Team · Lead, Adherence Panel (CCS-ADH)
Dr. Liu Wei
HCI Researcher & Adherence Lead
“Accuracy without adherence is a lab metric. Adherence without accuracy is a habit attached to bad data. We measure both.”
Who is Dr. Liu Wei?
Liu Wei runs the part of the benchmark that doesn't fit in a unit test: whether a real person is still logging on day 84. They lead the CCS-ADH adherence panel — 487 participants across 21 countries, recruited per a documented sampling frame, each randomly assigned to a tracker for the full 12-week window. Liu's PhD work at NTU was on long-tail engagement in habit-forming apps, and the friction-point taxonomy they developed there is what TCCS uses to code qualitative interview transcripts. They are the strongest internal voice for not over-weighting raw accuracy: if an app is more accurate but no one is still using it in week 12, the benchmark needs to reflect that.
What does Wei specialise in?
- Longitudinal panel design
- Attrition-curve analysis
- Qualitative coding
- Friction-point taxonomies
Where did Wei study?
- PhD, Human-Computer Interaction — National Taiwan University (2013)
- MSc, Information Science — National Chengchi University (2010)
What did Wei do before The Calorie Counter Standard?
- Associate Researcher, public-health behaviour-change lab (2015–2023)
- UX Research Lead, regional health-tech company (2013–2015)
What has Wei published?
- Liu W., Hsieh T. "Twelve-week attrition signatures in food-tracking apps: a cohort study." Conference paper, 2022.
Which CCS calorie counter protocols does Wei own?
Dr. owns the following CCS scoring protocols. See the methodology page for what each measures.
CCS-ADH
Reviews by Dr.
- Noom Review — 59.1/100
How do you contact Wei?
For panel methodology questions, email research@calorie-counters.com.