Si(T.) — "Observation" [SLI Base]
External Sensation. A subject's controlled intake of external data, selectively focusing one's receptive sensory faculties and attention on functional details.
Model-L · Kimani White
The Sixteenfold Cross
Four natures. Sixteen types. One socion.
Kimani White and Aleesha Lowry's extension of Model A. Where Model A assigns eight information elements to eight functional positions, Model L divides each element into two sub-variants — producing sixteen distinct monadic elements and a richer account of how each type actually processes information.
Model-L is the original framework of Kimani White and Aleesha Lowry. This presentation is independent and unofficial. It is offered for educational purposes only. Any errors in interpretation are the author's own and do not reflect on the framework or its creators.
Origins
Beyond Eight Elements
Model A gives socionics its foundational structure: eight information elements assigned to eight functional positions. For most analytical purposes this is sufficient. But Kimani White and Aleesha Lowry observed something Model A leaves implicit: every block pairs a rational element with an irrational one, and the character of each element is shaped by the axis it is paired with. A Perceiving element carries the influence of a Judging quality — T. for the objective, detached influence of Logic; F. for the subjective, involved influence of Ethics. A Judging element carries the influence of a Perceiving quality — N. for the abstract, intuitive influence; S. for the concrete, sensing influence. The element's informational territory doesn't change. What changes is the character it takes on from its structural partner.
The solution was precise: subdivide each of the eight Model A elements into two sub-variants, one for each cross-influence. This produces sixteen monadic elements — the same eight elements of information, each now described with twice the resolution. The sub-variant notation makes the cross-influence explicit: Ne(T.) is Ne shaped by a logical, objective quality; Ne(F.) is Ne shaped by an ethical, subjective one. Ti(N.) is Ti shaped by an intuitive, abstract quality; Ti(S.) is Ti shaped by a sensing, concrete one. The full cross-influence argument, with worked examples, is on the Bridge page.
Model L does not replace Model A. It extends it. Every Model A type stack remains valid; Model L adds a second layer of resolution, specifying not just which element occupies each position but which sub-variant of that element — and therefore exactly how that position actually operates for that type.
The 16 Elements
Each Element, Two Modes
The sixteen monadic elements are the raw material of Model-L. Each derives from one of the eight Model A elements, distinguished by its sub-variant. The names below are Kimani White's own published descriptions. The type shown in brackets is the type for which this element serves as the Base — its most natural, archetypal expression.
Sensation
Si(F.) — "Stimulation" [SEI Base]
Involved Sensation. One's subjective experience of incoming bodily stimuli and physical vitality. Such experiences are usually charged with the subjective valences of somatic feelings.
Drive
Se(T.) — "Actuation" [SLE Base]
External Drive. The regulatory leveraging of force to control and shape one's physical environment, bringing it into conformity with the bounds of circumscribed parameters.
Se(F.) — "Impetus" [SEE Base]
Involved Drive. The generation of viscerally felt, mobilising somatic impulses which convert one's vital reserves into vigorous exertion towards specific, concrete aims.
Insight
Ni(T.) — "Apprehension" [ILI Base]
Detached Insight. Nonverbal understanding of concepts and awareness of temporal trends. Insight into events in terms of their strategic implications and how they are likely to play out over time.
Ni(F.) — "Reverie" [IEI Base]
Internal Insight. Fantasising scenarios and aspirational daydreaming. One's inner reflection on the flow of events in terms of narrative significance and subtext.
Imagination
Ne(T.) — "Ideation" [ILE Base]
Detached Imagination. The active generation and creative manipulation of concepts, as well as other uses of one's imaginative capacities to brainstorm and explore semantic possibilities.
Ne(F.) — "Inspiration" [IEE Base]
Internal Imagination. One's inner sense of potentiality and spontaneous impulses for creative expression. Drawing upon previous experience to imagine novel ways of doing things, activities to explore, and other opportunities for personal growth.
NOTE for display: Ne(F.) describes a mode of engagement — personally vivid, involved, charged with significance — not a fixed subject matter. It can attach to any domain: science, music, craft, nature, mathematics, or people. The F. sub-variant specifies how the engagement feels, not what it is directed at.
Structure
Ti(S.) — "Habitus" [LSI Base]
External Structure. Embodied physical structures and codified behavioural habits. The tangible, defining forms of individual subjects, groups, objects and other organised systems.
Ti(N.) — "Intellect" [LII Base]
Detached Structure. The linguistic formatting and interpretative schema of one's mind. Used to frame and articulate concepts into coherent, communicable ideas.
Application
Te(N.) — "Reason" [LIE Base]
Detached Application. Informal logic and articulation of fact propositions. Uses of available data to figure out productive end goals and formulate workable strategies.
