PROFESSOR STUART JOHNSTONE
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Neurocognitive Assessment Tool (NCAT)

NCAT Collect

Purpose: NCAT Collect was designed to measure a range of factors that contribute to or influence children’s processing of information. It measures brain activity, executive functions, sleep patterns, behaviour, and other factors.

​Programming Language: Unity
EEG input: Neurosky Mindwave II
Designer: Stuart Johnstone
Developer: Philip Roxas

NCAT Report

Purpose: NCAT Report was designed to quantify measures from NCAT Collect, and to allow comparisons to the database, and generate comparative reports. The Single Channel Processing Tool allows EEG analysis for input into NCAT Report.

​Programming Language: Unity
Designer: Stuart Johnstone
Developer: Philip Roxas

Peer-reviewed published research related to NCAT

  • Johnstone, S. J., Jiang, H., Zhang, D., O’Toole, C., Li, S.  (in press). Multi-domain assessment of childhood attention-deficit/hyperactivity disorder of the combined presentation. Research in Developmental Disabilities, accepted 21 July 2026.​
  • Zhang, D., Amran, A. S., Qin, Y., Jiang, H., Sun, L., Bellgrove, M., Johnstone, S. J. (2025).  Cross-cultural variations in executive function deficits among children with ADHD. JCCP Advances. https://doi.org/10.1002/jcv2.70032
  • McCabe, L.E., Johnstone, S. J., Jiang, H., Sun, L., Zhang, D. (2023).  Links between excessive daytime sleepiness and electroencephalogram power and activation in two subtypes of Attention Deficit Hyperactivity Disorder. Biological Psychology, 177, 108504. https://doi.org/10.1016/j.biopsycho.2023.108504
  • Jiang, H., Johnstone, S. J., Lu, J. (2022). Comparing the efficacy of two school-based approaches of neurocognitive training for enhancing executive functions. Children, 9(10), 1501. https://doi.org/10.3390/children910150
  • Johnstone, S. J., Parrish, L., Jiang, H., Zhang, D., Williams, V., Li, S. (2021).  Aiding diagnosis of childhood attention-deficit/hyperactivity disorder of the inattentive presentation: Discriminant function analysis of multi-domain measures including EEG. Biological Psychology, 161, p ?. https://doi.org/10.1016/j.biopsycho.2021.108080 
  • Johnstone, S. J., Jiang, H., Sun, L., Rogers, J. M., Valderrama, J., Zhang, D. (2020). Development of frontal EEG differences between eyes-closed and eyes-open resting conditions in children: data from a single-channel dry-sensor portable device.  Clinical EEG and Neuroscience, 52, 235-245. https://doi.org/10.1177/1550059420946648
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