Science of Justice

7 Fatal Focus Group Analysis Mistakes


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Ever walked out of a focus group riding high, only to realize later you were chasing a mirage? We dig into the seven hidden mistakes that quietly sabotage plaintiff focus groups and show how to replace seductive but shaky feedback with data you can actually use at trial.

We start where most strategies fail: recruitment. Convenience samples from Craigslist and generic online panels don’t mirror your jury pool and are now riddled with bots, farms, and professional survey takers. We break down purposive sampling, county-level quotas, and oversampling so your room reflects real demographics and decision styles. From there, we go inside the session to expose how groupthink, bandwagon effects, and courtesy bias manufacture artificial consensus, and why attorneys should never moderate their own groups. Neutral facilitators trained in psychology keep the conversation honest, probe dissent, and prevent subtle cues from steering the room.

Then we reframe the goal: focus groups diagnose; they don’t predict verdicts or damages. You’ll learn how to separate signal from noise, why three well-run groups capture most of the meaningful insight, and how to avoid overfitting to vivid anecdotes. We get practical with behavioral tools—facial coding that flags microexpressions at key moments and linguistic analysis that reveals who assigns agency, who leads with emotion, and which words backfire. Combined, these methods produce juror profiles that sharpen voir dire, refine openings and closings, and target discovery to pressure-test defense witnesses and language that alienates jurors.

If you’re ready to stop preparing for a phantom jury and start shaping strategy around how your venue truly thinks, this conversation is your blueprint. Subscribe, share with a colleague who runs focus groups, and leave a review telling us the one change you’ll make to your next mock—what will you fix first?

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Science of JusticeBy Jury Analyst

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