sentence: Following this point of view it is not surprising that synesthetes also show differences in multisensory processing not only restricted to the inducer-concurrent sensory modalities ( Brang et al ., 2012 ; Neufeld et al ., 2012c ; Sinke et al ., 2012b ) and that these differences are similar for both grapheme-color and audio – visual synesthetes ( Neufeld et al ., 2012c ; Sinke et al ., 2012b ) indicating common sensory effects for different synesthesia phenotypes .