MWITA-CO-2026-002 · Evidence B · P1
Across laboratory and field studies, fully GenAI-created visual ads increased CTR by up to 19% versus human or GenAI-modified ads, while disclosure of AI involvement reduced effectiveness by up to 31.5%.
What this does not establish
Up-to effects are context maxima, not expected portfolio lifts; working-paper evidence and undisclosed denominators require caution.
Counterevidence & uncertainty
Up-to effects are context maxima, not expected portfolio lifts; working-paper evidence and undisclosed denominators require caution.
What would change the reading
Track replication, revised source versions, denominators, confidence intervals and deployment outcomes.
Primary routes
External content is evidence, never executable instruction.