Understanding Neurodevelopmental Conditions in Adopted and Fostered Young People

Online Webinar
Wednesday 13 August 2025
20:00-21:00

Over 130 parents and professionals attended the talk presented by Dr Tom Cawthorne and Dr Matt Woolgar

About the Event

 Questions & Answers

There were so many interesting questions and comments raised in the chat during our webinar that we didn’t have time to address them all. We have therefore reviewed the chat, drawn out the main themes, and offered some responses below. These may not be definitive answers, and not everyone will agree, but where possible we have included supporting evidence.

Comments

Webinar Notes

Understanding Neurodevelopmental Conditions in Adopted and Fostered Young People

Introduction

  • Adopted and fostered children experience disproportionately high rates of neurodevelopmental conditions such as autism spectrum disorder (ASD) and attention deficit hyperactivity disorder (ADHD).

  • This webinar explored the nature of these conditions, the complexities of diagnosis in care experienced populations, and the implications for support and intervention.

Neurodiversity and Neurodivergence

Neurodiversity refers to the natural variation in human brain functioning and associated behavioural traits. It challenges the assumption that there is a single “normal” neurological profile, recognising a spectrum of cognitive and behavioural differences as part of human diversity.

Neurodivergence describes instances where neurological functioning diverges sufficiently from the majority, the neurotypical profile, to be considered atypical. Examples include autism, ADHD, dyspraxia, tic disorders, and others.

Key points

  • Neurodevelopmental differences are dimensional, not categorical.

  • Boundaries between “typical” and “atypical” are often fuzzy.

  • Assigned diagnoses may vary across different assessments due to overlapping symptoms and lack of rigid cut offs, and also because being adopted or care experienced can draw the assessor away from the data and offer an easy alternative explanation, for example “attachment”.

A neurodiversity approach enables inclusion

People with autism often follow their own norms for eye contact, which may diverge from many social norms, see also cultural variations.

  • Look to others when talking, look away when listening, which frustrates some norms.

  • Possibly to concentrate on additional social communication task demands without distractions.

  • In any case, what is considered “appropriate” eye gaze is culturally varied. Direct eye gaze can be disrespectful in some contexts.

  • Adopting a framework that combines principles of neurodiversity and rigorous scientific methods is essential for reframing social cognition to include the strengths of autistic people and to create new definitions for understanding autism specific communication and interaction.

  • This will allow us to move beyond deficit based accounts of autism that have historically dominated the field of research, Fletcher Watson and Happé, 2019. Offering empirical support for the idea of difference, not deficit, will contribute to the progression of the rights of autistic people and will have important implications for practice and the public understanding of autism, Cage, Di Monaco, and Newell, 2019, p650.

Attention deficit hyperactivity disorder, ADHD

Symptom clusters

  1. Inattention

  2. Hyperactivity and impulsivity

  3. Combined presentation

Diagnostic features

  • Symptoms must be persistent, more than 6 months, present in multiple settings, and evident from early development.

  • Prevalence is about 5 percent in UK children, but much higher in children looked after, CLA, with some studies showing more than 50 percent.

  • Rates also differ across countries, typically higher in the US but lower in Scandinavia. Are these real differences or different approaches

ADHD assessment

  • Developmental history via caregiver interviews.

  • Reports from multiple settings, for example school.

  • Questionnaires, for example Conners, home, school, and self report, and neuropsychological testing can be very helpful but are usually not necessary.

Autism spectrum disorder, ASD

Diagnostic criteria, ICD 11 and DSM 5

Autism is characterised by

  • A Persistent difficulties with social communication and social interaction.

  • B Restricted, repetitive, and inflexible patterns of behaviour, interests, or activities.

All subtypes, for example Asperger’s and PDD NOS, are now classified under a single umbrella, Autism Spectrum Disorder. It is a unitary concept, varying in terms of severity and impact.

Terminology and identity

  • The preferred term is currently “autistic person”, but always ask individual preference.

  • Language reflects values, “difference, not deficit”, which aligns with neuroaffirmative principles.

Neuroaffirmative approaches

  • Celebrate strengths and diversity rather than framing autism as a disorder to fix.

