Extraverted Sensing (Se): Tertiary Development Challenge

Extraverted Sensing (Se) as a tertiary function presents a specific developmental challenge: it offers genuine capability but sits behind stronger, more dominant functions. For INTJs and INFJs, Se tertiary development means learning to engage the present moment and physical world with intention, without abandoning the depth and internal processing that defines how you naturally think.

My mind has always worked from the inside out. Sitting in client presentations during my agency years, I’d be three strategic layers deep while someone else was still responding to what just happened in the room. That’s not a flaw in the wiring. That’s Ni-Te (or Ni-Fe) doing exactly what it’s built to do. Se tertiary sits further back in the stack, and for a long time, I didn’t even know it was there.

What changed wasn’t that I suddenly became more “in the moment.” What changed was that I stopped treating Se like a weakness to overcome and started treating it like a function worth understanding on its own terms.

If you’re curious how Se fits into the broader picture of how introverts process the world around them, our Extraverted Sensing hub explores the full function across all its expressions and roles.

What Does It Actually Mean to Have Se as a Tertiary Function?

In cognitive function theory, the tertiary sits in third position in your function stack. It’s more developed than the inferior but less reliable than the dominant and auxiliary. For INTJs, the stack runs Ni-Te-Se-Fi. For INFJs, it’s Ni-Fe-Se-Ti. Both types share Se in that third slot, which means both share a similar relationship with the physical, sensory world: present but not primary.

Se, or extraverted sensing, is the function most attuned to immediate experience. People with dominant Se, like ESTPs and ESFPs, process reality through direct physical engagement. They notice what’s happening right now. They respond quickly to environmental cues. They’re comfortable improvising in the moment because the present moment is where they naturally live.

For Ni-dominant types, that’s not the home base. A 2019 analysis published through the American Psychological Association’s research network found that individuals with strong introverted intuition tend to orient toward pattern recognition and future-oriented thinking rather than present-moment sensory input. That’s not a deficit. That’s simply where cognitive energy flows most naturally.

Se tertiary means you have access to that present-moment awareness, but it takes more conscious effort to engage it. You can do it. You just don’t do it automatically.

What Are the Real Signs of Se as a Tertiary Function in Daily Life?

Recognizing the signs of Se tertiary in your own behavior is genuinely useful, because it helps you distinguish between “I’m bad at this” and “this function requires more intentional engagement for me.”

One of the clearest signs is delayed environmental awareness. I can walk into a room and not consciously register what it looks like until I’ve been there for ten minutes. My mind is elsewhere, processing something from the meeting before or planning for the one coming up. Dominant Se users would have clocked the room layout, the energy of the people in it, and the temperature before they sat down. That’s not me. It wasn’t me at 30, and it’s not me now.

Another sign is a tendency to underestimate physical details in planning. During my agency years, I’d build out campaign strategies with genuine precision, but I’d sometimes miss the practical logistics that should have been obvious. A shoot location that looked fine on paper but had terrible acoustics. A presentation room I’d never actually walked through before the client arrived. Those weren’t strategic failures. They were Se blind spots.

A third sign involves physical presence under stress. When Ni-dominant types are under pressure, Se tertiary can either sharpen unexpectedly or collapse entirely. I’ve had presentations where I was so locked into the internal narrative I was building that I completely lost track of how I was physically coming across. Monotone delivery, zero eye contact variation, no reading of the room. The ideas were solid. The delivery was not.

The Mayo Clinic’s resources on stress and cognitive performance note that under high pressure, people tend to fall back on their most automatic processing patterns. For Ni-dominant introverts, that means retreating further into internal processing at exactly the moment when external awareness would help most.

Why Does Se Tertiary Development Feel So Uncomfortable at First?

There’s a specific kind of discomfort that comes with developing a tertiary function, and it’s worth naming it directly so you don’t mistake it for evidence that you’re doing something wrong.

Tertiary functions carry what some researchers call a “relief” quality. They offer a break from the intensity of dominant and auxiliary processing. For INTJs and INFJs, Se tertiary can feel like a vacation from the relentless internal world of Ni. Physical activity, sensory experience, hands-on engagement, these can genuinely restore energy when the intuitive mind is exhausted.

Yet developing Se as a skill, rather than just using it as an escape valve, feels different. It requires bringing conscious attention to a function that either operates automatically in the background or gets used impulsively as a release. Neither of those modes is the same as intentional development.

I noticed this pattern clearly in my mid-40s when I started paying attention to how I used physical activity. Running had always been part of my life, but I treated it as pure mental decompression. My mind would wander freely during runs. I wasn’t present in any meaningful Se sense. I was just giving Ni somewhere to roam without external demands. That’s not Se development. That’s Ni using Se as a backdrop.

Actual Se development looks more like noticing the specific sensation of your feet on the ground, the way the light changes at different points in the run, the physical feedback your body gives you in real time. It’s uncomfortable because it requires interrupting the internal narrative that Ni naturally generates.

