I scored an 8 on the reverse digit span test. and an 11 on the forward. also top score on the memory impairment screen. do i have mci? i'm 22

No MCI at this time: The screening test results indicate that you currently do not have mild cognitive impairment, or worse, dementia. Serial screening will help to determine whether you develop cognitive dysfunction in the future. Maintain brain health now with diet, exercise, reading, and avoiding head trauma and unhealthy habits (drugs, smoking, etc). http://www.alz.org/dementia/mild-cognitive-impairment-mci.asp

No- not MCI: These tests were not really designed for a 22 year old, and these tests are just screening tests, not complete tests of cognitive ability. That being said, your history, intellectual function and scores on a complete battery of cognitive tests should help to answer your question. Hope that helps!

Depends: There are many types of MCI. One can have problems, lets say, with just visual spatial processing and visual memory exceeding 1.5 standard deviations below expectation and have intact verbal memory and frontal executive function. If you are saying that you can repeat a string of 11 numbers presented 1 second apart in a monotone voice you are doing much better than average ( seven plus or minus 2)