1. Faculty of Health Sciences, Centre for Rehabilitation & Special Needs, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia,
2. Department of Special Education and Communication Disorders and Department of Biological Systems Engineering, Center for Brain, Biology and Behavior, University of Nebraska, Lincoln, NE, USA,
3. Communication Neuroscience Laboratories, University of Nebraska, Lincoln, NE, USA, and
4. Department of Educational Psychology and Leadership, Institute for Measurement, Methodology, Analysis and Policy (IMMAP), Texas Tech University, Lubbock, TX, USA