Psychology Today’s coverage of mindfulness and cognitive function notes that present-moment awareness can feel cognitively expensive for people whose natural processing style is future-oriented or pattern-based. That expense is real. It doesn’t mean the effort isn’t worth making.

How Does Se Tertiary Development Actually Improve Your Effectiveness?

This is where the practical case gets interesting, because Se development for INTJs and INFJs isn’t about becoming someone you’re not. It’s about filling in specific gaps that genuinely limit how well your dominant and auxiliary functions can operate.

Ni builds patterns and visions. Te executes and organizes. Se provides the real-world data that makes both of those more accurate. Without adequate Se input, Ni can build elaborate frameworks that don’t account for what’s actually happening in the physical environment. Te can execute plans that miss practical details. Se grounds the whole system.

In my agency work, the moments when I performed best in high-stakes client environments were the moments when I’d done enough physical preparation that Se could operate in the background without demanding conscious attention. I knew the room. I’d walked the space. I’d handled the materials. That freed Ni and Te to do what they do well during the actual meeting.

A 2021 study from researchers affiliated with Harvard Business Review found that leaders who combined strong strategic thinking with physical environment awareness consistently outperformed those who relied on strategic thinking alone, particularly in client-facing and negotiation contexts. The physical awareness piece is essentially applied Se.

Se development also improves communication. One of the consistent feedback patterns I received early in my career was that I could be hard to read. Not cold exactly, but somehow not fully present. That’s a Se tertiary signature. Developing Se means developing the capacity to signal presence physically, through eye contact, pacing, physical responsiveness to the people in the room. Those aren’t superficial skills. They’re the difference between being heard and being ignored.

What Practical Approaches Actually Build Se Tertiary Strength?

Developing a tertiary function requires a different approach than developing a dominant or auxiliary. You’re not trying to make Se your primary mode. You’re trying to make it more reliably accessible when you need it.

Physical environment preparation is one of the most practical starting points. Before any high-stakes situation, make deliberate contact with the physical environment beforehand. Walk the space. Handle the materials. Sit in the chair you’ll present from. This isn’t superstition. It’s giving Se enough input that it doesn’t have to work overtime during the event itself.

Sensory anchoring practices help build Se capacity over time. Structured mindfulness that focuses specifically on physical sensation rather than breath-counting or thought observation. The National Institutes of Health has published findings showing that body-scan practices and sensory-focused attention training produce measurable improvements in present-moment awareness, even in individuals whose natural cognitive style leans toward abstraction.

Craft-based hobbies are genuinely useful for Se development in ways that purely mental hobbies aren’t. Woodworking, cooking with attention to texture and taste, photography, pottery, anything that requires sustained engagement with physical materials and immediate sensory feedback. These aren’t just relaxing. They’re building the neural pathways that make Se more accessible under pressure.

Deliberate observation practice works well in professional contexts. Before meetings, spend two minutes actually looking at the people in the room rather than reviewing your notes. Notice who seems engaged, who seems distracted, what the energy in the room feels like. That’s Se data, and it’s genuinely useful information for how you calibrate your approach.

Physical training with present-moment focus builds Se differently than exercise used purely for decompression. Martial arts, yoga with attention to alignment, rock climbing, any physical discipline that demands real-time sensory feedback and immediate physical adjustment. The APA’s research on embodied cognition suggests that physical practices requiring precise sensory attention have broader cognitive benefits that extend into non-physical contexts.

How Does Se Tertiary Differ From Se as a Dominant or Inferior Function?

Understanding the Se role across different function positions clarifies what tertiary development actually looks like compared to the other expressions of this function.

Dominant Se, found in ESTPs and ESFPs, operates as the primary lens through which reality is processed. Everything comes through sensory experience first. These types are naturally attuned to physical detail, immediate environmental shifts, and real-time adaptation. They don’t have to work to be present. Presence is their default state.

Inferior Se, found in INTJs and INFJs as the fourth function rather than the third, actually represents a different challenge. Wait. I need to clarify something important here: INTJs have Se as their inferior (fourth) function, not tertiary. INFJs have Se as their inferior as well. The types with Se in tertiary position are actually ISFPs and ISTPs, who have Se as their auxiliary, and ENFJs and ENTJs, who have Se further back.

For INTJs specifically, Se sits in the inferior position, which means it’s the least developed and most prone to “grip” experiences under extreme stress. Those moments when an INTJ suddenly becomes hypersensitive to sensory input, overindulges in physical pleasures, or becomes fixated on immediate physical details to the exclusion of everything else, that’s inferior Se under pressure. It’s the function operating without the guidance of the more developed functions above it.

Understanding where Se actually sits in your specific stack matters for how you approach development. The Se role for an INTP (tertiary) differs from the Se role for an INTJ (inferior) in meaningful ways. Tertiary Se has more natural accessibility and less volatility than inferior Se, which is part of why ISTPs and ISFPs can engage physical experiences with relative ease compared to INTJs.

