# Inspection Time
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# What does it measure?
The Inspection Time test measures a patient's visual processing speed - a foundational component of cognition.
# Test Administration
The Inspection Time test takes approximately 1-2 minutes to complete.
Before you begin your test, ensure your device is at maximum brightness and hold the device in landscape with both hands.
# Step 1
When you begin your test, your screen will appear white with two T-shaped lines, one twice as long as the other.
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# Step 2
After a short period of time, the T-shaped lines will be masked. Touch the side of the screen with the longer T-shape.
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# Repeats Steps 1 & 2
The duration of time before the lines are masked is reduced as you correctly identify which line is longer. Repeat steps 1 and 2 until the end of the test.
# Results Interpretation
Test scores are in intervals of 17ms in order to be synchronized to the screen refresh rate of 60 hertz. Mean adult inspection time is 51 - 68 ms, and the typical range is 34ms - 102 ms.
You can find more information on Inspection Time normative data here