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Research Reports

Latest Research Reports

A flyer titled “Does An Early Childhood Program’s Star Rating Reflect What Children Actually Experience?” features a woman and child playing with toys, research statistics, and text about LENA’s studies on early childhood program ratings.
Does an Early Childhood Program’s Star Rating Reflect What Children Actually Experience? 
Do quality improvement ratings reflect how many conversational turns individual children experience?...
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A brochure titled "From Isolation to Interaction: A Data-Driven Path Forward" shows a woman interacting with a smiling baby. The page includes text sections, a pie chart, and the LENA logo at the top.
From Isolation to Interaction: A Data-Driven Path Forward 
Approximately 1 in 8 children in early education settings spends most of their day in language isolation....
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A brochure titled “The TS GOLD® Evidence: How LENA Grow Impacts Child Development” shows a woman and a young girl playing with toys, a findings summary, and a chart illustrating language growth progress.
The TS GOLD® Evidence: How LENA Grow Impacts Child Development
In a study of children aged 0-5 at five early learning sites across the U.S., children in LENA Grow classrooms experienced significantly larger gains in TS GOLD language scores compared to a...
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A brochure titled "Teacher Experience, Training, and Conversational Turns" from LENA features a teacher holding a young child in a classroom, with sections of text and colorful design elements.
Teacher Experience, Training, and Conversational Turns 
How do teacher experience, credentialing, and education shape early childhood language environments?...
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A fact sheet titled “LENA Grow’s Impact on CLASS® Scores” displays text, bar graphs, and purple accent colors. The sheet discusses study results about LENA Grow’s positive effects in Pre-K classrooms.
LENA Grow’s Impact on CLASS® Scores 
How does participating in LENA Grow impact CLASS scores? Data from five different evaluations spanning 2018-2025 show a clear, positive answer....
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A research report titled "Classroom Ratios + Conversational Turns" by LENA features text, colorful graphs, and a classroom photo. The page details conversational interaction data and recommendations for classroom quality.
Classroom Ratios + Conversational Turns 
Teacher-child ratios — the number of teachers vs. children in a classroom — are a major factor in classroom quality....
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A research report titled "LENA Grow and Self-Esteem in Young Children" with a purple header, summary text, a photo of a child and adult, tables, and graphs about conversational turns and self-esteem.
LENA Grow and Self-Esteem in Young Children
In this report, we examine the role conversational turns may play in a child’s early development of self-esteem....
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Infographic explaining conversational turns, highlighting their impact on brain function and structure in children, with colorful sections and text about the importance of interactive communication.
Research on Conversational Turns
Conversational turns are simple back-and-forth alternations between a child and an adult. They're simple, but they're also powerful....
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A cover image with a purple background titled "Inside Early Talk" by LENA, featuring photos of adults and children interacting, surrounded by colorful abstract shapes.
Inside Early Talk
In this report, we're excited to share never-before-seen early talk we've collected on over 10,000 children annually impacted by our programs....
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Free Webinar:
What Is a language environment? Making Space for Every Child’s Voice

This webinar reveals the hidden crisis of language isolation and shows how interaction-focused language environments drive child outcomes and help tackle some of the toughest challenges in early childhood education. Read more here > 

March 5th at 1:00 p.m. ET

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