Three fundamental and standardized tests were used to conduct this survey. The first of them is the National Adult Reading Test, which is a commonly used and generally accepted test used in a neurophysiological clinical setting to determine intelligence levels in patients who have been diagnosed with dementia. The Symbol Digits Modalities Test is another test used by the University in their study. This test is normally used to assess the level of brain damage that has resulted from severe injury or diseases and is said to be able to detect cognitive impairment in less than 5 minutes. The last type of test that they used is also frequently used in neuroscience research labs and can be categorized as a memory test.