Author

Mark H. Johnson

3 papers indexed here

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Open access Oct 2026

Infant Attention to Eyes Versus Mouth Varies With Mouth Movement Speed, Family History of Autism and Language Development.

PURPOSE Patterns of visual attention to faces are mixed in infants with a family history of autism relative to controls. Attention deficit hyperactivity disorder (ADHD) often co-occurs with autism and could represent one source of variance in findings. Heterogeneity in language skills may represent another source of va...

Mary Agyapong, Luke Mason, J. Begum-Ali et al. · Journal of Autism and Develo... · 0 citations

Open access Aug 2026

Early motor development in ADHD: monogenic and polygenic trajectories using NF1 as a model

It is shown that motor difficulties emerge early in infants with NF1, whereas such difficulties are not evident in those at elevated likelihood of ADHD in the general population, and early motor behaviour predicts later ADHD traits in ways that are specific to both developmental context and population.

Sadali Wanniarachchi, Jannath Begum Ali, Paola Piza Martinez et al. · Journal of Neurodevelopmenta... · 0 citations

Open access Aug 2026

Developmental Trajectories of Autistic Traits in Infants With Autism and/or ADHD Family History: Predictors and Mid-Childhood Outcomes.

The timing and developmental course of autistic traits-independent of trait level-relate meaningfully to infant and family characteristics, diagnostic timing, and mid-childhood outcomes, which support chronogeneity as a valuable framework for understanding autism heterogeneity in family history studies.

T. Charman, Tessel Bazelmans, G. Pasco et al. · Journal of Autism and Develo... · 0 citations