Spot the Difference Quiz
Learn how sharp your eye is for small changes in just 10 minutes. Enjoy 16 quick text comparisons with instant results and no sign-up.


08:30
Scale Explorer
How the Scales are Structured
DATA-BASED USER COHORTS
Who Usually Takes This Test?
BASED ON AGGREGATED, ANONYMIZED DATA FROM TENS OF THOUSANDS OF FREUDLY USERS.
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See How You Compare
Once you complete the test, your results are compared with real-world data from people in your country.
Below is a preview of how scores are typically distributed across each scale.
Below is a preview of how scores are typically distributed across each scale.
Spot the Difference Knowledge (StDK)
Spot the Difference Knowledge (StDK)
Average
6.9
Normal range
4.9 — 8.9
min.
0
max.
16
This curve shows how scores are typically distributed.
Once you complete the test, your result will appear on the scale so you can see how you compare.
Once you complete the test, your result will appear on the scale so you can see how you compare.
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SAMPLE QUESTIONS
Example Questions From the Test
- The D changed from uppercase to lowercase.
- The first P changed from uppercase to lowercase.
- The L changed from uppercase to lowercase.
- The final 9 changed to a lowercase g.
- One I was removed from the ending.
- One P was removed from the double-P pair.
- The final I was changed to a Y.
- One S was removed from the first double-S pair.
- Birch and Maple exchanged positions.
- Maple was replaced by Oak.
- Cedar and Pine exchanged positions.
- The final label was removed.
WHAT THE TEST MEASURES
About This Assessment
Spot the Difference Quiz - Symptoms and Signs
How sharp is your eye for subtle changes? This free, no-sign-up Spot the Difference Quiz presents 16 text-based comparison challenges involving sentences, lists, codes, coordinates, schedules, punctuation, and quantities. Examine each reference and variant, then identify the one detail that changed. Your result summarizes your performance on this set of challenges; it is not a clinical assessment of attention or vision.
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