Photographic memory
Around 1970, Charles Stromeyer studied his future wife, Elizabeth. He claimed that she could recall poetry written in a foreign language which she did not understand. She could remember the poetry years after she had first seen the poem. She also could, apparently, recall random dot patterns so as to combine two patterns into a stereoscopic image. She is the only person who is known to have passed such a test. The methods used in the testing procedures were not clear. Additionally, the tests have never been repeated (Elizabeth has consistently refused to repeat them). This raised further concerns, and increased skepticism about whether photographic memories were real.