[1] Univ Kebangsaan Malaysia, Fac Hlth Sci, Ctr Hlth Ageing & Wellness H CARE, Speech Sci Programme, Jalan Raja Muda Abdul Aziz, Kuala Lumpur 50300, Malaysia
[2] Texas Tech Univ, Dept Educ Psychol & Leadership & Counseling, Lubbock, TX 79409 USA
[3] Univ Kebangsaan Malaysia, Fac Hlth Sci, Speech Sci Programme, Kuala Lumpur, Malaysia
[4] Univ Kebangsaan Malaysia, Fac Hlth Sci, Ctr Rehabil & Special Needs Studies, Programme Clin Psychol & Behav Hlth, Kuala Lumpur, Malaysia
[5] Rockhurst Univ, Dept Commun Sci & Disorders, Kansas City, MO USA
[6] Edith Cowan Univ, Sch Med & Hlth Sci, Joondalup, WA, Australia
[7] Adelaide Univ, Sch Allied Hlth Sci & Practice, Adelaide, SA, Australia