As mentioned, UX is the overall experience that users form of a site. In all forms of interaction, humans make use of the ‘orienting reflex’. Explored most famously by the neuropsychologists Eugene Sokolov and Olga Vinogradova, it’s what enables us to make snap judgements about what we don’t understand. Therefore, this capability is ‘hard wired’ into our psychology and manifests as we encounter new things.