touch perception

NOUN
16 LETTERS · STARTS WITH T

touch perception is a valid 16-letter word worth 26 points in Scrabble and 31 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
T1O1U1C3H4P3E1R1C3E1P3T1I1O1N1
1 + 1 + 1 + 3 + 4 + 0 + 3 + 1 + 1 + 3 + 1 + 3 + 1 + 1 + 1 + 1 =26 PTS
DOUBLE WORD → 52TRIPLE WORD → 78
MEANING

What does touch perception mean?