THREAD: 12 Things Everyone Should Know About IQ

1. IQ is one of the most heritable psychological traits – that is, individual differences in IQ are strongly associated with individual differences in genes (at least in fairly typical modern environments).

2. The heritability of IQ *increases* from childhood to adulthood. Meanwhile, the effect of the shared environment largely fades away. In other words, when it comes to IQ, nature becomes more important as we get older, nurture less.
3. IQ scores have been increasing for the last century or so, a phenomenon known as the Flynn effect. (N ≈ 4 million)

(Note that the Flynn effect shows that IQ isn't 100% genetic; it doesn't show that it's 100% environmental.)
4. IQ predicts many important real world outcomes.

For example, though far from perfect, IQ is the single-best predictor of job performance we have – much better than Emotional Intelligence, the Big Five, Grit, etc.
5. Higher IQ is associated with a lower risk of death from most causes, including cardiovascular disease, respiratory disease, most forms of cancer, homicide, suicide, and accident. (N = 728,160)
6. Higher IQ is associated with lower rates of most forms of mental illness. (N = 1,049,663)
7. More generally, IQ tests are among the most reliable, predictive measures in psychology – one of the field's crowning achievements.

If IQ isn't a valid concept, no concept in psychology is valid.
8. Despite this, many people are allergic to the concept of IQ. Ironically, this includes many intellectuals.
9. Perhaps as a result, there's some evidence that researchers are less likely to publish studies showing a link between IQ and grades – the reverse of the usual publication bias for positive findings.; although see
10. The antipathy to IQ is unfortunate. IQ predicts all things good. Interventions to boost IQ (such as salt iodization) could greatly enhance human well-being.

Conversely, IQ-denial could cause real harm by stalling the development of such interventions.
11. IQ testing has other potential benefits as well. One of my favourite studies of the last few years found that universal IQ screening boosts the number of poor, female, and minority students in gifted education.

12. Last but not least, here's a list of ten common myths about IQ. HT @StuartJRitchie

More from Life

This month I’m turning 22.

To celebrate, here are the 22 best threads I’ve found on Twitter this year.

Mostly about:

•Clarity of thought

If I see more interesting threads, I will add to this list.


1. @ryanstephens: Need tips on growing a newsletter, mastering Twitter, writing online?

@ryanstephens breaks down a podcast discussion between @davidperell and @nathanbarry

Here’s what you can

2. @jackbutcher: How to separate your time from your income

•Explore the market
•Build equity
•Build products and services
•Scale your reputation
•Break the matrix

A fantastic thread complete with helpful

3. @AlexAndBooks_: I love to read.

Here is a great thread on 10 fantastic books.

Includes a short summary of each.

Don’t just take it from me, this is straight from the legend: @AlexAndBooks_

4. @m_franceschetti My biggest revelation in 2020 was the importance of sleep.

Here, @m_franceschetti founder of @eightsleep gives us his eight sleep hacks to improve sleep for 2021.

Do these and your productivity will

You May Also Like

Nano Course On Python For Trading
Module 1

Python makes it very easy to analyze and visualize time series data when you’re a beginner. It's easier when you don't have to install python on your PC (that's why it's a nano course, you'll learn python...

... on the go). You will not be required to install python in your PC but you will be using an amazing python editor, Google Colab Visit

This course is for anyone out there who is confused, frustrated, and just wants this python/finance thing to work!

In Module 1 of this Nano course, we will learn about :

# Using Google Colab
# Importing libraries
# Making a Random Time Series of Black Field Research Stock (fictional)

# Using Google Colab

Intro link is here on YT:

Create a new Notebook at and name it AnythingOfYourChoice.ipynb

You got your notebook ready and now the game is on!
You can add code in these cells and add as many cells as you want

# Importing Libraries

Imports are pretty standard, with a few exceptions.
For the most part, you can import your libraries by running the import.
Type this in the first cell you see. You need not worry about what each of these does, we will understand it later.