What is Oppositional Defiance Disorder (ODD)?
Most children argue, refuse instructions, test boundaries, become angry when things do not go their way, and occasionally blame others for their mistakes. These behaviours are a normal part of development. ODD is different because the pattern is more frequent, intense, and persistent than would typically be expected for a child’s age and stage of development. ODD describes a long-standing pattern of angry, irritable, argumentative, and defiant behaviour that has a significant impact on relationships and daily functioning. The Diagnostic and Statistical Manual of Mental Disorders (DSM-5) states that emotional and behavioural symptoms must be present for at least six months before a diagnosis can be given.
What Does ODD Look Like?
Children and young people with ODD may:
- Frequently lose their temper, becoming easily annoyed or irritated
- Argues with adults / authoritative figures
- Refuse to follow rules or requests
- Seemingly deliberately annoy others
- Blame other people for their mistakes or problems
- Appear resentful or angry and seek revenge at others following conflict
Importantly, these behaviours are often most evident with familiar adults such as parents, carers, and teachers rather than with strangers.
What Causes ODD and How Common is it?
There is no definitive cause of ODD, but it is likely that a combination of inherited and environmental factors may lead to an ODD diagnosis, including genetics (e.g., temperament and neurobiological differences) and environmental factors (e.g., parenting style or family discord).
Estimating the prevalence of ODD is difficult because studies use slightly different definitions and assessment methods. Current research suggests that around 3-5% of children and young people meet criteria for ODD at any given time, making it one of the more common behavioural and mental health conditions in childhood. European research has reached similar conclusions, suggesting that ODD is not a rare condition and is seen across different countries and cultures. To put this into context, in an average primary school of 300 pupils, there may be around 9 to 15 children experiencing difficulties consistent with ODD.
ODD and Neurodiversity
One reason ODD has become such a debated diagnosis is that it frequently occurs alongside other forms of neurodivergence. ODD often occurs alongside ADHD, anxiety, depression, or conduct disorders, with research consistently showing strong links between ODD and ADHD. Many children who meet criteria for ODD also experience difficulties with impulsivity, emotional regulation, frustration tolerance, and executive functioning. Similarly, some autistic children may be described as oppositional when they are actually struggling with anxiety, sensory overload, rigid thinking, communication differences, or demands that exceed their capacity in that moment.
In terms of supporting young people and children with ODD, we have a training course on neurodiversity which specifically looks at ODD and how we can support anger and the development of self-regulation in school settings. This training course is written and delivered by Educational Psychologist, Dr. Eleanor Tomlinson.
