METHOD AND SYSTEM FOR QUANTITATIVE ASSESSMENT OF LETTER IDENTIFICATION LATENCY
A method is presented to address quantitative assessment of letter identification latency of a subject, where the method comprises the steps of: (1) presenting at least one scene to a subject on a display, the scene comprising a plurality of letters and a background; (2) moving the plurality of letters relative to the scene, the movement being tracked by the subject via at least one input device; (3) receiving feedback from the subject via the input device; (4) quantitatively refining the received feedback; (5) modulating the movement of plurality of letters relative to accuracy of the received feedback; (6) calculating a critical threshold parameter; and (7) recording a critical threshold parameter onto a tangible computer readable medium. An apparatus for quantitative assessment of letter identification latency of a subject comprising a display device, an input device, a control device, and a tangible computer readable medium. In its simplest sense, quantitative assessment profile of letter identification latency by psychophysical responses is generated on a tangible computer readable medium.
1 . A method for assessment of letter identification latency of a subject, said method comprising the steps of:
presenting at least one scene to said subject on a display, said scene comprising a plurality of letters and a background;
moving plurality of letters relative to said scene, said movement being tracked by said subject via at least one input device;
receiving feedback from said subject via said input device;
quantitatively refining said received feedback relative to said scene;
modulating said movement of plurality of letters relative to accuracy of said received feedback, said modulated movement associated with a predetermined target;
calculating a critical threshold parameter for said subject; and
recording said critical threshold parameter onto a tangible computer readable medium.
2 . The method of claim 1 , further comprising at least one of the additional steps of:
monitoring at least one response error from said subject; and
measuring said response error relative to a predetermined threshold.
3 . The method of claim 1 , wherein said plurality of letters further comprises a word in the English language.
4 . The method of claim 1 , wherein said plurality of letters further comprises a non-word in the English language.
5 . The method of claim 1 , wherein said plurality of letters further comprises false-fonts.
6 . The method of claim 1 , wherein said plurality of letters further comprises alternating letters of the same color.
7 . The method of claim 1 , wherein said plurality of letters further comprises alternating letters of the same contrast.
8 . The method of claim 1 , wherein said plurality of letters are at least one of the following:
inverted;
flipped;
mirrored; and
rotated.
9 . The method of claim 1 , wherein said movement is discontinuous.
10 . The method of claim 1 , wherein said movement is continuous.
11 . The method of claim 1 , wherein said movement is associated with change in velocity.
12 . The method of claim 1 , wherein said movement is associated with a random location on said scene.
13 . The method of claim 1 , wherein said movement is associated with a predetermined time period.
14 . The method of claim 1 , wherein said movement is associated with a predetermined angular degrees.
15 . The method of claim 1 , wherein said movement is associated with a predetermined mathematical relationship.
16 . The method of claim 1 , wherein said plurality of letters are moved in unison.
17 . The method of claim 1 , wherein said quantitative refinement is associated with saliency.
18 . The method of claim 1 , wherein said critical threshold parameter is implemented in a different functional impairment assessment test.
19 . An apparatus for quantitative assessment of letter identification latency of a subject comprising:
a display for presenting a scene comprising a plurality of letters and a background;
an input device for tracking movement from said subject;
a control device, said control capable of performing the following steps:
moving plurality of letters relative to said scene, said movement being tracked by said subject via at least one input device;
receiving feedback from said subject via said input device;
quantitatively refining said received feedback relative to said scene;
modulating said movement of plurality of letters relative to accuracy of said received feedback, said modulated movement associated with a predetermined target; and
calculating a critical threshold parameter for said subject; and
a tangible computer readable medium for recording said critical threshold parameter.
20 . A tangible computer readable medium, said tangible computer readable medium containing instructions comprising the steps of:
presenting at least one scene to said subject on a display, said scene comprising a plurality of letters and a background;
moving plurality of letters relative to said scene, said movement being tracked by said subject via at least one input device;
receiving feedback from said subject via said input device;
quantitatively refining said received feedback relative to said scene;
modulating said movement of plurality of letters relative to accuracy of said received feedback, said modulated movement associated with a predetermined target; and calculating a critical threshold parameter for said subject.