The left hand also showed signs of severe ideomotor apraxia. The speed and accuracy of grasping objects also appears unaffected by ideomotor apraxia. The lesions most associated with ideomotor apraxia are to the left parietal and premotor areas. This test is specifically designed for ideomotor apraxia. One of the defining symptoms of ideomotor apraxia is the inability to pantomime tool use. Patients with lesions to the supplementary motor area have also presented with ideomotor apraxia. There are a variety of brain areas where lesions have been correlated to ideomotor apraxia. These comorbidities can make it difficult to pick out the specific features of ideomotor apraxia. The motion of dowsing rods is now generally attributed to the ideomotor response. He argued that ideomotor effect could explain the phenomena of dowsing and table-turning. The ideomotor phenomenon is a psychological phenomenon wherein a subject makes motions unconsciously. Scientists explain the motion is due to the ideomotor effect. Scientists and skeptics consider automatic writing to be the result of the ideomotor effect. When individuals perform actions they learn what their movements lead to (Ideomotor learning). Ideomotor control supports selection and control of action, given intended outcomes.