Table 3.

Sample layout of the word order video.

Video 1	Audio	Video 2
Pa Horse waves	Look, a horse! See, the horse!	Blank
P Blank	Look a bird! See, the bird!	Bird waves
P Horse waves	We see both!	Bird waves
P Horse waves	Look at the horse!	Bird waves
P Horse waves	Look at the bird!	Bird waves
1 Blank	Look, pushing! See, pushing!	Bird pushes horse
2 Horse pushes bird	Look, pushing! Wow, pushing!	Blank
3 Horse pushes bird	They are on both screens!	Bird pushes horse
4 Horse pushes bird	Look, the bird is pushing the horse! (Block repeats with tickle/pull/wash/ hug/ride)	Bird pushes horse

^aP indicates the pretest trials.