Connectivity analysis using functional brain networks to evaluate cognitive activity during 3D modelling

Muhammad Zeeshan Baig*, Manolya Kavakli

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)
19 Downloads (Pure)


Modelling 3D objects in CAD software requires special skills which require a novice user to undergo a series of training exercises to obtain. To minimize the training time for a novice user, the user-dependent factors must be studied. we have presented a comparative analysis of novice/expert information flow patterns. We have used Normalized Transfer Entropy (NTE) and Electroencephalogram (EEG) to investigate the differences. The experiment was divided into three cognitive states i.e., rest, drawing, and manipulation. We applied classification algorithms on NTE matrices and graph theory measures to see the effectiveness of NTE. The results revealed that the experts show approximately the same cognitive activation in drawing and manipulation states, whereas for novices the brain activation is more in manipulation state than drawing state. The hemisphere- and lobe-wise analysis showed that expert users have developed an ability to control the information flow in various brain regions. On the other hand, novice users have shown a continuous increase in information flow activity in almost all regions when doing drawing and manipulation tasks. A classification accuracy of more than 90% was achieved with a simple K-nearest neighbors (k-NN) to classify novice and expert users. The results showed that the proposed technique can be used to develop adaptive 3D modelling systems.

Original languageEnglish
Article number24
Pages (from-to)1-20
Number of pages20
JournalBrain Sciences
Issue number2
Publication statusPublished - 24 Jan 2019

Bibliographical note

Copyright the Author(s) 2019. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.


  • 3d modelling
  • Expert
  • Functional brain network
  • Information flow pattern
  • Novice
  • Transfer entropy


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