Incremental validity of WISC–IV factor index scores with a referred Irish sample: Predicting performance on theWIAT–II Gary L. Canivez*, Marley W. Watkins, Trevor James, Rebecca Good and Kate James Department of Psychology, Eastern Illinois University, Charleston, Illinois, USA Department of Educational Psychology, Baylor University, Waco, Texas, USA 3 Eirim: The National Assessment Agency, Ltd...