Brand Lift Survey After DOOH Campaign: Setup, Tools, Validity

TL;DR

A brand lift survey measures whether your DOOH campaign actually moved awareness, consideration, or purchase intent — by comparing an exposed group against a control group. Setup from €800 (Pollfish/Cint), minimum 400 per group for significance. Realistic awareness lift: 5–18 percentage points.

What a brand lift survey really measures

One question: ‘‘Did the campaign create more impact than if we had NOT run it?’’

If you run DOOH in May and brand recall is up 12% in June, that could be seasonality, other channels, or luck. A controlled survey isolates the DOOH effect.

Four core metrics:

1. Aided Awareness — ‘‘Which of these brands do you know?’’
2. Unaided Awareness — ‘‘Which brands in category X come to mind?’’
3. Consideration — ‘‘Which would you consider for next purchase?’’
4. Purchase Intent — ‘‘How likely to buy in next 30 days?’’ (1–10)

The clean setup (4 steps)

Step 1: Geo-target the survey

Respondents must come from the same region as the DOOH inventory. Vienna campaign tested with Linz residents = worthless. Pollfish and Cint support postal code targeting natively.

Step 2: Exposed vs control identification

Method A — Self-report (cheap, biased): Ask ‘‘Do you remember seeing ads for [brand]?’’ Recall bias inflates lift.

Method B — Mobile ID match (clean, expensive): DOOH inventory delivers anonymized mobile IDs of devices that passed screens. Survey tool matches against panel database. From €5,000.

Method C — Pseudo-control (SMB workaround): Geo comparison — Vienna (active) vs Linz (inactive) with matched demographics. Affordable at €800–2,000.

Step 3: Sample size

For 95% confidence at 5pp minimum detectable difference:

Min sample per group = ((1.96)² × p × (1-p)) / d²

With p=0.3, d=0.05 → n = 323 per group. Use 400+400 in practice.

Step 4: Timing

• Pre-wave: 1 week before campaign (baseline)
• Post-wave: Within 7 days after campaign (recall drops fast)

Skipping pre-wave is the #1 methodological error.

Tools for SMB

Under €5,000 media spend? Skip the survey — costs would eat 20%+. Use pseudo-control + brand-search lift instead.

Rough orientation for lift values (not our own study)

• Aided Awareness: +3–8pp small, +8–18pp larger campaigns
• Unaided Awareness: +1–4pp
• Consideration: +2–6pp
• Purchase Intent: +1–4pp

Red flag: anyone reporting +25pp aided awareness from a €3,000 campaign broke methodology somewhere.

What surveys CANNOT tell you

• ROI — needs conversion + attribution
• Long-term brand equity — 7-day survey only measures recall
• Creative A vs B — needs split inventory test

See also: DOOH cost overview and Share of Voice explained.

Calculate now

Plan campaign with brand-lift budget reserve: DOOH calculator.