L4 Lab at the University of Arizona

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Tucson, AZ
L4 Lab at the University of Arizona

L4 stands for: language, learning, literacy, and lexicon, which are the topics of most interest to the founders of the L4 Lab.

🗣 Language, Learning, Literacy, Lexicon: Learning how these 4 topics interact in communication
👩‍💼 PI: Mary Alt, PhD, CCC-SLP
📍 University of Arizona
1131 E. 2nd St., Tucson, Arizona 85721 The lab was originally co-directed by Mary Alt and Tiffany Hogan, but since Dr. Hogan moved to Nebraska, it is now a single-director operation. We tend to have lots of graduate and undergraduate students contrib

uting to the quest to understand the 4 L's. Take a look around our web page to find out more about our lab and our research.

06/15/2026

We are continuing to seek participants for a virtual toddler vocabulary study! Thank you to those who have already signed up and/or shared!

Study details:
-It’s open to families anywhere in the United States.
-It's for 2-year-olds with typical communication and overall development. (This is not a treatment study).
-Parents will complete a questionnaire and fill out checklists about their child's vocabulary.
-Children must hear only English at home.
-Parents will receive a summary of their child's results after completing both sets of checklists.

Intake form: https://redcap.link/mx7hdyec

Email: [email protected]

Text: ‪(520) 369-3395‬

06/09/2026

We had a wonderful time at SRCLD 2026! The L4 Lab team--both current students and alum--did a fantastic job presenting the meaningful work they're conducting. Here are some of our SRCLD memories!

04/24/2026

Our lab at the University of Arizona is doing an in-person treatment study to learn what helps 2- and 3-year-olds say more words.

Children must be 2 or 3 when they start treatment, but families can sign up before children are 2!

Contact us at (520) 276-8709 or [email protected]

04/21/2026

Our lab is conducting a remote research study to learn about vocabulary in typically-developing 2-year-olds!
Intake form here: https://redcap.link/mx7hdyec (or email: [email protected])

04/07/2026

So excited to have our lab's work featured on the The Informed SLP!!

03/12/2026

Our lab at the University of Arizona is conducting a remote research study to learn about vocabulary in typically developing 2-year-olds!
Complete the intake form here: https://redcap.link/mx7hdyec (or email: [email protected])

03/03/2026

We’re excited to share that our first TALK study has been published!

We are so grateful to the families and students who helped make this study possible and deepen our understanding of what happens beyond toddlerhood!

Abstract: https://pubmed.ncbi.nlm.nih.gov/41557787/

Stay tuned for more findings :)

Learn more about late talking: https://sites.arizona.edu/vault-learning/

Heidi Mettler

01/27/2026

Our lab at the University of Arizona is conducting a remote research study to learn about vocabulary in typically-developing 2-year-olds!
Complete the intake form here: https://redcap.link/mx7hdyec or email: [email protected]

01/08/2026

🧠 Our lab at the University of Arizona is doing a treatment study to learn what helps toddlers say more words.
📱 Contact us at (520) 276-8709 or [email protected] for more info & to see if your child qualifies!

12/16/2025

📣 Does your 2- or 3-year-old use fewer words than expected?
🧠 Our lab at the University of Arizona is doing a treatment study to learn what helps toddlers say more words.
📱 Contact us at (520) 276-8709 or [email protected] for more info & to see if your child qualifies.

Address

Tucson, AZ
85721

Telephone

+15202768709

Website

https://sites.arizona.edu/lfour-lab/

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