<prompt> Immediate memory is tested by:-Digit span forwardDigit span backwardSubtraction test 20-1Subtraction test 100-7  <response>: Immediate memory is usually tested by digit repetition test. Usually digit repetition forward is used however digit repetition backward is also used by some examiners, though its not the preferred technique. Reference Strub and Blacks The mental status examination in neurology Digital repetition forward upto score of 5 and Digital repitition backward upto 4 is considered normal. 