Person:

Leech, Kathryn

Individual differences in children’s language skills have been shown to stem in part from variations in the quantity and quality of parent speech input. However, most research focuses on mothers’ input whereas less is known about the effects of variability in father input. In this article, we review the relation between parent input and child language development with a focus on low-income families, and review general findings about similarities and differences in mother and father speech. Within this review, we highlight conversation-eliciting speech, such as wh questions and clarification requests, which occur, on average, more frequently in father input than mother input. Conversation-eliciting speech is challenging for 2-year-old children and has been shown in research with mothers to relate to child vocabulary development.We then report a study examining whether fathers’ use of conversation-eliciting speech relates to children’s developing vocabulary skills at 24 months of age within a sample of lowincome African American families. Understanding that speech input varies among fathers, and specific strengths that fathers bring to interactions with their young children can help speech-language pathologists develop and implement more effective interventions.

Discussions that occur during book reading between parents and preschool children relate to children’s language development, especially discussions during picture books that include extended discourse, a form of abstract language. While a recent report shows increased chapter book reading among families with preschool children, it is unknown whether chapter books also facilitate these types of conversations. Further, the substantial variation in preschoolers’ language ability raises the question of whether chapter book reading may be beneficial for all children of this age. The current study examined the discussions between five-year-old children (N = 33) and their parents while reading both a picture book and the first chapter of a chapter book. Findings are discussed in terms of the variation observed in the amount and types of discussion, how chapter book discussions compare to picture book discussions, and finally, how children’s narrative skill can serve as an indicator of children’s ability to participate in discussions, especially during chapter book reading.

Background: A growing body of research suggests that fine motor abilities are associated with skills in a variety of domains in both typical and atypical development. In this study, we investigated developmental trajectories of fine motor skills between 6 and 24 months in relation to expressive language outcomes at 36 months in infants at high and low familial risk for autism spectrum disorder (ASD). Methods: Participants included 71 high-risk infants without ASD diagnoses, 30 high-risk infants later diagnosed with ASD, and 69 low-risk infants without ASD diagnoses. As part of a prospective, longitudinal study, fine motor skills were assessed at 6, 12, 18, and 24 months of age and expressive language outcomes at 36 months using the Mullen Scales of Early Learning. Diagnosis of ASD was determined at the infant’s last visit to the lab (18, 24, or 36 months) using the Autism Diagnostic Observation Schedule. Results: Hierarchical linear modeling revealed that high-risk infants who later developed ASD showed significantly slower growth in fine motor skills between 6 and 24 months, compared to their typically developing peers. In contrast to group differences in growth from age 6 months, cross-sectional group differences emerged only in the second year of life. Also, fine motor skills at 6 months predicted expressive language outcomes at 3 years of age. Conclusions: These results highlight the importance of utilizing longitudinal approaches in measuring early fine motor skills to reveal subtle group differences in infancy between ASD high-risk and low-risk infant populations and to predict their subsequent language outcomes. Electronic supplementary material The online version of this article (10.1186/s11689-018-9231-3) contains supplementary material, which is available to authorized users.