership studies have focused on positive aspects such as how leadership can contribute to organisational effectiveness, individual work satisfaction, etc. In an attempt to capture real leadership processes, and thus to avoid a long time one-sided focus upon the positive aspects of leadership, an evaluation form of destructive leadership behaviours, Destrudo-L, was developed. This instrument comprises five factors measuring destructive leader behaviours: (1) Arrogant, unfair (2) Threats, punishments, over-demands (3) Ego-oriented, false (4) Passive, cowardly, and (5) Uncertain, unclear, messy.