Cluster-span threshold: an unbiased threshold for binarising weighted complete networks in functional connectivity analysis

Keith Smith, Hamed Azami, Mario A Parra, John M. Starr, Javier Escudero

Research output: Contribution to conferencePaper

9 Citations (Scopus)

Abstract

We propose a new unbiased threshold for network analysis named the Cluster-Span Threshold (CST). This is based on the clustering coefficient, C, following logic that a balance of ‘clustering’ to ‘spanning’ triples results in a useful topology for network analysis and that the product of complementing properties has a unique value only when perfectly balanced. We threshold networks by fixing C at this balanced value, rather than fixing connection density at an arbitrary value, as has been the trend. We compare results from an electroencephalogram data set of volunteers performing visual short term memory tasks of the CST alongside other thresholds, including maximum spanning trees. We find that the CST holds as a sensitive threshold for distinguishing differences in the functional connectivity between tasks. This provides a sensitive and objective method for setting a threshold on weighted complete networks which may prove influential on the future of functional connectivity research.

Conference

Conference37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2015
CountryItaly
CityMilan
Period25/08/1529/08/15

Fingerprint

Cluster Analysis
Connectivity
Short-Term Memory
Electroencephalography
Volunteers
Network Analysis
Research
Clustering Coefficient
Memory Term
Spanning tree
Clustering
Logic
Topology
Arbitrary
Datasets

Keywords

  • connectivity measurements
  • nonlinear coupling of biomedical signals
  • network analysis
  • electroencephalogram data set

Cite this

Smith, K., Azami, H., Parra, M. A., Starr, J. M., & Escudero, J. (2015). Cluster-span threshold: an unbiased threshold for binarising weighted complete networks in functional connectivity analysis. 2840-2843. Paper presented at 37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2015, Milan, Italy. https://doi.org/10.1109/EMBC.2015.7318983
Smith, Keith ; Azami, Hamed ; Parra, Mario A ; Starr, John M. ; Escudero, Javier. / Cluster-span threshold : an unbiased threshold for binarising weighted complete networks in functional connectivity analysis. Paper presented at 37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2015, Milan, Italy.4 p.
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Smith, K, Azami, H, Parra, MA, Starr, JM & Escudero, J 2015, 'Cluster-span threshold: an unbiased threshold for binarising weighted complete networks in functional connectivity analysis' Paper presented at 37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2015, Milan, Italy, 25/08/15 - 29/08/15, pp. 2840-2843. https://doi.org/10.1109/EMBC.2015.7318983

Cluster-span threshold : an unbiased threshold for binarising weighted complete networks in functional connectivity analysis. / Smith, Keith; Azami, Hamed; Parra, Mario A; Starr, John M.; Escudero, Javier.

2015. 2840-2843 Paper presented at 37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2015, Milan, Italy.

Research output: Contribution to conferencePaper

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AU - Escudero, Javier

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Smith K, Azami H, Parra MA, Starr JM, Escudero J. Cluster-span threshold: an unbiased threshold for binarising weighted complete networks in functional connectivity analysis. 2015. Paper presented at 37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2015, Milan, Italy. https://doi.org/10.1109/EMBC.2015.7318983