T-Glottalization Index
Replacing /t/ with a glottal stop [ʔ] is a massive social marker in UK dialects. Count your occurrences in a 100-word reading passage containing intervocalic and pre-consonantal /t/s.
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Clinical Notes
Relying on auditory feedback alone for this metric is proven to be ineffective in adult language learners. Biometric feedback is required to remap established motor patterns.