intelligence and memory quotients were within normal limits. one of the experiments involving vp attempted to investigate systematically the types of visual information that could be transferred via vp's spared splenial fibers. the first experiment was designed to assess vp's ability to make between-field perceptual judgements about simultaneously presented pairs of stimuli. the stimuli were presented in varying positions with respect to the horizontal and vertical midline with vp's vision fixated on a central crosshair. the judgements were based on differences in colour, shape or size. the testing procedure was the same for all three types of stimuli; after presentation of each pair, vp verbally responded "yes" if the two items in the pair were identical and "no" if they were not. the results show that there was no perceptual transfer for colour, size or shape with binomial tests showing that vp's accuracy was not greater than chance. a second experiment involving vp attempted to investigate what aspects of words transferred between the two hemispheres. the set up was similar to the previous experiment, with vp's vision fixated on a central cross hair. a word pair was presented with one word on each side of the cross-hair for 150 ms. the words presented were in one of four categories: words that looked and sounded like rhymes (e.g. tire and fire), words that looked as if they should rhyme but did not (e.g. cough and dough), words that did not look as if they should rhyme but did (e.g. bake and ache), and words that neither looked nor sounded like rhymes (e.g. keys and fort). after presentation of each word pair, vp responded "yes" if the two words rhymed and "no" if they did not. vp's performance was above chance and she was able to distinguish among the different conditions. when the word pairs did not sound like rhymes, vp was able to say accurately that the words did not rhyme, regardless of whether or not they looked as if they should rhyme. when the words did rhyme, vp was more likely to say they rhymed, particularly if the words also looked as if they should rhyme. although vp showed no evidence for transfer of colour, shape or size, there was evidence for transfer of word information. this is consistent with the speculation that the transfer of word information involves fibres in the ventroposterior region of the splenium—the same region in which v.p. had callosal sparing. v.p. is able to integrate words presented to both visual fields, creating a concept that is not suggested by either word. for example, she combines "head" and "stone" to form the integrated concept of a tombstone. kim peek kim peek was arguably the most well-known savant. he was born on november 11, 1951 with an enlarged head, sac-like protrusions of the brain and the membranes that cover it through openings in the skull, a malformed cerebellum, and without a corpus callosum, an anterior commissure, or a posterior commissure. he was able to memorize over 9,000 books, and information from approximately 15 subject areas. these include: world/american history, sports, movies, geography, actors and actresses, the bible, church history, literature, classical music, area codes/zip codes of the united states, television stations serving these areas, and step by step directions within any major u.s. city. despite these abilities, he had an iq of 87, was diagnosed as autistic, was unable to button his shirt, and had difficulties performing everyday tasks. the missing structures of his brain have yet to be linked to his increased abilities, but they can be linked to his ability to read pages of a book in 8–10 seconds. he was able to view the left page of a book with his left visual field and the right page of a book with his right visual fields so he could read both pages simultaneously. he also had developed language areas in both hemispheres, something very uncommon in split-brain patients. language is processed in areas of the left temporal lobe, and involves a contralateral transfer of information before the brain can process what is being read. in peek's case, there was no transfer ability—this is what led to his development of language centers in each hemisphere. many believe this is the reason behind his extremely fast reading capabilities. although peek did not undergo corpus callosotomy, he is considered a natural split-brain patient and is critical to understanding the importance of the corpus callosum. kim peek died in 2009.