Although aggression as social phenomenon is widely researched, this research study aimed to illuminate the importance of early identification of excessively aggressive children specifically. The aim was to explore and gain an in-depth understanding of excessive aggressive behaviour during the preschool years. A qualitative research methodology was employed consisting of a parent interview, observations of the research participant and numerous play sessions consisting of various activities including free drawings; ‘Draw-a-Person ‘, a family drawing; the ‘Children’s Apperception Test’, and free play activities. The study explored various factors possibly leading to the onset and continuation of excessive aggressive behaviour. It seems clear that no single factor is responsible for the display of excessive aggression, but rather, multiple factors contribute to the problem of aggression as a whole. Play therapy is suggested as an effective method in the assessment and counselling of excessive aggressive behaviour in preschool children / Psychology / M.Sc. (Psychology)