• Fluency disorders
• Voice disorders
• Literacy acquisition patterns, teaching strategies in Deaf Education.
• Special needs in Education.
• Supported Employment.

• T. Wijesinghe, (2010) Education and training in two nations: Sri Lanka and the United States., Perspectives on Issues in Higher Education, ASHA, Division 10, Vol.13(01), p18-21.

 Conference Proceedings (Oral & Poster Presentations)

• T. Wijesinghe, E.I. Perera, S. Nakkawita , S. Wijenyake and S. Van Eyck ,'Developing culturally relevant, low cost therapy materials in an under-resourced country', ASHA Convention- 2016, Philadelphia, PA, USA, Poster presentation, presented 11/2016.
• E. I. Perera and T. Wijesinghe, ‘Supported Employment and Sri Lanka: setting up a ten year plan’, ASHA Convention 2016, Philadelphia, PA, USA., Poster presentation, presented 11/2016.
• T.M. Wijesinghe and E. I. Perera, 'Changing a ‘No service provision’ status in an under-resourced country: Establishing service delivery in Education', ASHA Convention 2015, Denver,CO, USA.,Poster presentation, presented 11/2015
• N.R. de Silva, B. Shadden, F. Hagstrom, J. H. de Silva, A. R. Wickramasinghe, S. Hetiarachchi, T.M.Wijesinghe, S.Ratanayake and E.I.Perera, (2013) ,'Developing the Speech-Language Therapy Profession In Sri Lanka: International Collaborations', ASHA Convention,2013, Chicago, IL, USA, Oral presentation, presented 11/2013.

• T. Wijesinghe, E. I. Perera, B. Shadden, 'Developing a narrative assessment tool for Sinhala speaking children through cross cultural collaboration: The process and the product',(2012), 13th Research Symposium, University of Kelaniya, Sri Lanka., Oral Paper presentation, Presented 11/2012.
• T.M. Wijesinghe, B. Shadden, E. I. Perera, 'Children's narrative tool assessment: From Classroom to Clinic Through International Collaboration', (2010), ASHA Convention 2010, Philadelphia, USA.,Poster, presented 11/2010.