Discriminant validity of the Visual Motor Integration Test in screening children with handwriting dysfunction.

To examine the discriminant validity of the Visual Motor Integration test in screening children with handwriting dysfunction, 599 children in Grade 2, including 41 children with handwriting dysfunction identified by their teachers and 558 typically developing children, were assessed. The Visual Motor Integration test, with an area under the receiver operating characteristic curve (0.894), showed high accuracy regarding screening purposes. Judging from the values for sensitivity, specificity, positive likelihood ratio, negative likelihood ratio, hit rate, Youden's index, and odds ratio, a standard score of 85 was the best cutoff point for screening children for handwriting dysfunction.