Kathryn Leech

Harvard University | Harvard · Harvard Graduate School of Education

Parent–child engagement in constrained (e.g., learning alphabet letters or sounds) and unconstrained (e.g., storytelling, defining words) literacy activities are central components of the home literacy environment. Unconstrained activities are particularly important for children’s oral language and support school readiness. Yet, many parents do not...

Narrative language abilities are foundational to literacy development and are a culturally grounded measure of early literacy for Latino children. This study evaluates the impacts on narrative language abilities and the costs of a 4-week, strengths-based program that leverages two valued sociocultural practices with built-in benefits, personal narr...

It is well-established that participation in shared book reading interactions with caregivers supports children's early language and literacy development. Most of this literature focuses on reading experiences during the preschool period. Less is known about the nature and importance of such practices during infancy. Therefore, the goal of this stu...

In the current study, we provide a systematic understanding of how early childhood educators (N = 209) believe that they would respond to children's scientific questions. We compared 105 inservice preschool and early elementary grade teachers’ and 104 preservice teachers’ responses on an online survey consisting of 3 parts: (a) responses to childre...

Children's mathematical knowledge at school entry varies considerably and predicts long‐term achievement outcomes. Differences in children's exposure to math and number talk at home may help to explain variations in school‐entry math ability. However, nearly all research on exposure to math and number talk has been conducted with parents and presch...

Little is known about young children's ability to talk about absent members of their social network. We analyzed the speech of four children from 2 to 5 years. References to absent caregivers were relatively frequent, even when children were 2 years old. Such references were often generated spontaneously rather than being repetitions of a name prod...

Caregivers' use of decontextualized language (DL), language that is abstract or removed from the here and now, supports preschool-aged children's language, cognitive, and social-cognitive development. Studies comparing caregiver-child DL across cultures have focused primarily on one type of DL-past narratives. Very few studies have examined cross-c...

This study examined the effects of two pedagogical training approaches on parent-child dyads’ discussion of scientific content in an informal museum setting. Forty-seven children (mean age = 5.43) and their parents were randomly assigned to training conditions where an experimenter modeled one of two different pedagogical approaches when interactin...

Behavioral and neural evidence indicates that young children who engage in more conversations with their parents have better later language skills such as vocabulary and academic language abilities. Previous studies find that the extent to which parents engage in conversational turn-taking with children varies considerably. How, then, can we promot...

We examined the relations between the referent of parents' and preschoolers’ mental state talk during a collaborative puzzle-solving task (N = 146 dyads; n = 81 3-year-olds, n = 65 4-year-olds). The results showed that parents’ references to their own knowledge and beliefs (self-referent cognitive talk), and references to their child’s knowledge an...

Purpose This response addresses comments made by Marcotte (2019) regarding our recent publication, “Preliminary Evidence That Growth in Productive Language Differentiates Childhood Stuttering Persistence and Recovery” ( Leech, Bernstein Ratner, Brown, & Weber, 2017 ). Marcotte calls into question our finding that language growth is a valid predicto...

Prospection, the ability to engage in future-oriented thinking and decision making, begins to develop during the preschool years yet remains far from adult-like. One specific challenge for children of this age is with regard to thinking and reasoning about their future selves. Drawing from work indicating the importance of adult–child conversation...

Socioeconomic disparities in children's early vocabulary skills can be traced back to disparities in gesture use at age one and are due, in part, to the quantity and quality of communication children are exposed to by parents. Further, parents’ mindsets about intelligence contribute to their interactions with their children. We implemented a parent...

INTRODUCTION. The early home environment is critical for laying a strong numerical foundation for young children’s development. Participation in math-related informal learning activities in the home is associated with caregiver and child talk about math; however, it is unclear which activities promote different types of math talk. METHOD. We observ...

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...

Preschool children’s use of decontextualized language, or talk about abstract topics beyond the here-and-now, is predictive of their kindergarten readiness and is associated with the frequency of parents’ own use of decontextualized language. Does a brief, parent-focused intervention conveying the importance of decontextualized language cause paren...

Purpose: Childhood stuttering is common but is often outgrown. Children whose stuttering persists experience significant life impacts, calling for a better understanding of what factors may underlie eventual recovery. In previous research, language ability has been shown to differentiate children who stutter (CWS) from children who do not stutter,...

The ability to act on behalf of one’s future self is related to uniquely human abilities such as planning, delay of gratification, and goal attainment. Although prospection develops rapidly during early childhood, little is known about the mechanisms that support its development. Here we explored whether encouraging children to talk about their ext...

Differences in caregiver input across socioeconomic status (SES) predict syntactic development, but the mechanisms are not well understood. Input effects may reflect the exposure needed to acquire syntactic representations during learning (e.g., does the child have the relevant structures for passive sentences?) or access this knowledge during comm...

Variations in the recruitment of syntactic knowledge contribute to SES differences in syntactic development* – ERRATUM - KATHRYN A. LEECH, MEREDITH L. ROWE, YI TING HUANG

Average differences in children's language abilities by socioeconomic status (SES) emerge early in development and predict academic achievement. Previous research has focused on coarse-grained outcome measures such as vocabulary size, but less is known about the extent to which SES differences exist in children's strategies for comprehension and le...

There are clear associations between the overall quantity of input children are exposed to and their vocabulary acquisition. However, by uncovering specific features of the input that matter, we can better understand the mechanisms involved in vocabulary learning. We examine whether exposure to wh-questions, a challenging quality of the communicati...

Many children in the United States begin kindergarten unprepared to converse in the academic language surrounding instruction, putting them at greater risk for later language and reading difficulties. Importantly, correlational research has shown there are certain experiences prior to kindergarten that foster the oral language skills needed to unde...

Fathers' child-directed speech across two contexts was examined. Father-child dyads from sixty-nine low-income families were videotaped interacting during book reading and toy play when children were 2;0. Fathers used more diverse vocabulary and asked more questions during book reading while their mean length of utterance was longer during toy play...

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 whethe...

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 langu...