A recent research reveals a novel antecedent of psychological ownership: smell. Ruta Ruzeviciute (University of Amsterdam), Bernadette Kamleitner (WU Vienna University of Economics and Business) and Dipayan Biswas (University of South Florida) examined the effect of scented advertising on product appeal. They found that scented as opposed to non-scented advertising increases product appeal. Interestingly, the authors found that the mechanism accounting for this effect is a sense of proximity induced by scent, which in turn increases psychological ownership. In other words, when people smell a scented (vs. non-scented) ad, they like the advertised product more because they experience it as being closer to them and more ‘theirs’. These findings add to the literature on proximity as an antecedent of psychological ownership implying that it is not only through direct contact and touch that people can experience psychological ownership, as prior research has shown; smell can also induce psychological ownership through its ability to represent the essence of an object that is not physically present.
You can read more about this research here.