| Infant vocabulary development is influenced by caregiver language input.Numerous studies have investigated the quality of caregiver inputrelating to later infant vocabulary size; however,caregiver use of questions has not been investigated as aquality input measure. Accordingly, the purpose of this study wasto determine how the quantity of caregiver input, caregiver use of wh-questions andotherquestion forms, and caregiver use of statements presented to infantsrelatedto later vocabulary skill. Archived data from14 caregiver-infant dyads were exploredin this study. It was hypothesizedthat types of questions posed by caregivers toinfants between 6 to 18 months of age would support later vocabulary development. Results indicated some statistical significance between groups, and effect size values suggested substantial clinical significance.Findings from the study can be used by speech-language pathologists to provide caregiver education regarding the impact of question forms on potential vocabulary development in infants. Key Words:quantity and quality of caregiver input, question forms, infants, caregivers, vocabulary development, speech language pathology |