Download Episode Hereright click link and select “Save Link As…”

In this episode, Joel and Antonia chat with Personality Hacker’s Advanced Profiling Coach Melissa Harris about the theory vs reality of personality type dynamics.

In this podcast you’ll find:

  • Guest host Melissa Harris, our Advanced Profiling coach joins.
  • There can be a difference between what type theory teaches us about our relationship with the functions in our stack (based on their position in our car), versus how this plays out in real life.
    • Training and reality don’t always match – an illustration
  • Check out our article on The Car Model to find out how the function stack works
  • A deep dive into the 4 positions in the car – what does the theory say and what is our real relationship with each function?
  • The Driver (Dominant) function:
    • Why it’s not the loudest or most obvious function a person is using
    • Understanding the subtle confident energy of the Driver function
    • How fluency and transferable skills relate to the Driver
  • The Copilot (Auxiliary) function:
    • Why the Copilot isn’t necessarily just behind the Driver in terms of skill development
    • Our push-pull relationship with the Copilot and our need for permission to use it
    • The Copilot as an access point for growth
  • The 10 Year Old (Tertiary) function:
    • Why does our 10 Year Old try to “prove its value”?
    • Our love-hate relationship with the various areas of our 10 Year Old function
    • How do you spot the limitations of the 10 Year Old function, especially when there’s evidence of high skill development present?
  • The 3 Year Old (Inferior) function:
    • What are some of the stereotypes about how people view and use their 3 Year Old function – and are they accurate?
    • How spikes of aspiration and skill development can show up here
    • Our relationship to the philosophy of our inferior function
    • Using the relationship between our Driver and 3 Year Old function to overcome “one-sidedness”
  • How do people view their lower functions within themselves – and how can this alter their perception of its position in their stack?
  • How our functions develop through the seasons of our lives.
  • Looking at how the functions are woven into people’s stories during profiling sessions.

To subscribe to the podcast, please use the links below:

Subscribe with iTunes
Non-iTunes Link
Google Play
Radio Public
Listen Notes

If you like the podcast and want to help us out in return, please leave an honest rating and review on iTunes by clicking here. It will help the show and its ranking in iTunes immensely! We would be eternally grateful!

Want to learn more?

Discover Your Personal Genius


We want to hear from you. Leave your comments below…


  • Keith Daniels
    • Keith Daniels
    • June 22, 2021 at 7:42 pm

    Spg gave pretty solid response as to what Si is. But I’d say a few general traits that Si doms have as well include

    A natural talent for knowing what is safe and secure in life

    A tendency to play it safe, even when you take a risk you like to know that’ll probably work out.

    A tendency to remember details well especially about people. (I’m an ISFJ too and I have this trait)

    Being very in tune with your physical experience

    Tendency towards making decisions based on what ‘s been proven to work, natural skepticism towards new ideas.

    Aspiring to be more adventurous and spontaneous, but struggling with this part and sometimes seeing this desire within you.

    -KJ (ISFJ)

  • KJ
    • KJ
    • June 21, 2021 at 7:38 pm

    Yeah this podcast it’s really on point especially about the dominant and tertiary functions. In my type (ISFJ), I do find that my (Ti) process or Accuracy I feel like I need to justify my conculsions there more. For example, I’m really into Astrology and I enjoy learning about it and showing other people I understand it thoroughly. Or the need to make sure my logical arguments are pretty internally logically consistent. I try to also be aware of my own logical biases and try to remedy them as much as possible. I think it can be hard for types to find the balance with the tertiary function. Like you guys said using the tertiary function in many different contexts, can be difficult for the type.

    In a real life example, with me and my INTP friends. I may outclass my INTP friends in understanding a system like astrology or personality theory because I’m spending more time studying it than they are. But they usually outclass me in using Ti across many different contexts. Like when there is problem, they know how to problem solve it effectively and in reasonable amount of time. Whereas I can tend to dismiss the problem and let it fester and build up. They are also better at spotting them and removing the bad lines of thinking better. Whereas I can attach more to the lines of thinking and not spot the personal biases I have.

    On the flip side of that, my hero function (Si), I do this so automatically and it’s a big part of who I am that I don’t need to show this off. Besides, Si is known as boring function in MBTI Circles ? jokes aside I don’t need to show this off. I’m pretty much a natural at paying attention to small details, tuning into my physical body and create stability/security in my life. Whereas with my INTP friends and INFP sisters, I’ve seen a pattern where they like to brag about how good they are with paying attention to details and taking a slow and safe approach to life. It’s funny that as an Si driver, they seem to at times pick out or see risks when the risks aren’t that big.

    But yeah great podcast and I got a lot of out of it! Especially the parts about the driver and 10 year old function.

  • Justine G
    • Justine G
    • June 20, 2021 at 11:58 am

    Yes, thanks for responding.

  • Antonia Dodge
    • Antonia Dodge
    • June 6, 2021 at 3:10 pm

    Hey, Justine -

    I just re-listened to the podcast to review the original intent of the statements you’re referencing. I suspect the approximate time stamp of the statements in question is 9:10 – 11:45. (If I’m inaccurate, please provide the time stamp.)

    The distinction between what I said and how it may be have been interpreted is that I’m speaking of the feeling we have about our dominant. The theme of the dominant function is “quiet confidence” because of how we experience this part of ourselves. Life circumstances, career choice, environmental factors… these will all influence how much development we’ve done with our dominant and how flexible we are with it, which varies greatly. But what doesn’t often change is our feelings about our dominant. We may not have developed all aspects, but we still have the confidence that comes with watching ourselves behave with dexterity throughout our lives. That’s why we also said that opportunities to refine the dominant are ‘exciting’.

    I hope that helps.


  • William (ISFJ)
    • William (ISFJ)
    • June 5, 2021 at 12:34 am

    Wow, thank you so much for your reply! About 90% of all the characteristics/examples that you gave just clicked. Like they mentioned in the podcast (and what you reiterated in your last paragraph), is that the majority of these dominant function characteristics all just seemed like how life works to me. Along with one insight I’ve had this week (that my mind is very often replaying and re-post-processing past experiences), your information was just what I needed to get on the road of understanding how my dominant Si works.

    Thanks again,

Leave a comment

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.