Catalysing water saving behaviours in Australian urban households KNEEBONESARAH CAROLINE 2019 Water demand management is a critical and complex issue globally and for Australia. Engaging householders to change their water consumption behaviours forms an important part of the solution. The spillover effect is proposed to accelerate such change by leveraging or catalysing additional behaviour adoption from new or existing practices. This thesis describes how household water saving behaviours can be mapped and prioritised, using householder perceptions of behavioural similarity to identify these potentially catalytic behaviours. Water managers can apply the findings to help select behaviours for demand management programs. Spillover researchers can use the catalytic behaviours to further explore spillover’s potential.