What is change blindness?

Failing to notice a change in a scene

In the famous door study, what changed?

The person asking for directions

What does the flicker method show?

Two slightly different images with a blank between

What helps people notice a change?

Paying attention to the changing part

What is inattentional blindness?

Missing an unexpected object while focused on a task

Seeing things that are not there

Why does change blindness matter for eyewitnesses?

People can miss or misremember details

Witnesses always remember perfectly

Change Blindness Quiz: Why We Miss Big Visual Changes

This change blindness quiz explains why the brain can overlook surprising changes in what we see. Play an interactive set of 10 questions on the door study, the flicker method, blinks and eye movements, attention, inattentional blindness, the invisible gorilla, film continuity errors and what this means for witnesses.

Start Change Blindness Quiz

🎯 Daily Trivia Challenge • 🧠 10 Questions • ⏱️ 150 Seconds

Question 1 / 10 Time: 150s

Define
What is change blindness?
Door
In the famous door study, what changed?
Share
Roughly how many people missed the swap in that study?
Flicker
What does the flicker method show?
Blink
Why can changes during blinks go unnoticed?
Attention
What helps people notice a change?
Related
What is inattentional blindness?
Gorilla
What did people often miss in the invisible gorilla study?
Film
Which kind of mistake in movies relates to change blindness?
Courts
Why does change blindness matter for eyewitnesses?

Explanations: answer key for all 10 questions

Q1: What is change blindness?
Answer: Failing to notice a change in a scene
The change can be large.
Q2: In the famous door study, what changed?
Answer: The person asking for directions
Many people did not notice.
Q3: Roughly how many people missed the swap in that study?
Answer: About half
They kept giving directions.
Q4: What does the flicker method show?
Answer: Two slightly different images with a blank between
The blank hides the change.
Q5: Why can changes during blinks go unnoticed?
Answer: The brief gap masks the change
Eye movements do the same.
Q6: What helps people notice a change?
Answer: Paying attention to the changing part
Attention is limited.
Q7: What is inattentional blindness?
Answer: Missing an unexpected object while focused on a task
It is closely related.
Q8: What did people often miss in the invisible gorilla study?
Answer: A person in a gorilla suit
They were counting passes.
Q9: Which kind of mistake in movies relates to change blindness?
Answer: Continuity errors
Props change between shots.
Q10: Why does change blindness matter for eyewitnesses?
Answer: People can miss or misremember details
Memory is less reliable than it feels.

Change Blindness Quiz – Why We Miss Big Visual Changes

Change blindness is the failure to notice a change in a scene, even a large one. It shows that we do not store a full picture of the world, but rely on attention to pick out details.

In a famous study, a person asking for directions was swapped with someone else while a door was carried between them, and about half of people did not notice. In flicker tests, a brief blank between two images hides the difference.

A related effect, inattentional blindness, explains why many people miss a gorilla while counting basketball passes. These effects help explain film continuity errors and why eyewitness memory can be unreliable.

What This Quiz Teaches

Psychology fans will enjoy these questions.

What change blindness is
Which studies showed it
Why blinks hide changes
How attention matters
Why it matters in real life

Did You Know?

Daniel Simons led several famous studies on this.
Magicians use attention tricks on audiences.
Drivers can miss hazards while distracted.
Spot-the-difference puzzles test the same skill.
Experts notice changes in familiar scenes more easily.