It was one person who tested him/herself against someone else on a test created by the original person. It did not involve several people. It could not be called a study.
There are no scientific studies on PhotoReading that have been published. One, which studied the brain's blood flow and eeg response to PhotoReading was not released because the sample was too small, and no funding was (is?) available to increase the sample size (the results were what we had expected). Another was done at one of our long term corporate clients to study the efficacy of the PhotoReading system--that one is private, and they are still a good client.