# Granger Causallity - [Autoregressive](Autoregressive.md) - If significant then electrode Granger-causes another - Theres some causality but not sure if physical or causal - ![](../images/Pasted%20image%2020220502162343.png) - Partial Directed Coherence - Directed [Transfer Function](Transfer%20Function.md) - ![](../images/Pasted%20image%2020220502162559.png) - Magnitude vs freq - Undirected - From O1 to PZ is different from PZ to O1 - How well can activity in one channel predict one in another