Development of intelligence and neuropsychological impairment scales for the Washington Psychosocial Seizure Inventory.

The Washington Psychosocial Seizure Inventory (WPSI) was used to evaluate the relative extent of psychosocial problems in 379 adults with epilepsy, having differing levels of intelligence and neuropsychological impairment. In general, there were more psychosocial problems when abilities were decreased. Two new scales for the WPSI were developed, one of which provides an index of intelligence and the other an index of neuropsychological impairment. When groups of patients are considered, these scales correlate well with the Wechsler Adult Intelligence Scale and with the Neuropsychological Battery for Epilepsy, respectively, but less well when there is consideration of individual cases. The uses and limitations of the new scales in research and clinical contexts are discussed.