What is "crossmodal"

a. Across or between more than one mode.

Crossmodal perception or cross-modal perception is perception that involves interactions between two or more different sensory modalities. Examples include synesthesia, sensory substitution, and the McGurk effect, in which vision and hearing interact in speech perception.

Crossmodal perception, crossmodal integration and crossmodal plasticity of the human brain are increasingly studied in neuroscience to gain a better understanding of the large-scale and long-term properties of the brain. A related research theme is the study of multisensory perception and multisensory integration.