Unified Granger causality analysis (uGCA) alters conventional two-stage Granger causality analysis into a unified code-length guided framework. We have presented several forms of uGCA methods to investigate causal connectivities, and different forms of uGCA have their own characteristics, which capable of approaching the ground truth networks well in their suitable contexts. In this paper, we considered comparing these several forms of uGCA in detail, then recommend a relatively more robust uGCA method among them, uGCA-NML, to reply to more general scenarios. Then, we clarified the distinguished advantages of uGCA-NML in a synthetic 6-node network. Moreover, uGCA-NML presented its good robustness in mental arithmetic experiments, which identified a stable similarity among causal networks under visual/auditory stimulus. Whereas, due to its commendable stability and accuracy, uGCA-NML will be a prior choice in this unified causal investigation paradigm.

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Posted 17 May, 2021
Received 17 Jun, 2021
On 17 Jun, 2021
Received 24 May, 2021
Received 12 May, 2021
Invitations sent on 12 May, 2021
On 12 May, 2021
On 11 May, 2021
On 11 May, 2021
On 11 May, 2021
On 11 May, 2021
On 10 May, 2021
Posted 17 May, 2021
Received 17 Jun, 2021
On 17 Jun, 2021
Received 24 May, 2021
Received 12 May, 2021
Invitations sent on 12 May, 2021
On 12 May, 2021
On 11 May, 2021
On 11 May, 2021
On 11 May, 2021
On 11 May, 2021
On 10 May, 2021
Unified Granger causality analysis (uGCA) alters conventional two-stage Granger causality analysis into a unified code-length guided framework. We have presented several forms of uGCA methods to investigate causal connectivities, and different forms of uGCA have their own characteristics, which capable of approaching the ground truth networks well in their suitable contexts. In this paper, we considered comparing these several forms of uGCA in detail, then recommend a relatively more robust uGCA method among them, uGCA-NML, to reply to more general scenarios. Then, we clarified the distinguished advantages of uGCA-NML in a synthetic 6-node network. Moreover, uGCA-NML presented its good robustness in mental arithmetic experiments, which identified a stable similarity among causal networks under visual/auditory stimulus. Whereas, due to its commendable stability and accuracy, uGCA-NML will be a prior choice in this unified causal investigation paradigm.

Figure 1

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Figure 5

Figure 6
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