What is Heritability? (Intro Psych Tutorial #38)

In this video I provide a basic introduction to twin studies and heritability scores. I explain how a heritability score tells us about the role of genes in explaining variance in a trait. I also discuss some common errors and emphasize that heritability is about the role of genes in general, not about specific genes, and that it only tells us about groups of people, not individuals. I also discuss some hypothetical examples that illustrate how differences in environments can influence heritability scores.

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[sadieADHD]

I've been trying to get my head around heritability, watched lots of videos. I now understand it after watching this, thank you for explaining it so well!

[nikhilbele]

Better explained than most of the videos I came across, really sorted out things for me. Thank you so much for the video.

[leilacx]

This is great, I wish I came to this video sooner. No one seems to explain it like you.
Thank you.

[elderfishes]

I have attempted to understand explanations of heritability given by many different teachers over 5 years, and your explanation has finally made me understand the concept. Very clear. A very huge thanks to you.

[jenniferriegel]

You explained that counter-intuitive heritability score between the different extremes very well, thank you! That makes the concept of heritability much more clear.

[ceciliacroguennec]

This was extremely helpful, thank you so much! I also find the condensed notes you write really helpful - they make it easy to follow along and extract the key concepts but also allow me to keep focused on what you're saying!

[raininglavender]

wow this video deserves more views, such a great explanation!!

[vanessabodylski]

Thank you for being so clear and concise. I couldn't understand the P/S KA video on this topic.

[kamalaujla]

Really helpful, you clarified the concept well. Thank you 😊

[dakotaconner]

This was an excellent explanation that really cleared up the concept for me. Thank you

[kevinkeable]

Brillian explanation thank you. I was struggling with this concept until I watched your video.

[taskd]

Best youtube video on heritability ever!!
Thank you!!

[sivaniy.s.k.]

Thank you so much!❤❤The topic was well explained!

[adeol]

This was a super explanation. Thank you very much for making the video

[englishwithanes]

Can you please explain the concept of "range of reaction" please ??
Not necessarily make a whole video but just really quick here 🙏🏻

[anastasiachronopoulou]

Thank you so much for breaking this down so well ❤️

[fitnesscorner]

Very helpful and informative session 💖

[asianboyfly]

Thank you! Did better than my lecturer!

[luvisacigarette]

Question: does it ever make sense to compute a heritability score on something with extremely low variance? For example, according to this score the heritability of being born with two eyes is close to 0. However, clearly our genetic code is why humans have two eyes. It’s counterintuitive

[ASIANdidUrmOm]

Great video! So basically, heritability would be the ratio of "genetic variation : environmental variation, " assuming a phenotypic difference in the population is present? Also, please let me know what you think of this case: Six genetically identical twins are all reared in vastly different environments, but their IQ test performance is identical. Since no phenotypic variation is present, would the heritability still be zero? This case has bothered me for a while, haha!