This guest presentation provides an overview of the link between industrial design, perception and semantics. It describes the origins of Industrial design and definition of the core purpose of design to realise and communicate and influence the perception of value through an artifact, product, or service. It then provides a link between the mechanisms of perception and assignment of value or meaning to a design intervention. How designers may influence the viewer to reframe their perception and assignment of meaning and value to change their behaviour is also discussed alongside the ethics and responsible application of this process. Metrics of efficacy are also discussed.