• Young children's failure to report double-simultaneous stimulations of the side of the face and the contralateral hand has been attributed to cerebral deficiencies. When tested under optimal psychological conditions, 3- to 6-year-old childern correctly report simultaneous stimulations of the face and contralateral hand. Performance on the face-hand test, which has been used as an index of cerebral functioning, is influenced in a significant way by the child's ease in the testing situation and understanding of the task.
Nolan E, Kagan J. Psychological Factors in the Face-Hand Test. Arch Neurol. 1978;35(1):41–42. doi:10.1001/archneur.1978.00500250045010
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