  To acquire language, children need rich language input. However, many parents
find it difficult to provide children with sufficient language input, which
risks delaying their language development. To aid these parents, we design
Captivate!, the first system that provides contextual language guidance to
parents during play. Our system tracks both visual and spoken language cues to
infer targets of joint attention, enabling the real-time suggestion of
situation-relevant phrases for the parent. We design our system through a
user-centered process with immigrant families--a highly vulnerable yet
understudied population--as well as professional speech language therapists.
Next, we evaluate Captivate! on parents with children aged 1-3 to observe
improvements in responsive language use. We share insights into developing
contextual guidance technology for linguistically diverse families.
