Cognitive Personality Theory is a new system focusing on individual differences, positing type not as a set of letters to define who we are, but rather a series of limitations that can, with patience, be overcome.

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Another lives at the edge flirting the natural laws. To them, it’s “just physics and simple math, can’t deny it!”

Personally the ESTPs I know excel at anything they put their minds into, they might be the type I’m most intimidated because of their high competence.

Another is always fascinated of what the matrix offers. They hold a kind of applied spirituality. Not much about their relationship with it, but how the world manifests certain things in many ways. Ending their sentences with “It really is! There’s so much truth about that.”

They come in many shapes. One goes around like they’ve figured all there is to life. They either follow a mantra like “love is always the answer” or something you’d find in /r/im14andthisisdeep.

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Find your CPT type code!

Learn more about Typing Services.
Basic Express Tier I Tier II
E-mail exchange
Most likely type + alternative
Hour video call
Additional 30 min call for Q&A
PDF report
CPT type score


Text-based service for streamlined type estimation.
  • Short E-mail exchange
  • Type descriptions for each
  • Most likely type, and secondary alternative
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Time-efficient service with CPT-approved typologist Rob.
  • E-mail exchange
  • 1 hour video call
  • Most likely type, and secondary alternative
  • In-call and E-mail result
  • Extra 30 min call for Q&A
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Tier I

In-depth service to iron out uncertainties and explain type in detail.
  • E-mail exchange
  • 1 hour video call
  • Most likely type, and secondary alternative
  • PDF report
  • Extra 30 min call for Q&A
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Tier II

Full exploration of type dynamics exhibiting functions in depth.
  • E-mail exchange
  • 2x 1 hour video calls
  • Most likely type, and secondary alternative
  • PDF report
  • Extra 30 min call for Q&A
  • CPT Type Score

Type Coaching

Suited for those who know their CPT type code, I also offer individual coaching & consultations. This is for those interested in applying type to get further on their journey.

Support CPT

With your support, CPT can continue to evolve and expand! Benefits start with invites to monthly CPT Livestream & access to our Discord server.

A most excellent service

Rated 5 out of 5
29th January 2023

Let me start off by saying, Harry is such a warm and friendly person. He seems like a genuinely good human being and it was a pleasure working with him.

I know it was a challenge to type me. I’ve got a lot of trauma in my background. Plus, I am autistic. And lastly, I am a 50 y/o who has been plugging away at self-actualization for 14+ years, and I’m sure that makes the lines a bit more blurry.

He boiled it down to ISTJ and INTJ. This is where the CPT system really shines. It all came down to the cognitive pairing. The product of Si/Fi is a bit different than the product of Ni/Fi. I love this precision in his system, and I think it’s incredibly useful for typing folks that are a little less clear cut like myself.

I feel confident in his conclusion. I highly recommend his typing service!


Response from Cognitive Personality Theory

Thanks Amy, it was really great to talk to you!

– Harry

CPT seems to be the most accurate and nuanced MBTI system there is.

Rated 5 out of 5
10th January 2023

I was struggling to figure out my type until Rob did a typing session with me. A lot of my doubts on my most likely type came from nuances I saw in myself that didn’t align with the common stereotypes of traditional MBTI. With Rob’s help he showed me that the nuances I noticed in myself were textbook traits of my best fit type according to CPT. CPT takes the more traditional approach of identifying individual cognitive functions and goes further, expanding upon the relationships between the lens and codec functions, examining a person holistically.


Response from Cognitive Personality Theory

It was a joy to get to know you, Michael! Your self-analysis made it real easy, and it was just a matter of properly labeling the concepts. As you said, we strive to look at people for the whole human beings they are! Thank you so much for the review, and best of luck on your journey! – Rob

Very through analysis by rob

Rated 5 out of 5
31st December 2022

Very unbiased approach. I liked everything about his report. From short interaction, he can build a profile and internal accurate understanding of you!


Response from Cognitive Personality Theory

My pleasure Lola! All the best to you -Rob

Thanks Rob 🙂

Rated 5 out of 5
17th December 2022

I had been trying to understand what type I could be for two years without ever coming to any real conviction. Thanks to Rob’s analysis, I finally see things more clearly. I think I needed an outside expertise. And the arguments based on the notions of CPT are helping me to understand better how cognitive functions can influence my behavior.


Response from Cognitive Personality Theory

Glad to be of help Sébastien! Best of luck on your journey! – Rob

Tier 1 typing service

Rated 5 out of 5
13th November 2022

Hi my name is Shahow I purchased the type tier 1 service to get clarification on what type I could be because For the longest time I was confused as to what my accurate type was during my 1 hour call with Harry on October 23rd he was really patient, polite and listened to what I had to say. After 10 days I got my analysis on what type I am my result was ISTJ a type that I never considered it was really detailed and accurate I found myself agreeing with it because of how much it made sense to me. Conclusion is the money for this service is worth it.


