31. A method for obtaining eye-fixation duration data or eye-fixation duration and location data for testing the attention allocation of a patient using an eyetracking system comprising at least one video camera and at least one computer that is configured to measure and record the patient's eye-fixation data, the method comprising: a. administering a single-task condition visual search task comprising: i. presenting the patient with a first multiple choice display containing a plurality of images wherein all of the images are identical except for a first target image that is different with respect to at least one image characteristic; and ii. instructing the patient to look at the different image; b. administering a single-task condition comprehension task comprising: i. presenting the patient with a first verbal stimulus; and ii. presenting the patient with a first visual stimulus comprising a plurality of images wherein one of the images is a second target image that corresponds to the first verbal stimulus; c. administering a dual-task comprising: i. instructing the patient to look at the different image and listen carefully to the words; ii. simultaneously presenting the patient with a second verbal stimulus and a second multiple choice display containing a plurality of images wherein all of the images are identical except for a third target image that is different with respect to at least one image characteristic; and iii. presenting the patient with a second visual stimulus comprising a plurality of images wherein one of the images is a forth target image that corresponds to the second verbal stimulus; d. measuring and recording eye-fixation duration data during steps a to c, wherein an eye fixation is a relatively stable position of the eye for a minimum duration of at least about 40 milliseconds with some slight tolerance in the vertical and horizontal dimensions; and e. analyzing the eye-fixation duration data to assess the patient's attention allocation.
37. The method in accordance with claim 31 , further comprising designing the visual stimuli to minimize the presence of distracting visual features.