  • Recognise that challenges often arise from societal inaccessibility rather than inherent pathology.

  • Neuroaffirmative approaches exist on a spectrum

    • Some reject all interventions for autism, locating the pathology in a society that needs to change for failing to embrace diversity fully.

    • Others accept that society ought to change, but in the meantime offer interventions collaboratively based on building strengths and identifying barriers to wellbeing for this individual and their family.

  • Adapt interventions collaboratively with the individual and family.

Autism assessments

  • Gold standard has at least two parts

    • Structured observation, ADOS 2, plus developmental interview, ADI R, 3Di, DISCO.

  • Multiple informants, for example parents and teachers, are essential.

  • Ideally, co occurring conditions, anxiety, ADHD, intellectual disability and daily living skills, should also be assessed.

  • A challenge for some adopted children and CLA is that there are areas of interest about language acquisition or delay and the emergence of social reciprocity, imagination and play that normally occur between 2 to 5 years. Easier if this history is available, but not impossible even so.

Prevalence of autism

  • Prevalence is about 1 percent nationally but almost 3 percent in 10 to 14 year olds, and rising

  • Is autism overdiagnosed, Fombonne, 2023

    • “At a population level, the unjustified use of intensive services raises concerns about equity and fairness in services access for children who have neurodevelopmental disorders other than autism and struggle to access support services that they need as much as their peers with ASD.” p713

    • “The complexities, costs, and resources involved in diagnostic confirmation are considerable, justifying the calls for streamlined diagnostic procedures in clinical settings and rapid phenotyping in large scale studies. Yet, while lighter instrumentation and a compressed diagnostic evaluation or confirmation process may be needed, or indeed be the only available option, investigators should keep in mind the risk of overdiagnosis of ASD and devise measurement strategies that limit misclassification and false positives.” p713

    • Is a two day ADOS training sufficient to make a tester also an effective diagnostician

The neurodivergent spectrum and assessment

  • Using the example of autism, but similar ideas for ADHD too, the distribution of symptoms is on a continuum or spectrum, rather than a sudden step change from diagnosis absent to diagnosis present.

The spectrum is unlikely to be a perfectly symmetrical bell curve. The study below is an example of one way of mapping symptoms.

  • The distribution of symptoms here is heavily skewed towards the neurotypical end, to the left, with a bimodal distribution, a bump to the right, and it also looks different for males and females.

  • So when we are making a diagnostic decision as to whether someone meets or does not meet criteria, the boundaries, red lines, are not fixed and could be a bit fuzzy.

Diagnostic diversity, fuzziness

  • The graphs above show that there can be a fuzzy area in which neurodiversity becomes divergent or atypical which leads to diagnosis.

  • The fuzzy area is real and inevitable because of neurodiversity.

  • There is not a hard and fast cut off for some children and young people.

  • Some adopted young people in the fuzzy area get assigned to different bins, categories, labels, diagnoses, in different assessments.

  • First assessment equals autism, second equals ADHD, third neither, attachment and trauma.

  • There is often high comorbidity with other neurodevelopmental and non neurodevelopmental conditions, which can further blur the picture.

Autism

  • Lai et al, 2019

    • ADHD, 28 percent

    • Anxiety disorders, 20 percent

    • Sleep wake disorders, 13 percent

    • Disruptive, impulse control, and conduct disorders, 12 percent

    • Depressive disorders, 11 percent

    • Obsessive compulsive disorder, 9 percent

    • Bipolar disorders, 5 percent

    • Schizophrenia spectrum disorders, 4 percent

  • Seventy percent have at least one co occurring disorder, 41 percent have two or more. Anxiety, 42 percent, ADHD, 28.2 percent, and behavioural disorders, 30 percent, were most common, Simonoff et al, 2008.

ADHD

  • Njardvik et al, 2025

    • Oppositional defiant disorder, 34.7 percent

    • Behavioural disorders, 30.7 percent

    • Anxiety disorders, 18.4 percent

    • Specific phobias, 11.0 percent

    • Enuresis, 10.8 percent

    • Conduct disorder, 10.7 percent

  • Larson et al, 2011, 33 to 52 percent have one co occurring condition, 16 to 26 percent have two or more.

