In the absence of effective and appropriate supports, the many unique challenges faced by families of children with disability are likely to be exacerbated. Telehealth technologies offer a promising service-delivery model for disseminating parenting interventions in an accessible, timely and convenient manner with research indicating comparable outcomes between telehealth-based and conventional face-to-face programmes.Regardless of these encouraging findings, few empirically-validated parenting programmes are available in a telehealth delivery modality, with even fewer interventions specifically targeting, and/or including, adaptations to meet the specific needs of parents and caregivers of children with a disability.The primary aim of the current study is to develop and investigate the efficacy of a telehealth-based parenting intervention for parents of children with a disability. The acceptability of and parent satisfaction with the developed intervention will also be examined as a secondary outcome of the research. Chapter 1 of this dissertation provides a brief overview of the pertinent issues impacting upon the research field and provides a rationale for the current research.Chapter 2 is a systematic review of the literature in relation to online/telehealth parenting interventions for parents of children with an intellectual or developmental disability. The systematic review was undertaken between October 2013 and April 2014.Eight articles met inclusion criteria; reporting on five trials (three RCTs and two pre-post).All five studies used standardised parent-reported measures of child behaviour. The review provides preliminary evidence as to the efficacy of telehealth-based delivery of programmes in this population, however the small number of studies available and the restricted areas of disability investigated (TBI and FASD), indicates that this is currently a very limited field of research.Chapter 3 details a qualitative inquiry as to the telehealth-related consumer preferences of parents and carers of children (aged 0-17 years) with mixed disabilities. The survey investigated parents' access to and use of the internet, degree of comfort with a range of online and telehealth-based technologies, the acceptability of online parenting training to this population and preferences in relation to potential delivery modalities and supports.Results were used to inform the development of a telehealth-based parenting intervention for this population.iii Chapter 4 provides the protocol of a randomised controlled trial (RCT) of a novel telehealth-based parenting programme for parents and carers of children (aged 2-12 years) with a disability. The theoretical basis, study hypotheses, methods and planned analyses for this protocol are described.Chapter 5 is a manuscript accepted for publication with Research in Developmental Disorders, and reports on the results of the RCT conducted. Ninety-eight parents were randomly assigned to either the telehealth intervention (Triple P Online-Disability) or a control condi...