The efficacy of cognitive-behavioural therapy (CBT) in the treatment of child anxiety disorders has been well established in the literature, with on average, just over 50% of children becoming free of their primary anxiety diagnosis immediately following treatment (James et al., 2008). Despite the existence of these efficacious treatments, up to two thirds of children with anxiety do not receive assistance for their difficulties (Essau et al., 2002). The reasons for this are varied, and include lack of available therapists or services, long waiting lists, high therapy costs and stigma associated with therapy. Computer- and internet-based interventions represent a modern alternative for delivering CBT interventions that may be more appealing and accessible to a greater proportion of children with anxiety. Various forms of computer-assisted therapies have been investigated, including palmtop computers, desktop computers, virtual reality and online programs. Although computerised interventions have demonstrated promise in the treatment of adult anxiety, they have only recently received interest in the child literature. Specifically, there are very few controlled trials evaluating the efficacy of computer- and internet-based interventions for childhood psychological disorders, including anxiety disorders. The present research involved the initial development and subsequent testing of an entirely internet-based, CBT intervention for child anxiety disorders. BRAVE-ONLINE was developed as an internet adaptation of The BRAVE Program, a clinic-based program which has demonstrated efficacy in the treatment of childhood anxiety. The online intervention is a therapist-mediated program, in which children and parents receive email and telephone assistance from a therapist throughout treatment. BRAVE-ONLINE is an interactive program consisting of 10 child and 6 parent sessions to be completed by families in their own home. Following the development of BRAVE–ONLINE, the first study of this thesis included a randomised control trial to investigate the efficacy of the internet-based intervention (NET) compared to a waitlist control (WL). Seventy-three children aged between 7 and 12 years, diagnosed with separation anxiety disorder, social phobia, generalised anxiety disorder or specific phobia were randomly allocated to NET and WL conditions. Treatment effects were evaluated at 10-14 weeks post-assessment and 6-month follow-up, using multiple outcome measures including a diagnostic interview, clinician ratings of severity, parent and child questionnaires. Results indicated that at post-assessment, 30% of NET participants in the completer sample (22.5% in the Intent-to-Treat (ITT) sample) no longer met criteria for their primary anxiety diagnosis, compared to 10% of WL participants. Significant gains were also evident for clinician severity ratings, global assessments of functioning, and several questionnaire measures. However, results also indicated that children and parents were slow to progress through therapy, such that a large proportion of families had not completed all treatment sessions at the post-assessment point. For this reason, 6-month follow-up may present a better indication of treatment efficacy. Indeed, at 6-month follow-up, treatment gains were improved upon such that 75% of children in the completer sample (52.5% in the ITT sample) no longer met criteria for their primary anxiety disorder. Reductions in severity ratings, global assessments of functioning and child and parent self-report measures were also improved upon at 6-month follow-up. Further, the online intervention was found to be highly acceptable to families and was associated with only minimal rates of attrition. The second study of this thesis aimed to explore factors associated with treatment outcome for the online intervention. Factors of interest included demographic factors (age, gender, income and educational background), treatment expectancy, initial symptom severity, program compliance and pre-treatment diagnostic comorbidity. Specifically, this study investigated the extent to which each of these factors predicted the improvement made by children on global assessments of functioning (CGAS) at 6-month follow-up. Results indicated that only some of these factors were directly associated with treatment outcome. Although treatment expectancy predicted compliance with the program, it was not associated with treatment outcome. Baseline severity also did not predict treatment outcome. Contrary to expectation, levels of program compliance by children negatively predicted outcome, such that children who were more compliant with the program showed fewer improvements in overall functioning. Parent compliance did not predict treatment outcome. A significant relationship was evident between diagnostic comorbidity (number of pre-treatment anxiety diagnoses) and treatment outcome, such that higher baseline comorbidity predicted poorer functioning on the CGAS at 6-month follow-up. None of the demographic factors were associated with treatment outcome. Overall, the findings of this research suggest that a CBT intervention delivered entirely over the internet was associated with reductions in indicators of anxiety at post-assessment, compared to a WL control, particularly for the completer sample. Further, these reductions were improved upon at 6-month follow-up, with a substantial proportion of children becoming free of their primary anxiety diagnosis. The results also indicated that the online intervention might not be as effective for children suffering from multiple anxiety disorders. The effects of program compliance were somewhat surprising and possible explanations are offered. Although these results are promising, conclusions should be regarded as tentative until further trials are conducted and the online intervention is compared with clinic-based treatments. Limitations of this research and areas for future research are discussed.
| Identifer | oai:union.ndltd.org:ADTP/254183 |
| Creators | Sonja March |
| Source Sets | Australiasian Digital Theses Program |
| Detected Language | English |
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