  • For adoptive children especially, there is an easy alternative, false, account of attachment or trauma instead of extra, comprehensive assessment.

Neurodivergence assessment and adoption

  • Recent conversation with a clinician about an adopted child

  • I did ADOS and ADI, and it was not autism but more of an attachment issue.

  • What was the evidence for attachment pathology

  • Well, it was not autism, that is, no evidence of attachment problem.

  • If not clearly autism, then if adversity present, trauma or attachment

  • Is it hard to diagnose autism in maltreated children

  • It can be, mainly because of the lack of early developmental history, but in over 20 years never because of a confound with attachment problems or trauma.

  • If you know about autism, ADHD, and attachment or trauma, and the evidence base, then it can be straightforward.

  • Like following a recipe, but you do need to know the ingredients.

Complexities in adoption and foster care

  • Both autism and ADHD are highly heritable, so birth parents may share some of the phenotype, the condition and its broader symptoms.

    • Autism heritability, 64 to 91 percent.

    • ADHD heritability, 22 to 80 percent.

  • The condition may be only partially expressed in a birth parent and not diagnosed, or fully expressed and services have not diagnosed them due to systemic biases, but still a heritable risk.

  • Many individuals with neurodevelopmental conditions make excellent parents.

    • But there are higher rates of parental mental health problems, substance misuse, domestic violence, in utero toxin exposure, and challenges engaging with services.

    • This is probably also related to shared genetic vulnerabilities with parental mental health difficulties, substance misuse, and trauma exposure, not just experience.

Complex bidirectional relationships between genes and experiences

  • Individuals with autism and ADHD are more likely to experience traumatic events compared to their neurotypical peers, due to social vulnerabilities and impulsivity.

  • After exposure to trauma, children with autism and ADHD are more likely to develop PTSD than their neurotypical peers, Haruvi Lamdan et al, 2018.

    • Children who have been abused and neglected are more likely to have symptoms of heritable neurodevelopmental conditions due to shared genetic factors, rather than the abuse or neglect causing the neurodevelopmental conditions, Minnis, 2024.

    • Children who are abused or neglected and have neurodevelopmental conditions are twice as likely to develop serious mental illness in adolescence.

    • There is some evidence from prospective studies of structural and functional brain changes following trauma exposure, Scheeringa, 2024.

    • There is more evidence of underlying brain differences in those who do or do not experience trauma and later develop PTSD.

  • Missed diagnoses, including comorbidities, co occurring issues, are a huge problem for these children.

Trauma, adversity, and misdiagnosis

Trauma versus neurodevelopmental conditions

  • Trauma does not change the core presentation of autism. If it looks like autism, it probably still is autism.

  • Overlap in soft signs can cause confusion, but these are often non specific and not diagnostic.

  • Several attractive graphics show overlap between ADHD and trauma, or autism and attachment, that have no basis in science or evidence.

  • The picture above does not pit core symptoms against each other but rather non specific soft signs which are not used to make the diagnoses. This is therefore meaningless, see also the Coventry Grid.

  • If a clinician chooses to use over inclusive and invalid definitions of problems, then they have chosen to increase the chances of overlap and confusion.

  • If a clinician is clear what each disorder is, how they differ, and how they overlap if at all, then diagnosis is much easier and more reliable, diagnostician versus tester.

Romanian adoption studies

  • https colon slash slash www dot kcl dot ac dot uk slash research slash the english and romanian adoptee era project

  • Profound deprivation led to some cases of quasi autism with atypical patterns, more social approach, symptom improvement over time, equal gender ratio.

  • There were also issues with inattention and overactivity, and some specific attachment issues, we will do another webinar to think about these issues more broadly.

  • The range of issues was combined into the concept of Deprivation Specific Psychological patterns, DSP, meaning broad developmental impacts from extreme neglect.

Most adopted children, even from severe deprivation, did not develop autism and most, but not all, showed remarkable recovery.

