THE EFFECTS OF ADHD ON FLUID INTELLIGENCE 1 Working memory and intraindividual variability mediate fluid intelligence deficits associated with ADHD symptoms ***ACCEPTED FOR PUBLICATION IN THE JOURNAL OF ATTENTION DISORDERS*** Christopher R. Brydges 1,2 , Krista L. Ozolnieks 2 , and Gareth Roberts 3 1 School of Psychological Science, the University of Western Australia 2 School of Psychology and Exercise Science, Murdoch University 3 School of Psychology, University of Sydney Corresponding author: Christopher R. Brydges School of Psychological Science Mailbag M304 University of Western Australia 35 Stirling Highway Crawley WA 6009 Phone: +61 (8) 6488 1404 Email: Chris.Brydges@colostate.edu Word count: 4,621