Final Report Summary - MULTISENSE (Lifespan Development of Typical and Atypical Multisensory Perception)
MULTISENSE looked at both the lower and upper ends of the lifespan, asking too how synaesthesia changes in older age. They found that synaesthesia becomes less stable in older people, and that synaesthetic colours become greyer and darker. These changes make synaesthesia less prominent in older age, and in turn make older synaesthetes more difficult to identify. However, older people who maintain their synaesthesia benefit from their experiences: they have superior memory recall compared to people of the same age without synaesthesia. To understand why people develop synaesthesia the MULTISENSE project asked whether the trait was found equally in men and women, whether it shared biological features with other conditions, and whether cross-sensory mapping itself was a uniquely human trait. Here, they looked more widely at experiences resembling synaesthesia in the population at large. The found that all people tend to adopt multisensory associations from their environment: for example, children exposed to coloured counting blocks who internalise the colours can improve their sense of numerosity. And multisensory information can even affect taste: rougher foods taste more sour than smooth foods, and even the shape of plates can alter the bitterness of the food served on them. In summary, the MULTISENSE project explored how the senses come to be integrated in people with and without synaesthesia, and how this integration takes place in children and older people. The MULTISENSE project aimed to celebrate sensory differences by recognising neurological variation as a valuable feature within the natural diversity of humans.