Response from Cognitive Personality Theory

Thank you Shahow, I appreciate you taking the time to leave a review 🙂

Finally confident in my type!

Rated 5 out of 5
29th October 2022

I was stuck between INFP and ISFP for a long time. Harry really helped me to understand why I’m an ISFP and how I’m actually processing information instead of relying on stereotypes. His typing service was highly in depth and insightful. He doesn’t just provide you a type, he helps you understand where you fall on the spectrum of your type and to what degree you have developed all of your functions.

Furthermore, he’s compassionate and a great listener with equally great questions. I could tell he really cared about helping me get the most out of our sessions and was happy to clarify anything that I was confused about. He’s also fun to talk to! I’m now fully confident in my type and I highly recommend Harry’s services to anyone seeking clarity and self improvement!


Response from Cognitive Personality Theory

Thank you so much, Lauren – it was great talking to you!

Low Stress and Logical Typing

Rated 5 out of 5
17th October 2022

ISFP here who has been confused for years. Having all my motivations laid out and described by Harry was well worth the price. I’d absolutely recommend his typing service.

Tom B

Response from Cognitive Personality Theory

Thank you, Tom!

Wonderful experience!

Rated 5 out of 5
16th October 2022

This was a fantastic experience! I do not enjoy talking about myself and am generally pretty private about my most personal thoughts, so I was very nervous about doing this, Still, I was quite confused about my personality type and eager to learn more. Harry was very welcoming and easy to talk to and asked fantastic questions. I’m not very good at articulating a thought in the moment and was concerned that I was giving him a garbled mess of half-finished thoughts to work with but through some sorcery, he produced an insightful detailed report that gave me a better understanding of myself and my cognitive processes. I did commit to myself ahead of time to being fully transparent and open throughout the process, which I do think is important. I’ve been able to use some of the things I’ve learned already to make some small steps to realize goals that I hadn’t fully formed before. It’s a fantastic tool for self-discovery and growth and I can’t recommend it enough. I hesitated in doing this for quite a while and am so glad I did.

Mary Jo

Response from Cognitive Personality Theory

Thanks Mary Jo, I really appreciate the kind words!

Worth it

Rated 5 out of 5
29th August 2022

Very satisfied with my CPT typing experience. I had long been between types, and after much deliberating, finally booked the Tier II service. Worth every penny.

I found Harry easy to talk to despite my usual hesitance about calls. He was polite and professional, never hurried, and knew how to lead the conversation. I was surprised by how much ground was covered over just one call, let alone two, and impressed by how accurate Harry’s report was given that short amount of time. He is truly knowledgeable, and at every step of the process I felt I was in capable hands.

I also appreciate the fluidity of the Cognitive Personality Theory model—I think it accounts for a lot of the variance you see even between people of the same type, while remaining true to their cognition. As most others have said, it dispels stereotypes common to the traditional system…but what I most like is that it encourages typing by functions as pairs rather than looking at them in isolation.

I highly recommend Harry’s typing service and would suggest it to anyone seeking clarity, especially if the confusion stems from feeling between types. Most people realistically won’t fit into any one box, and this is where I think CPT really excels—its holistic approach explains common differences while leaving room for individual variation and further growth. The alternative type I was suggested was something I’d never considered, and superficially seemed very different from the first-choice type, but after reading further I realized how similar they really were. Lastly, Harry’s questions are so specific that one would struggle to answer according to a certain type—a huge boon in alleviating my doubts about subconscious bias.

In all, my experience with this service was very positive; I’m glad I finally decided to seek an expert opinion. Harry is eminently skilled in picking out underlying cognition while accounting for growth and change over time. Definitely worth the money, and I would readily recommend this service to anyone on the fence.


Response from Cognitive Personality Theory

Thank you so much for this review, Dami, it is truly appreciated. It was a pleasure to get to know you and I’m so glad the CPT approach gave you the clarification you were looking for.

As you say, the system is all about growth and fluid variation between individuals, so it means a lot to read your testimonial!

Thanks Harry , it was nice to have your trustworthy assessment.

Rated 5 out of 5
9th August 2022

It has been for a while and I’m writing this. And after knowing the result which was a little bit unexpected and different from what I was believing who I was within the theory, I don’t mean I always rely on judging myself via typology, though, now I feel like I have been knowing how to use what I am good at healthily, which is why I originally intended to have the service.

Best of all, I could see the effort he made for understanding my self-observation even though it’s written in English as my second language.

And It was the upstanding service which was with an objective and appropriate sense based on his profound theory that purely transferred from my self-observation.

(So I consider people have to watch it out as his application form says.)


Response from Cognitive Personality Theory

Thank you Yuko, I truly appreciate the kind words!