Case Study:Delivering Quality Human Transcriptions for Clinical Speech Research

Client Background & Objectives

A UK research laboratory evaluating commercial audio transcription tools needed gold standard human transcriptions to use as a benchmark against machine-generated transcripts. The recordings, which were controlled, single-speaker tasks in realistic clinical settings, required not just word accuracy, but precise capture of dysfluencies, hesitations, mispronunciations, and non-speech sounds, all of which can reveal cognitive and emotional health indicators.

Scope & Requirements

The lab supplied recordings of volunteers reading poems, describing line drawings, and repeating tasks in different acoustic environments. Vocabulary was limited and predictable, but the transcription brief was more detailed than industry norms:

• Full verbatim, including all speech irregularities and non-speech vocalisations

• Consistent notation for unclear utterances

• Timestamps for every utterance

• No AI involvement – 100% human transcription

Our Approach

1. Expert Transcribers Only – Senior team members with 10+ years’ experience in full-verbatim research transcription handled the work.
2. One Transcriber per Batch – 30 recordings per transcriber to ensure consistency and familiarity with each speaker’s style.
3. Enhanced Quality Control – Every file reviewed line-by-line against the audio, with bespoke templates and a project-specific guideline document.
4. Specialist Preparation – A custom training video explained the research context and technical transcription requirements.

• Contextual understanding, which can easily be missed by AI.

• Recognition of accents, speech irregularities, and non-verbal cues.

• Ability to adapt to a speaker over time and refine earlier transcripts.

Client Impact

The lab received meticulously timestamped transcripts meeting every specification. These now serve as benchmarks for:

• Comparing multiple AI transcription tools

• Testing performance in varied acoustic environments

• Analysing speech patterns for mental health research

Conclusion

The outcome reinforced the value of expert human transcription when precision, nuance, and context are essential. At McGowan Transcriptions, we’re proud to support ground-breaking research with transcription services that meet the highest standards of academic and clinical precision.