Conceptual
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Reducing an F0 Track to Summary Measures

A pitch track is thousands of frames; a study needs one number per person per measure. Median pitch and pitch variability are two different reductions of the same track, and the seed paper treats them as separate phenotypes with different heritabilities — 17% for pitch and 13% for pitch variability. Students must see that the choice of summary creates the trait.

Questions this Concept answers

  • Why do a speaker's typical pitch and their pitch variability count as two different traits rather than one?