Table 2.

Discriminative Stimuli and target responses for human video modeling

Participant	Discriminative stimuli	VR	FE	BE
Isaac	“Who made the Thinker?”	Rodin	scrunches face	puts fist to chin (wrinkles nose, raises cheeks to eyes)
	“What were yew trees	bows	widens eyes	draws bow
				used for?”
	“King Solomon was …”	wise	smiles	points to temple
Mark	“Peek-a …”	boo	widens eyes	palms facing Clinician
	“What do you read?”	book	looks down	palms upward at chest level
	“Sugar pie honey …”	bunch	head back	fist to mouth
Anesha	“What is in the sky?”	sun	smiles	extends fingers
	“What does a frog do?”	ribbit	closes eyes	hands parallel and flat
	“Mary had a little …”	lamb	tilts head	folds hand and places on cheek
Maria	“Up and …”	down	looks down	points down
	“3-2-1”	blast off	looks up	extends fingers on both hands
Ray	“You drink …”	milk	pursed lips	makes drinking motion
	“See you …”	later	tilts head to side	waves
	“You sleep in a …”	bed	closes eyes	palms together
placed on cheek
Kadeem	“The weasel goes …”	pop	opens mouth	points forward
	“What’s new pussycat?”	wo	head back	fist to mouth
	“What does a hyena do?”	bites	bares teeth	makes claws
	“Do you like cabbage?”	no	scrunches face	pushes away
Leon	“A kitty goes …”	meow	closes eyes	motions whiskers on face
	“A siren goes …”	woooo	widens eyes	points up
	“A cow goes …”	moo	face down	fists to head like horns
Gavin	“What do we smell with?”	nose	tilts head back	points to nose
	“What do we wear on our feet?”	shoes	tilts head down	points down
	“What does a duck do?”	quack	puckers lips	flaps arms