In our brain, we have two hemispheres. These hemispheres do not have the same functions. In patients, we know about their specialization because of lesion studies. In healthy participants, we perform lateralized half-field studies. In our laboratory, we are investigating which functions are lateralized to which hemisphere. In particular, we develop a lateralized lexical decision task usable in different languages, evaluate the right hemisphere’s language and spatial abilities, assess the link between personality, creativity and hemispheric asymmetry.