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