The Symbol Digit Modalities Test is a simple, economical test is an ideal way for busy clinicians to screen for organic cerebral dysfunction in both children and adults. Brief, easy to administer, and much less expensive than neuropsychological test batteries, the SDMT has demonstrated remarkable sensitivity in detecting not only the presence of brain damage, but also changes in cognitive functioning over time and in response to treatment. The SDMT involves a simple substitution task that normal children and adults can easily perform. Using a reference key, the examinee has 90 seconds to pair specific numbers with given geometric figures. Responses can be written or oral, and for either response mode, administration time is just 5 minutes. The WPS AutoScoreTM Test Form simplifies scoring. Because examinees can give written or spoken responses, the test can be used with almost anyone, including those with motor disabilities or speech disorders.