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Reverse Causation: Deciding Which Way the Arrow Points

The second alternative explanation, and the one students most often skip. The paper reports pitch variability correlating with verbal fluency (r = 0.17), with the g factor (r = 0.14) and with openness (r = 0.13). A lively voice could follow from fluent speech as easily as fluent speech could follow from a lively voice, and a cross-sectional measurement cannot order them.

Questions this Concept answers

Why can a study that measures two traits at a single point in time not settle which one is causing the other?

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Correlation vs Causation: Minimizing Bias and Confounding in Epidemiology

Epidemiology studies disease distribution and determinants across populations, and a central challenge is distinguishing causal exposure-outcome relationships from mere correlation, since observation…