Harry Kahne’s Multiple Mentality Course: An In-Depth Review

harry kahne multiple mentality feature imageHow would your life improve if you could perform six mental operations at the same time?

Do you think it would help you tap into more of your brain power?

Harry Kahne certainly did.

And he proved it many times, often by writing out quotes from books in both hands while talking to his audience about other topics. 

The strangest part?

He claimed his mind was perfectly average. He told thousands of people around the world that anyone could perform multiple operations at the same time. 

I agree, and here is why:

I’ve been practicing exercises from Harry Kahne’s Multiple Mentality Course for years. Although I can’t perform many of his impressive students, here are a few benefits I’ve experienced along the way:

  • Sharper thinking
  • More free time
  • Improved numeracy
  • Better memory
  • Useful mental connections
  • Enhanced abilities with memory techniques.

Of course, I’m not practicing these techniques to deliver stunt performances… the odd time I might recite the alphabet backwards while juggling:


The real reason I perform demonstrations is to aid my research into how to use memory techniques better. I’m also constantly crafting new brain exercises so others can experience mental sharpness that lasts.


For one thing, there’s a lot of warnings out there against multitasking out there – most of them very good. 

a picture depicting a brain while multitasking

Normally, we’re told to avoid multitasking. But is this always a good thing?

But when it comes to using mnemonic devices to memorize, say, all the names in a packed room, we definitely need to multitask in our minds.

Directing multiple mentality at our use of memory techniques seems to me the finest possible use.

So let’s dive deeper into who Harry Kahne was and what multiple mentality is all about. 

Who Was Harry Kahne?

Harry Kahne proved that multitasking is indeed possible. 

He demonstrated this by performing demonstrations where he would write upside down with one hand, backwards with the other, all while reciting poetry.

Harry Kahne proved that multitasking is indeed possible

Harry Kahne solving a crossword puzzle upside down and backwards while reciting memorized information.

Or, he might solve complex calculations with his feet while speaking to his audience as his hands wrote out newspaper headlines from memory.


Born in 1894, Kahne said that he started practicing multiple mentality during school. His teachers kept catching him daydreaming, so he devised a way to read his school books and daydream at the same time.


Derren Brown

Derren Brown

By the time the 1920s rolled around, Kahne was touring as The Incomparable Mentalist.

I don’t know if Harry Loryane ever saw Kahne demonstrate his skills, but certainly these kinds of performances were common on the vaudeville circuit at that time. These days, Kahne’s work looks more like what we see from mentalist Derren Brown.

To help other people learn how to perform several operations at once, he explained how others can practice the same “mental gymnastics” he used to develop his skills. 

Multiple Mentality Course Review

Hopping into a time machine to attend a live lecture with Kahne is sadly not possible (yet). 

But we can find a PDF or webpage version of his teaching, and it is incredibly helpful. 

Here’s what you’ll learn:

One: Why People Fail To Exercise Their Minds

Kahne feels that schools focus more on socializing individuals than it teaches them to think. He also points to modern comforts as a source of weakening the mind, citing earlier survival requirements as being essential to better thinking.

Although I think Kahne is right that needing to hunt, farm, build shelter and raise a family without the luxuries of contemporary medicine required more thinking, I don’t quite agree.

For one thing, those skills have very little to do with writing poetry in reverse with your hands while verbally solving math problems. 

harry kahne solving a crossword puzzle

Also, we have the problem that the very reason we have so many luxuries comes from masses of people who have developed improved thinking skills. Kahne’s historical fallacy in this regard suggests that his objective reasoning might not have been as improved by multiple mentality as he claims.

Nonetheless, Kahne is correct that all of us need “warming up” when it comes to using our mental abilities better. In fact, this point shows up in creativity studies.

people are warming up

Just like your body needs warming up before exercising, your brain needs it too.

For example, Dr. Robert Epstein is a leading authority on creativity. In numerous articles, many gathered in his book, Cognition, Creativity, and Behavior, Epstein shows how a quick warmup improves creativity, focus and attention while engaged in more complex tasks. 

This is why I like to quickly memorize a deck of cards or juggle while reciting the alphabet backwards before sitting down to do any writing or language learning.

Two: Alphabet Exercises

Kahne explains that these are the most important aspects of his training. Having practiced them myself, I can see why.

First, he asks you to write out the alphabet backwards… from memory. Unfortunately, he doesn’t teach you how to memorize it in reverse order, and gives the bad advice that you should write it out 50 times to learn it.

That’s too much work! So to reduce all of that unnecessary repetition, I teach you how to memorize it backwards in the Magnetic Memory Method Masterclass

wooden alphabet

In addition to working with the alphabet in reverse order, Kahne asks you to:

  • Pair the alphabet’s extreme ends by mentally reciting them, i.e. A-Z, B-Y, C-X, etc.
  • Start at the center of the alphabet and pair them in reverse order

I would also suggest that you learn the number of each alphabet letter. You can rapidly do this by using the pegword method and a Memory Palace.

