Extending Transfer Entropy Improves Identification of Effective Connectivity in a Spiking Cortical Network Model
Figure 2
Comparison of effective connectivity measures.
A: (left panel) peak values for all measures compared. B: (right panel) coincidence index values of all measures compared. The true positive rate (TPR) of detection is plotted against the false positive rate (FPR). These Receiver Operating Characteristic (ROC) curves were drawn by applying each measure to 30 minutes of data. Error bars were calculated at several positions based on 8 repetitions of the simulation. Vertical errors show standard deviation of TPR with fixed FPR; horizontal errors are that of FPR with fixed TPR. Inset shows purity plotted against TPR. In panel A, note that transfer entropy at delay of one time bin (D1TE) is clearly inferior to higher order transfer entropy peak (HOTEPk) and transfer entropy peak (TEPk).