positive reinforcer

NOUN
19 LETTERS · STARTS WITH P

positive reinforcer is a valid 19-letter word worth 28 points in Scrabble and 32 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
P3O1S1I1T1I1V4E1R1E1I1N1F4O1R1C3E1R1
3 + 1 + 1 + 1 + 1 + 1 + 4 + 1 + 0 + 1 + 1 + 1 + 1 + 4 + 1 + 1 + 3 + 1 + 1 =28 PTS
DOUBLE WORD → 56TRIPLE WORD → 84
MEANING

What does positive reinforcer mean?

NOUN · 1 SENSE
1

A reinforcing stimulus that serves to increase the likelihood of the response that produces it.