3V0493.01 Fragmentary sound knowledge contrast to prosodics (5/30/79)

Diaper = /dai/ — Peggy needed changing this morning — so I believed —
and Gretchen upstairs agreed to do it. Peggy was complaining loudly,
toddling around and smacking her plastic pants. To make certain, I
asked, “What do you want, Peggy?” She replied [die] (/dai/) and
toddled over to the stairs eagerly.

When we got upstairs, Gretchen was folding laundry. I asked her not to
use any of her normal phrases. She asked something like “What shall
we do, Peggy?” Peggy, grabbing her plastic pants and smiling, said /gi/
and ran (at a fast toddle) into her bedroom.

Importance — It is very difficult to capture the sense of an infant’s
knowledge of names in speech production. These two incidents focus
on a situation where Peggy’s meanings were clear to me from the
pragmatics. In her attempts to respond to questions, we see her
produce parts of sound patterns we associated with the name ‘diaper’
and the action ‘change’. This very fragmentary speech knowledge
contrasts amazingly with the performances which witness Peggy’s rich
prosodic knowledge described in the later notes under the heading
TIRADEs.