Uploaded July 2022 | Updated September 2026, 2 weeks ago

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Is our personality shaped by the environment, or are we largely programmed genetically? No one can answer whether nature or nurture leads to certain traits in individuals. We do know, however, a bit about the influences of genes and the environment when it comes to groups of specific populations — especially when we talk about us humans. Our understanding of little asexual crayfish seems rather limited.

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This video was made with the support of our Patrons: Andrea Basilio Rava, Angela, Ann Hufstader, ArkiTechy, Artur, Badrah, best4all pez, Brilliant Minds Learning, C, Cedric.Wang, Daniel Kramer, Denis Kraus, Digital INnov8ors, Dr. Matthias Müller-Mellin, Duane Bemister, Esther Chiang, Eva Marie Koblin, Floris Devreese, Frari63, Gatsby Dkdc, Ginger, ICH KANN DEUTSCH UND ES WAR EINFACH!, Jana Heinze, Jannes Kroon, Jeffrey Cassianna, Joanne Doyle, Johan Klassen, John Burghardt, Jonathan Schwarz, Jorge Luis Mejia Velazquez, Juliet Hutchings, L Efre, Leonel, Liskaya, Marcel, Marco VanGuff, María, Marq Short, Mathis Nu, Matthias Ruck, Mezes.Macko, MiyuPON!!, Muhammad Humayun, Nicki, Okan Elibol, Paul Hopkins, Peter Bishop, Petra, Raymond Fujioka, Robert Cook, scripz, Si, Stefan Gros, Stephen, Stephen Clark, Stuart Bishop, Susan Schuster, Tetiana Gerasymova, Tristan Scifo, Victor Paweletz, Wolfgang Vullhorst, Yohanan Schwartzman, Yvonne Clapham and all the others.Thank you! To join them visit patreon.com/sprouts

COLLABORATORS
Script: Jonas Koblin
Artist: Pascal Gaggelli
Voice: Matt Abbott
Coloring: Nalin
Editing: Peera Lertsukittipongsa
Production: Selina Bador, Morgan Lizop
Fact-checking: Ludovico Saint Amour Di Chanaz
Sound Design: Miguel Ojeda

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Watch Robert Sapolsky explain Heritability as part of his famous Stanford lecture on Behavioral Genetics
econtalk.org/michael-blastland-on-the-hidden-half about Nature, Nurture, Crayfish and all the things we don’t know yet
To study how the environment impacts personality traits, researchers like to observe the upbringing of children in settings where we can eliminate some variables and better control for differences. In particular they look at two forms of twin studies. Non-identical twins who are raised in the same family — they experience a similar environment, but just like most siblings share 50% of their DNA. Identical twins who are raised in different families: In these rare instances, the twins share the same genes (in fact not all identical twins share the same genes), but were given up for adoption at birth and are therefore raised in completely different environments.
Identical twins have not always identical genes businessinsider.com/identical-twins-do-not-always-have-identical-genes-study-2021-1

SOURCES
Genetic and environmental influences on adult intelligence and special mental abilities
pubmed.ncbi.nlm.nih.gov/9549239

scientificamerican.com/article/how-much-of-human-height
Dr. Chao-Qiang Lai has written this article in his personal capacity and the views expressed do not necessarily represent the views of the U.S. Department of Agriculture, Agricultural Research Service.

https://www2.psy.uq.edu.au/~uqbziets/Mosing_et_al_2009_Optimism_and_wellbeing.pdf

Impact of Genes on Education Achievements
researchgate.net/publication/315896700_G_is_for_Genes_The_Impact_of_Genetics_on_Education_and_Achievement

CLASSROOM EXERCISE
To read more about suggested classroom activities for this topic, check out our website sproutsschools.com

CHAPTERS
00:00 Introduction
01:00 Nature vs Nurture
01:55 A measurement of differences in traits
02:34 Heritability
03:35 Heritability of height
05:03 Heritability of IQ
06:40 The crayfish observation
07:31 What do you think?
07:56 Patrons credit
08:05 Ending


#psychology #personality #sproutslearning #naturevsnurture #heritability