The Tracker Time Bomb: What Happens When You Don’t Strategically Blend Sample
October 7, 2025
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October 7, 2025Trackers rely on consistency. But what happens when a once-reliable panel partner starts to underperform, skews incidence, shows ongoing quality issues, or raises concerns?
It’s more common than you think.
The Reality: No Panel Stays Perfect Forever
Panel dynamics change constantly. Recruitment methods shift. Incentive structures evolve. Invite process change. Respondents churn. And sometimes, a partner simply drops the ball.
For ad hoc studies, that’s annoying.
For a tracker? It’s a landmine.
Warning Signs of a Panel Has Gone Bad
- Falling incidence rates wave-to-wave without a clear reason
- Increased dropouts, straight-liners, or fraud flags
- New demographic skews wave-to-wave
- Consistent top-up needs due to under-delivery
- Internal stakeholders questioning the data’s reliability
The Wrong Reaction: Do Nothing
Too often, researchers feel stuck. They worry that replacing a panel will break the trend line, so they continue fielding with a panel that’s clearly isn’t working anymore.
But here’s the truth: switching panels is not only possible, it’s necessary. You just have to do it strategically.
What to Do Instead: Strategically Blend Your Way to a Better Baseline
Using EMI’s IntelliBlend® framework, we:
- Identify “like” panels based on attitudinal and behavioral data
- Create a transitional blend to replace the underperformer
- Maintain fielding cadence and quotas to preserve trend continuity
- Monitor wave-to-wave consistency using diagnostic tools
Replacing a panel doesn’t have to mean starting over. With the right blending plan, it’s a smart mid-course correction – not a reset button.
Download our eBook to learn how to best transition a tracker.



