Comment on: Evaluating causal relations in neural systems: Granger causality, directed transfer function and statistical assessment of significance

TL;DR

This paper critically examines claims linking the directed transfer function (DTF) to Granger causality, demonstrating that the previously asserted relationship is incorrect and clarifying the distinction between these concepts.

Contribution

The authors refute the claimed equivalence between DTF and Granger causality, clarifying the conceptual differences and correcting misconceptions in the existing literature.

Findings

The claimed relationship between DTF and Granger causality is false.

The paper clarifies the conceptual differences between DTF and Granger causality.

It emphasizes the importance of correct statistical assessment in neural systems analysis.

Abstract

We comment on a paper by Kaminski et al. (2001) and show that their claim of a relationship between the directed transfer function (DTF) and the concept of Granger causality is false.