Divided visual field paradigm

Because the center of the visual field, the fovea, may project bilaterally to both RH and LH,[4] lateralized stimuli should appear sufficiently far from fixation.

[2] A free software tool called the "Lateralizer" has been developed for piloting and conducting customizable experiments using the divided visual field paradigm.

[6] A significant difference between RVF/LH and LVF/RH task performance using the divided visual field paradigm does provide evidence of a functional asymmetry between the two cerebral hemispheres.

It would require a leap of faith to assume that there is a straightforward mapping between lateralizing a stimulus and producing disproportionate activation throughout the contralateral hemisphere.

Moreover, the divided visual field technique represents a relatively coarse and indirect method for localizing brain regions associated with cognitive function.