Results provide empirical support for the efficacy of online delivery of the Cool Little Kids program. Online dissemination may improve access to an evidence-based prevention program for child anxiety disorders. Clinical trial registration information-Randomised Controlled Trial of Cool Little Kids Online: A Parenting Program to Prevent Anxiety Problems in Young Children; http://www.anzctr.org.au/; 12615000217505.

BackgroundAnxiety disorders are the most common type of mental health problem and begin early in life. Early intervention to prevent anxiety problems in young children who are at risk has the potential for long-term impact. The ‘Cool Little Kids’ parenting group program was previously established to prevent anxiety disorders in young children at risk because of inhibited temperament. This group program was efficacious in two randomised controlled trials and has recently been adapted into an online format. ‘Cool Little Kids Online’ was developed to widen and facilitate access to the group program’s preventive content. A pilot evaluation of the online program demonstrated its perceived utility and acceptability among parents. This study aims to evaluate the efficacy of Cool Little Kids Online in a large randomised controlled trial.Methods/DesignParents of young children who are 3–6 years old and who have an inhibited temperament will be recruited (n = 385) and randomly assigned to either immediate access to Cool Little Kids Online or delayed access after a waiting period of 24 weeks. The online program contains eight modules that help parents address key issues in the development of anxiety problems in inhibited children, including children’s avoidant coping styles, overprotective parenting behaviours, and parents’ own fears and worries. Intervention participants will be offered clinician support when requested. The primary outcome will be change in parent-reported child anxiety symptoms. Secondary outcomes will be child internalising symptoms, child and family life interference due to anxiety, over-involved/protective parenting, plus child anxiety diagnoses assessed by using a new online diagnostic tool. Assessments will take place at baseline and 12 and 24 weeks after baseline.DiscussionThis trial expands upon previous research on the Cool Little Kids parenting group program and will evaluate the efficacy of online delivery. Online delivery of the program could result in an easily accessible evidence-based resource to help families with young children at temperamental risk for anxiety disorders.Trial registrationAustralian New Zealand Clinical Trials Registry 12615000217505 (registered 5 March 2015)Electronic supplementary materialThe online version of this article (doi:10.1186/s13063-015-1022-5) contains supplementary material, which is available to authorized users.

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Background The Online Assessment of Preschool Anxiety (OAPA) is a newly developed measure that assesses anxiety disorders in preschool children aged 3–6 years. This study aimed to explore the OAPA's initial psychometric properties with a particular focus on examining its construct validity, both convergent and discriminant. Method The OAPA was completed online by a community sample of 319 Australian parents of temperamentally inhibited preschool children (M: 5.3 years). Preliminary diagnoses were automatically generated before assessment reports were reviewed by a psychologist. Construct validity was examined by assessing the degree of agreement between the OAPA and existing valid questionnaire measures that were simultaneously administered online. Results Nearly half of participants met criteria for a child anxiety disorder according to the OAPA, most commonly social phobia. Findings supported convergent validity with the Revised Preschool Anxiety Scale (an anxiety symptom measure), the Children's Anxiety Life Interference Scale – Preschool Version (a measure of life interference from anxiety), the Emotional Symptoms scale of the Strengths and Difficulties Questionnaire‐Parent Version (a measure of broader internalizing symptoms), as well as an over‐involved/protective parenting scale. Findings also supported initial discriminant validity with the Conduct Problems scale of the Strengths and Difficulties Questionnaire‐Parent Version. Conclusions Results of this study provide evidence for the OAPA's preliminary construct validity. With further research into the OAPA's reliability (test–retest and interrater) and confirming construct validity, the OAPA may be a useful instrument for use in research settings and clinical practice.