Objectives: We acquired normative data for an Internet neurocognitive screening tool, the Cognitive Stability Index (CSI), and investigated its validity both for initial assessment and for detecting significant change.
Participants: Normative data on a nationally representative sample of 284 individuals aged 18 to 89. Validity data was obtained for outpatient groups of mild-to-moderate TBI, attention deficit/hyperactivity disorder (AD/HD), and Alzheimer's disease.
Results: The CSI subtests resolve to four factors: attention, processing speed, motor speed, and memory with acceptable psychometric properties. Patterns of scores obtained by three groups of patient-participants provided reasonable evidence of clinical validity for screening and monitoring change.
Conclusions: An Internet-based system holds promise for applying complex statistical models for routine monitoring of cognitive function.
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