Three: Writing and Verbal Exercises

Starting with 3-letter words, Kahne asks you to write one word while spelling another out loud. 

For example, as you write S-K-Y to spell “sky,” you would spell pen, i.e. P-E-N.

It’s actually trickier than it seems – give it a try!

Next, work on writing one word forwards while verbally spelling it backwards. Then, write a different word backwards while verbally spelling it forward.

From there, move on to 4-letter words and beyond.

a tent and trees

There are many ways to increase the challenge of Kahne’s multiple mentality exercises. For example, you can visualize other things while performing them.

For an additional challenge, try visualizing something completely different. For example, as you’re spelling “tree” and writing “cart,” imagine a tent.

Four: Write Words From Memory

Kahne asks you to find forty words and write them on paper.

Then he asks you to crumple the paper up and write all those words again on a fresh piece of paper. 

I think he’s quite misguided in asking you to repeat this 25 times or more. You could just learn how to memorize vocabulary and get the list correct the first time.

For a great word generator, I suggest the IAM memory training website. It generates words, numbers and other memory competition-related material for you. It also lets you test your results.

Or you can just grab a deck of cards and memorize those.

playing cards

Memorizing playing cards is a powerful form of brain exercise that uses multiple parts of your mind.

Five: Recite Poetry While Writing Your Name And Address

Now we’re talking!

Although Kahne gives no instructions on how to memorize poetry, this is a great exercise. 

As Kahne points out, however, your address is going to be rather easy. 

To increase the difficulty, recite a poem while writing out the address of a friend. 

Six: Word Recombination

Next, Kahne suggests that you take the 4-letter words you memorized and start recombining them.

For example, if you memorized fish and cart, you would spell something like “fictrash.”

Or, if you intermingle them in order, it would be one letter from each word interleaved:


It’s actually REALLY hard to do correctly, and typing presents a different kind of challenge. You can think of it as the mental version of preparing your fishing line.

a hand is holding a fish

This particular brain exercise is kind of like preparing fishing line in your mind.

Kahne suggests you spend 20 minutes daily on intermingling the letters of words.

The only change to this exercise I would suggest is that you quickly do this after memorizing vocabulary from the IAM lists. And I’m not convinced you need to spend quite so much time on the exercise. Probably 5 minutes will do.

Seven: Intermingle Entire Texts

There are many more exercises in the Multiple Mentality Course. I’d be robbing you of the opportunity to discover them for yourself when you read it.

But to skip to the kingpin of them all, imagine memorizing three verbatim texts, say a poem, a speech and a list of 3-digit numbers.

As you recite the memorized speech, you write the poem with your left hand and the digits with your right hand.

writing with left hand

How will you get there? 

Practice with just writing first.

For example, write the first word of the speech, then the first word of the poem, then the first string of digits. Carry on from there, alternating as you go through all three pieces of information, unit by unit. 

Will Multiple Mentality Really Help You? 

Ultimately, I cannot say. 

But practicing these skills has been noticeably beneficial to me because I suffer from brain fog if I don’t get enough mental exercise.

Plus, I have so much chronic pain to deal with, I need the mental strength these activities bring in order to cope. 

And all the more so, given that I myself have to memorize speeches and deliver them well.

Even if some of the ways I use these exercises are not as elaborate as Harry Kahne’s demonstrations, given all the challenges I face, I need all the mental robustness I can get. And these activities deliver.

a man climbing a mountain

Taking on challenges is key to mental growth throughout life.

The real reason I think these exercises work is simple:

  • They promote cognitive switching, which is known to help people establish mental flexibility
  • They improve memory because you are exercising it
  • They expand hand-eye coordination because you are writing in challenging ways
  • They exercise verbal memory because you are reciting information in a novel format

Beyond that, they get you working with information in ways we’re not used to doing. This simple “out of your comfort zone” stretching provides mental dexterity we wouldn’t have otherwise. 

And if you think about it, the other ways of developing such skills of the mind are very similar:

Reading a lot, drawing from your memory frequently, combining ideas in different ways. 

reading a lot

Those things are draining, however.

That’s why using Kahne’s exercises as warmups has helped me do all the things I do, both in memory and running this site. Think about how many years I’ve been juggling the MMM Podcast, Blog, YouTube channel and the courses – talk about multitasking!

All that said, here are my main concerns:

Kahne’s social criticisms are obviously not correct. It’s also strange to me that Kahne doesn’t teach mnemonics. 

But that’s okay. It gives me the opportunity to fill in the gap through a free course I invite you to sign up for now.

Magnetic Memory Method Free Memory Improvement Course

When you add memory techniques to the exercises we’ve talked about today, I’m sure you’ll find all of Kahne’s exercises beneficial.

In fact, I’m not sure I would have been able to use ars combinatoria without having practiced them first. And that skill has been very beneficial to me indeed.

What other mental exercises do you know that exercise multiple mentality? 

2 Responses to " Harry Kahne’s Multiple Mentality Course: An In-Depth Review "

  1. BEEJAXX says:

    Playing the piano or organ and singing simultaneously…
    Is that an example of multiple mentality?

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