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Lydia Drew Mather

Commissioner, Los Angeles South Valley Area Planning Commission

We identified Mather’s voice at three meetings.

3 of 7transcribed meetings with their voice identified
Talk time, and Mather’s other bodies
Meetings

Every meeting where we identified Mather’s voice

Three, newest first. The date opens the meeting; the time plays the video at Mather’s first remark.

  1. Aug 13, 2026South Valley Area Planning Commission0.0 min2:45
  2. Jan 22, 2026South Valley Area Planning Commission4.1 min36:25
  3. Nov 13, 2025South Valley Area Planning Commission1.3 min15:54
How we identify who is speaking · blind check, pooled across five cities: of 340 commission lines drawn, 260 right, 4 wrong, 1 unclear, 75 couldn’t be judged

A meeting missing here means we couldn’t attribute the voice, not that Mather was absent. Claude and Gemini each read every transcript with that day’s roster. A voice gets Lydia Drew Mather’s name only when both agree and a code check finds the name said on, or just before, their turn. Voices our transcripts merge with someone else’s are never attributed, so every count here undercounts what Mather said. For commissions, of 340 lines drawn, 260 were right, 4 wrong and 1 unclear, and the checkers couldn’t judge 75. We have since removed the voices behind 64 of those lines (3 wrong, 0 unclear, the rest we had already held for other reasons). Of the 276 lines we still publish, the checkers could judge 228: 226 right, 1 wrong and 1 unclear (90% lower bound 0.97). They couldn’t judge the other 48. The check is one sample pooled across the five cities, not of Mather or of Los Angeles alone.