Five Brain Types Complementary Fit Audit
Map behavioral tendencies, then add people who cover vulnerabilities
- Difficulty
- Moderate
- Time to result
- ~weeks to results
- Steps
- 5
- Confidence
- 91%
Amen describes five primary types: balanced, spontaneous, persistent, sensitive, and cautious. He associates each with possible strengths and vulnerabilities, then turns the typology into a practical leadership rule: know your strengths, know your vulnerabilities, and hire to cover the vulnerabilities. A spontaneous leader may bring creativity and appetite for novelty while struggling with organization and follow-through; Amen advises against pairing that leader with an equally spontaneous assistant when reliable administration is the need. The model can prompt better role questions, but the episode does not validate the five types as a hiring instrument or establish biological causes for the behaviors. Actual competence, preferences, performance, and fair assessment must outrank a speculative label.
Origin
Amen presents the five primary brain types from his books and applies them to relationships and complementary hiring during The Diary of a CEO.
Core principles
- 01A strength can carry a predictable vulnerability
- 02Self-awareness should influence role design
- 03Similarity is not the same as complementarity
- 04Teams benefit when vulnerabilities are deliberately covered
- 05A type is a hypothesis, not a fixed identity or diagnosis
How to run it
- 1
Identify the tendency
Use repeated behavior to form a tentative view of whether balanced, spontaneous, persistent, sensitive, or cautious tendencies are most visible. Treat the label as a prompt for inquiry.
Pro tip Ask for examples across more than one setting.
Watch out Do not infer a brain state or diagnosis from personality descriptions.
- 2
Map strengths
List what the tendency helps the person do well, such as generating ideas, sustaining routines, sensing others' needs, or anticipating risks. Connect each strength to actual work.
Pro tip Use performance evidence rather than self-description alone.
Watch out No type guarantees a strength.
- 3
Map vulnerabilities
Identify recurring costs such as distraction, rigidity, low mood, or excessive worry. Define the tasks or decisions those costs can undermine.
Pro tip Phrase vulnerabilities as support needs, not character defects.
Watch out Clinical symptoms require qualified assessment.
- 4
Design the complement
Specify the working style and capabilities needed to cover the exposed work. Seek complementarity without assuming opposites automatically cooperate.
Pro tip Write the role outcomes before choosing a person.
Watch out Complementary styles can still conflict without clear responsibilities.
- 5
Test the pairing
Evaluate candidates through relevant work and review whether the partnership improves follow-through, judgment, and stress. Revise the hypothesis when behavior contradicts the type.
Pro tip Use a bounded work sample and explicit success criteria.
Watch out Do not make employment decisions from this typology alone.
In the wild
The host describes himself as risk-prone and inclined to pursue several things at once. He says calmer, more organized, risk-aware managing directors have worked well in his businesses because they cover his lack of focus rather than reproducing it.
→ The leadership pair combines idea generation with stronger organization and risk control.
Common mistakes
Hiring a label
A type cannot replace evidence of competence, integrity, and performance.
Choosing only similar people
Amen warns that spontaneous leaders may reproduce stress and chaos by hiring people like themselves for support roles.
Assuming opposites always fit
The episode also describes spontaneous and persistent partners fighting, so complementarity still needs role clarity and communication.
Is it for you?
Best for
It is best for reflecting on role fit and complementary working styles alongside evidence of skill and performance.
Not ideal for
It is not a validated hiring test, clinical diagnosis, or basis for stereotyping, excluding, or medicating people.
From the transcript
“There's five primary types, balanced, spontaneous, persistent, sensitive, and cautious.”
“know your strengths, know your vulnerabilities, and hire to cover your vulnerabilities”
From the episode
Doctor & Therapist To The Worlds Superstars: Justin Bieber, Miley Cyrus & Bella Hadid!: Dr Amen