Detecting hysterical sensory symptoms: an elaboration of the forced choice technique.

Patients with hysterical sensory symptoms can often be detected because they give significantly fewer correct responses with forced choice testing than would be expected on a chance basis. It is always possible that such a patient may see through this strategy and respond within the range associated with chance. This report describes one such subject together with an elaboration of the forced choice technique which strongly indicated that his symptoms had no organic basis.