A method and system are presented to address quantitative assessment of verbal memory of a subject, where the method comprises the steps of: (1) presenting at least one scene to the subject on a display, the scene comprising a plurality of symbols and a background (2) moving the plurality of symbols relative to the scene, the movement being tracked by the subject via at least one input device (3) adjusting the saliency of the plurality of symbols relative to the tracked movement (4) increasing the number of said plurality of symbols (5) receiving feedback from the subject via said input device (6) quantitatively refining the received feedback (7) modulating the movement of the plurality of symbols relative to the accuracy of the quantitatively refined feedback (8) calculating a critical threshold parameter and (9) recording a critical threshold parameter onto a tangible computer readable medium.
