Psychological correlates of psychogenic seizures.

Psychological correlates of psychogenic seizures were studied. The MMPI, Portland Digit Recognition Test (PDRT; a forced choice measure of motivation), disability status, Face-Hand Test, and Finger Agnosia were compared in 53 patients with medically intractable seizure disorders who underwent intensive EEG monitoring. Using conventional neurologic criteria, 64% had diagnoses of epileptic seizures (ES) and 36% had psychogenic seizures (PS). PS patients were significantly higher in number of somatoform MMPI profiles and likelihood of applying for financial benefits, and significantly lower on the PDRT. PS patients made more Finger Agnosia errors. Differences on the Face-Hand Test were of borderline significance. The results support the existence of multiple psychometric correlates of PS.