Pair Implicit With Explicit
Reaction-time methods tell you the gut response; surveys tell you the reasoning. Each has a blind spot the other covers. The strongest designs use them together.Combine implicit and explicit measures. The reaction-time signal gives you the instinct; the stated answer gives you the rationale. Read them together, not in isolation.
Each method has a blind spot
An implicit, reaction-time measure is excellent at telling you what people respond to and how strongly, but it does not hand you the reason in their words.¹ An explicit survey gives you the articulated reason and the demographics, but it is vulnerable to the say/do gap. Used alone, each leaves you guessing about the half it cannot see.
Together they triangulate
Run together, they check each other. When the instinctive signal and the stated reason point the same way, you can act with confidence. When they pull apart, you have not got a problem — you have got a finding: a place where what people feel and what they will admit to feeling have come unstuck, which is often exactly where the opportunity is.
A rule for combining them
Lead with the behavioural measure for the decision itself, and use the survey to explain and segment around it. Let the reaction-time data carry the verdict; let the explicit answers tell you who, and why, and what to do next.