I'm going to answer that
with a VISUAL aid.
The Big Bang Theory Season 4, Episode 7
by measuring their response
to VISUAL stimuli.
The Big Bang Theory Season 7, Episode 5
In all fairness,
Pictionary has verbal skills, VISUAL skills.
The Big Bang Theory Season 6, Episode 4
-Here Condor 1. Visual of the targets.
-"I request the green light."
Money Heist Season 1, Episode 4
You employ a VISUAL display...
The Big Bang Theory Season 2, Episode 8