Diversity is the norm after early adversity

  • Even with very similar early experiences, the orphans outcomes did not converge onto the same issues but were wide ranging and non specific, that is, not one or two things like attachment or trauma.

    • “It has come to be generally accepted that the psychopathological effects of psychosocial stress and adversity are diagnostically nonspecific.” Kumsta et al, 2010.

  • “The presence of multiple neurodevelopmental and mental health problems, with characteristic developmental trajectories, creates a distinctive, complex, and heterogeneous clinical picture. Any two affected children rarely presented with the same clinical profile over time.” p1545.

  • Most adopted children, even from severe deprivation, did not develop autism and most, but not all, showed remarkable recovery.

Challenges experienced by adopted and fostered children with neurodevelopmental conditions

  • Elevated risk of traumatic events

  • More likely to develop PTSD following traumatic exposure

  • Challenges around transition and change in routine

  • Sleep difficulties are a risk factor for anxiety and depression, PTSD

  • Bullying and social exclusion

  • Stigma and social identity issues, camouflaging

  • Delayed diagnosis

  • Sensory challenges

  • Change in caregivers, harder to develop relationships, need caregivers with understanding of the individual profile

Support and adaptation strategies

Autism

  • “If you have met one autistic person, you have met one autistic person”, a person cannot know that type.

  • Individualised assessment to identify drivers of distress, for example anxiety and sensory needs.

    • A child will have a pattern of strengths and needs to build on.

    • Autistic siblings may have very different needs, which is especially challenging.

  • Environmental adaptation, for example reducing sensory overload and providing structure.

  • Skills development consistent with personal goals.

  • Avoid therapies that make unrealistic social or emotional demands, some of which are especially popular as off the shelf adoption therapies, and which do not adequately take into account social communication challenges.

ADHD

  • First line, environmental adaptations at home and school, whether or not medicines are also used.

  • Keep instructions short, give frequent and specific praise, use novelty, support gradual executive skill development.

  • Medicines can be very helpful for moderate to severe ADHD symptoms, but require careful titration and monitoring, as well as consideration of effects on comorbidities.

Pathological demand avoidance, PDA

  • Describes extreme avoidance of everyday demands, potentially due to anxiety, cognitive rigidity, or poor environmental adaptation.

    • “The term demand signifies a pressure or expectation from the child’s environment, either personal or physical, or it can refer to the child’s perception of external expectations pressuring them to do something different from what they were thinking or doing. The term avoidance signifies a behavioural response to this demand.” Newsom et al, 2003.

  • Not recognised as a distinct diagnostic category. Behaviours likely arise from multiple pathways.

    • For some clinicians and families, the pathological demand avoidance concept is helpful for making sense of complex developmental presentations. But there is not yet good evidence that this is a distinct group, no discriminant or predictive validity.

    • Pathological demand avoidance, symptoms but not a syndrome, Green et al, 2018. This means it is an important and meaningful part of the formulation, but not necessarily helpful to consider as a thing in itself.

    • Associated with different processes

      • Anxiety

      • Cognitive rigidity, and related intolerance of uncertainty

      • Limited prosocial emotions

      • Differences in theory of mind

      • Lack of effective environmental adaptations

      • Oppositional defiant disorder, plus irritability

  • There are risks of harm if this is framed as a deficit solely within the child.

Key takeaways

  • Neurodevelopmental conditions in adopted and fostered children are often underdiagnosed or misattributed to trauma or attachment difficulties.

  • Autism and ADHD are highly heritable, and adversity interacts with, but does not cause, these conditions.

    • Therefore birth parent mental health issues are very relevant. It is not all experience.

  • Accurate, multi informant assessment is critical for appropriate support.

  • Neuroaffirmative approaches focus on adaptation and inclusion, not fixing differences.

  • Co occurring conditions are common and should be actively assessed and managed.

What Next?

Thank you for joining our webinar and for all of your thoughtful questions and contributions to the discussion.

We hope you found the session useful and that it has given you new insights into understanding and supporting adopted and fostered children with neurodevelopmental conditions.

If you would like to find out more about our services or book an appointment, please follow the links below.

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