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Attention-Deficit Hyperactivity Disorder (ADHD) is a complex neurodevelopmental disorder associated with significant social, academic, and family functioning impairment, making it the most prevalent psychiatric disorder in childhood (Vacher et al., 2020; Verret et al., 2016). Common symptoms of ADHD include irritability, low frustration tolerance and affect instability, alongside chronic emotion regulation dysfunction (D’Ambrogio & Speranza, 2012). Indeed, ADHD has been frequently associated with emotional dysregulation. The prevalence of moderate emotional dysregulation co-occurring with ADHD is around 25% and severe emotional dysregulation co-occurring with ADHD is 50%(Shaw et al,. 2014; Sobanski et al,. 2010). Furthermore, environmental factors, including parenting seem to play a key role in the manifestation of emotional dysregulation symptoms, ie, children with high levels of emotional dysregulation symptoms could be less sensitive to parents’ discipline, making them more prone to use negative parenting practices over time.(Caro-Cañizares et al., 2015). A recent study from Muratori et al.,(2022) indicated that negative parenting is a risk factor for emotional dysregulation, yet there is a need for future studies to better explore the mechanisms underpinning these associations. The present study seeks to investigate the following:(a) the moderating role of ADHD symptoms in explaining the associations between parenting practices and emotional arousal symptoms, cross-sectionally, at age 7 and age 9 and (b) the mediating role of emotional arousal symptoms in explaining the associations between ADHD symptoms and conflict …