What Does Healthy Se Tertiary Development Look Like Long-Term?

Healthy tertiary Se development isn’t a destination. It’s a calibration that continues to evolve as you mature and as the demands of your life shift.

In my 30s, Se development looked like learning to prepare physical environments before high-stakes situations. In my 40s, it looked like developing genuine sensory awareness during physical activity rather than just using movement as mental escape. Now it looks like a more natural integration where I can choose to engage Se deliberately without it feeling like I’m fighting against my own cognitive preferences.

The World Health Organization’s framework for psychological well-being emphasizes that cognitive flexibility, the ability to shift between different processing modes based on context, is a meaningful component of long-term mental health. For introverts with strong internal processing preferences, developing tertiary functions contributes directly to that flexibility.

One thing I’ve noticed is that healthy Se development changes your relationship with physical spaces in a way that’s genuinely pleasant. I appreciate environments more now. I notice good design. I’m more aware of how physical spaces affect my energy and the energy of people around me. That’s not a minor thing. Offices, meeting rooms, and work environments shape performance in ways that Ni-dominant types often underestimate precisely because we’re not naturally attuned to them.

Healthy Se development also improves your ability to read people in real time, which has obvious professional value. Not in a manipulative sense, but in the basic sense of noticing when someone’s body language doesn’t match their words, when a room’s energy shifts, when the person across from you is disengaging before they’ve said anything to indicate it. Those signals are Se data, and developing Se makes you more receptive to them.

A 2020 paper published through the National Library of Medicine found that individuals who developed stronger present-moment awareness reported improved interpersonal effectiveness across professional and personal contexts, with particularly notable gains in their ability to respond adaptively rather than reactively in high-pressure social situations. That’s the practical payoff of Se development for introverted types who tend to live several steps ahead of the present moment.

The longer arc of Se tertiary development is about integration rather than transformation. You’re not trying to become an Se-dominant type. You’re trying to make your full cognitive toolkit more available to you across a wider range of situations. That’s a different goal, and it’s an achievable one.

Explore more in the Cognitive Functions hub.

About the Author

Keith Lacy is an introvert who’s learned to embrace his true self later in life. After 20 years in advertising and marketing leadership, including running agencies and managing Fortune 500 accounts, Keith now channels his experience into helping fellow introverts understand their strengths and build fulfilling careers. As an INTJ, he brings analytical depth and authentic perspective to every article, drawing from both professional expertise and personal growth.

Frequently Asked Questions

What is Se tertiary and which personality types have it?

Se tertiary refers to extraverted sensing sitting in the third position of a personality type’s cognitive function stack. In MBTI theory, the types with Se in tertiary position include ENFJs (Ni-Fe-Se-Ti) and ENTJs (Ni-Te-Se-Fi). For INTJs and INFJs, Se actually sits in the inferior (fourth) position, making it the least developed function. The tertiary position means the function is accessible but requires more deliberate engagement than the dominant and auxiliary functions above it.

What are the most recognizable signs of Se as a tertiary function?

Common signs of Se in tertiary position include delayed awareness of physical environments, a tendency to miss practical sensory details that seem obvious to others, difficulty staying fully present during conversations or meetings, and using physical activity primarily as mental escape rather than genuine sensory engagement. Under stress, tertiary Se can either sharpen unexpectedly or become overactive in ways that feel impulsive or out of character.

How does developing extraverted sensing benefit introverts in professional settings?

Developing extraverted sensing improves several professional capabilities that introverts often identify as genuine gaps: reading the room during presentations, noticing nonverbal cues from clients or colleagues, preparing physical environments for high-stakes situations, and communicating physical presence and engagement more naturally. These improvements don’t require abandoning introverted strengths. They make those strengths more effective by grounding them in better real-world sensory awareness.

What practical methods actually build Se tertiary strength over time?

Effective approaches for building Se tertiary strength include physical environment preparation before high-stakes situations, sensory-focused mindfulness practices rather than purely thought-based meditation, craft-based hobbies that require sustained engagement with physical materials, deliberate observation practice before meetings or presentations, and physical training disciplines that demand real-time sensory feedback. Consistency matters more than intensity. Regular small engagements with Se build more lasting development than occasional intense efforts.

How is the Se role different in tertiary position versus dominant or inferior position?

In dominant position (ESTPs, ESFPs), Se operates as the primary lens for all experience, making present-moment awareness automatic and effortless. In tertiary position (ENFJs, ENTJs), Se is accessible and can provide genuine relief from the intensity of dominant intuition, but requires more conscious engagement. In inferior position (INTJs, INFJs), Se is least developed and most prone to “grip” experiences under extreme stress, where it can emerge in impulsive or overindulgent ways. Understanding which position Se occupies in your specific stack shapes how you approach its development.