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Edward Gibson: Human Language, Psycholinguistics, Syntax, Grammar & LLMs | Lex Fridman Podcast #426

Lex Fridman | July 21, 2026



Edward Gibson is a psycholinguistics professor at MIT and heads the MIT Language Lab. Please support this podcast by checking out our sponsors:
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TRANSCRIPT:
https://lexfridman.com/edward-gibson-transcript

EPISODE LINKS:
Edward’s X: https://x.com/LanguageMIT
TedLab: https://tedlab.mit.edu/
Edward’s Google Scholar: https://scholar.google.com/citations?user=4FsWE64AAAAJ
TedLab’s YouTube: https://youtube.com/@Tedlab-MIT

PODCAST INFO:
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Apple Podcasts: https://apple.co/2lwqZIr
Spotify: https://spoti.fi/2nEwCF8
RSS: https://lexfridman.com/feed/podcast/
Full episodes playlist: https://www.youtube.com/playlist?list=PLrAXtmErZgOdP_8GztsuKi9nrraNbKKp4
Clips playlist: https://www.youtube.com/playlist?list=PLrAXtmErZgOeciFP3CBCIEElOJeitOr41

OUTLINE:
0:00 – Introduction
1:13 – Human language
5:19 – Generalizations in language
11:06 – Dependency grammar
21:05 – Morphology
29:40 – Evolution of languages
33:00 – Noam Chomsky
1:17:06 – Thinking and language
1:30:36 – LLMs
1:43:35 – Center embedding
2:10:02 – Learning a new language
2:13:54 – Nature vs nurture
2:20:30 – Culture and language
2:34:58 – Universal language
2:39:21 – Language translation
2:42:36 – Animal communication

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Written by Lex Fridman

Comments

This post currently has 24 comments.

  1. @lexfridman

    July 21, 2026 at 4:39 am

    Here are the timestamps. Please check out our sponsors to support this podcast.

    Transcript: https://lexfridman.com/edward-gibson-transcript

    0:00 – Introduction & sponsor mentions:

    – Yahoo Finance: https://yahoofinance.com

    – Listening: https://listening.com/lex and use code LEX to get one month free

    – Policygenius: https://policygenius.com/lex

    – Shopify: https://shopify.com/lex to get $1 per month trial

    – Eight Sleep: https://eightsleep.com/lex to get special savings

    1:13 – Human language

    5:19 – Generalizations in language

    11:06 – Dependency grammar

    21:05 – Morphology

    29:40 – Evolution of languages

    33:00 – Noam Chomsky

    1:17:06 – Thinking and language

    1:30:36 – LLMs

    1:43:35 – Center embedding

    2:10:02 – Learning a new language

    2:13:54 – Nature vs nurture

    2:20:30 – Culture and language

    2:34:58 – Universal language

    2:39:21 – Language translation

    2:42:36 – Animal communication

  2. @chariotsoffire2714

    July 21, 2026 at 4:39 am

    There is a book on using English syntax intentionally as a wellness tool. Its kind of like an "applied" psycho linguistics. Moving from theory into a self help practice. Its called "Harmonic Linguistics" by Michael Goldstein and its quite cool.

  3. @namuunbaatar6800

    July 21, 2026 at 4:39 am

    how do we keep track of what the person we are speaking knows based on what I said before during the conversation? like if I mention someone, then after awhile, i can say "she" with no additional details, because I am keeping track of the other person knows who I am talking about. but that seems very difficult.

  4. @petros10437

    July 21, 2026 at 4:39 am

    So the Piraha use a 4system. You should ask for 12. They change their numerical words for 4 and 8 … so you should ask for 12. I guess they use their fingers (minus the thumb) as their reference.

  5. @martinsmith6049

    July 21, 2026 at 4:39 am

    Scratching my head on a tribe that doesnt have more than one… scientists have worked out prey birds can count to three (four hunters going into a hide, then three leaves is too much for them, but 3 hunters and two leaving they know there is a remaining predator).

  6. @mohammedfadil-u6s

    July 21, 2026 at 4:39 am

    Hello professor! I had hundreds and hundreds of exercises concerning tree diagram of sentences but one time when I was drawing a tree, I thought if I could draw a tree diagram of a sentence yet I'm going to do it in terms of function of words instead of displaying their nature so instead of writing "the boy" as noun phrase and the break it down into determiner and a noun, I am going to put subject for the whole combination and then moving to the next combination or phrase and so on … what you think about this ?

  7. @aluxt

    July 21, 2026 at 4:39 am

    I'm a linguist, working at a top 3 English dictionary. I do not believe all language is fundamentally a tree structure. Rather, western grammar, which is a very useful but reductive tool, imposes a tree structure on language.

  8. @ademiramaral1734

    July 21, 2026 at 4:39 am

    1:06:31 In the texts written by classical latin writers, like Cicero, the words don't have short dependencies. Cicero's entire text in each book is like a puzzle of words — once you see the connections between each word the text becames clear.

  9. @thisthingcalledAnne

    July 21, 2026 at 4:39 am

    Listening to this with my 13 year old son, I had to pause the video to have a conversation volley playing with increasing distance between dependent words. It was hilarious and fun for both of us:) Grateful for these moments together with laughter and learning. Thanks for sharing your work with us! Also loved the animal communication section. I’m learning Chicken currently and can say a few things to them (for example: “predator in the sky!” and “come here, I found something interesting for you.”)

  10. @DnBComplex

    July 21, 2026 at 4:39 am

    I have no internal monologue and until recently I thought that the term "inner voice" was just a figure of speech.
    When I hear words or think or read my mind makr images and feelings. Hearing the word "anger" makes me angry, hearing the word "bird" makes feel like a bird…
    Inner monologue people seem to be living differently I guess.😮😮

  11. @Philipp-k4d

    July 21, 2026 at 4:39 am

    Мальчик заплакал. Мальчик в лучах теплого солнца на прекрасной поляне с запахами пряных трав и разноцветных цветов поддавшись эмоциям заплакал. Вроде ничего сложного.

  12. @netizencapet

    July 21, 2026 at 4:39 am

    My theory for legalese central-embedding: warding off adversarial misquotation. If we include a reference to the def in a parenthetical clause, it reduces the chance an adversary can argue that the contract meant something else than it did in a given section.

  13. @LookingForAnotherPlanet

    July 21, 2026 at 4:39 am

    I feel relieved that I'm not the only one that doesn't have an inner voice (that I'm aware of). People have asked me if I dream in French or English, but I don't remember language having been involved in my dreams.

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