Flanker Effect, explained.
The flanker effect concerns how task-irrelevant neighbouring stimuli can interfere with selecting a target response.
Why it happens
Ten arrow trials alternate matching and conflicting flankers. Only the centre arrow determines correctness. Accuracy is counted separately; no response-time effect is fabricated.
The flanker effect concerns how task-irrelevant neighbouring stimuli can interfere with selecting a target response.
Read the result
Read matching and conflicting accuracy separately. A wrong key is an observed response, not a simulated slowing effect.
A worked example
One centre arrow among distractors
Inspect the central arrow before choosing left or right on the first trial.
Continue through all ten trials, including the five with conflicting neighbours.
Compare actual correct counts across conditions without interpreting this tiny untimed result as a reaction-time study.
OPTIONAL DEEPER DETAILGo deeper: inside the model
Inside this model
Ten arrow trials alternate matching and conflicting flankers. Only the centre arrow determines correctness. Accuracy is counted separately; no response-time effect is fabricated.
Where this idea is useful
A practical use
Use the task to ask whether surrounding icons compete with the action a reader actually needs to select.
A common misconception
“Everyone must perform worse on the conflicting cards.”
A participant can answer every card correctly. The interface records that result instead of manufacturing a difference.
What this explanation leaves out
- Untimed, unblinded and limited to ten trials; no reaction-time claim, diagnosis or laboratory replication is made.
Why is there no speed score?
Manual browser timing and ten unblinded trials do not reproduce a controlled reaction-time experiment; accuracy is the transparent outcome here.
Which nearby cue competes with the action your user actually needs?
Associated thinkers
Associations marked provisional are awaiting source review.
Further reading
Explore the original research or the teaching reference behind this experiment.