The experiment tested the hypothesis that psychogenic vertigo is an anxiety equivalent rather than an anxiety concomitant. The authors hypothesize that for the patient with psychogenic vertigo, an experience of anxiety is displaced onto the dizziness. In this way, the source of the unpleasurable experience is seen to be something in the environment, rather than within the individual, and therefore feelings of helplessness are mitigated. The subjects were twenty-three patients from a Swedish ENT clinic with presumed psychogenic vertigo. They were matched for sex, age, education, and occupation with a control group selected from paid volunteers. The experiment utilized "percept-genetic" techniques and spiral after-effect measurements. The tests indicated anxiety in significantly more vertigo patients than in the controls. After further analysis