ABSTRACT
This chapter reviews some experiments that reveal significant differences between the L-mind and R-mind, with the R-mind generally superior. These experiments show that the development of language in the left hemisphere has resulted in the loss of some visual processing abilities in that hemisphere. The areas of the brain previously devoted to these aspects of visual processing have been co-opted for language processing. But the development of language has also changed how visual memories are stored in the left hemisphere. One reason for the poorer performance of the left hemisphere in these tests is the loss of some of the areas previously used for visual processing to language processing. But another factor is the development of an additional function that is unique to the left hemisphere. The interpreter module was first identified by Michael Gazzaniga and his colleagues through a picture association test.