Te(S.) — "Praxis" [LSE Base]
External Application. Informal methodologies and practical experimentation. The flexible use of hands-on techniques and material resources to improve the workflow of one's physical environment.
Character
Fi(N.) — "Soul" [EII Base]
Internal Character. Inner values and ideals. The totality of one's foundational convictions, moral inclinations and abstract notions of what is inherently worthwhile in life.
Fi(S.) — "Animus" [ESI Base]
Involved Character. Volitive preferences and relational bonds. The totality of a subject's stable, visceral attitudes of affinity and aversion towards particular individuals and concrete objects of experience.
Emotion
Fe(S.) — "Affect" [ESE Base]
Involved Emotion. Physiological moods and expression. The physical conveyance of somatic feelings that mediate sensory experiences through aesthetic signals, creating atmospheric vibes.
Fe(N.) — "Sentiment" [EIE Base]
Internal Emotion. Inner opinions and passions. Deeply felt emanations of emotion which are conveyed through dramatic rhetoric and symbolic gestures, often inciting others to feel and act accordingly.
Capacity Groups
Four Capacities, Sixteen Positions
Model-L organises the sixteen monadic element positions into four capacity groups — A, B, C, and D — each containing four positions. The capacity groups describe the psychological relationship a type has with those positions: how naturally they operate, how much conscious effort they require, and how the type experiences them.
A CAPACITY — Preeminent
The A capacity contains the type's most natural and automatic positions. The Base (A1) is the leading element — the type's primary mode of engagement with the world, operated with effortless confidence. The Creative (A2) is the tool the Base deploys. The Ignoring (A7) and Demonstrative (A8) round out the capacity, operating competently in the background.
The A capacity elements share the same club as each other: they are drawn from either the Rational (Judging) club or the Irrational (Perceiving) club, depending on the type.
B CAPACITY — Supported
The B capacity shares the same Rational or Irrational club as the A capacity. Where A operates automatically, B operates with conscious support — the type can perform these positions reliably but with more deliberate attention.
C CAPACITY — Contrasting
The C capacity shares the opposite club to A — if A is Rational, C is Irrational, and vice versa. The C positions are the type's domain of greatest contrast: the Suggestive position (what the type most needs from others) lives here, alongside the Role (what the type performs consciously in social situations) and two others.
D CAPACITY — Vulnerable
The D capacity contains the type's Vulnerable position — the point of greatest sensitivity, where criticism lands hardest. It also contains the Mobilising position, which is energising and welcome when it appears in others. The D capacity is not weakness — it is the shadow side of the A capacity's strength, and the engine of interpersonal complementarity.
A critical precision: B shares the Rational (J) club with A when A is Rational, and the Irrational (P) club with A when A is Irrational. C always takes the opposite club to A. This means the A and B capacities always draw from the same club, while C and — in a different way — D provide the contrasting element domains. This rule was confirmed by Kimani White directly and is essential for correctly reading any Model-L cross.
The Cross
Sixteen Positions, One Type
The Model-L cross is the visual representation of all sixteen monadic element positions for a given type, arranged in a plus-sign layout of four quadrants. Each quadrant corresponds to one capacity group (A, B, C, D), colour-coded as shown. Within each quadrant, four positions are displayed with their element notation, position name, and sub-variant.
- A quadrant (top-right, dark teal) — the Preeminent capacity
- B quadrant (top-left, deep blue) — the Supported capacity
- C quadrant (bottom-left, light mint) — the Contrasting capacity
- D quadrant (bottom-right, medium teal) — the Vulnerable capacity
The interactive Model-L reference tool allows you to explore the full cross for all sixteen types, with dichotomy filtering, position comparison, and a built-in quiz.
Open the Model-L Reference AppReading the Model
What Each Position Tells You
A Model-L type profile is read position by position within each capacity group, starting from A1 (the Base) and working through the cross. Each position has a specific psychological role, inherited from Model A but now specified to the level of the monadic element sub-variant.
The Base (A1) is the single most important position. It defines the fundamental mode by which the type processes reality. Everything else in the profile operates in relation to it. When reading a type description, start here.
The Creative (A2) is the Base's instrument. It operates in service of A1's goals and is often more visible in behaviour than the Base itself — more flexible, more externally deployed, more conversational. Types sometimes misidentify their Creative as their Base.
The Vulnerable (D4) is the position of greatest sensitivity. It is not incompetent — types can perform here — but it is the position most susceptible to criticism and most easily overwhelmed by excessive demand. Understanding a type's Vulnerable is essential for understanding their stress responses and interpersonal needs.
The Suggestive (C5) is what the type most wants and most responds to positively when it appears in others. It cannot easily produce this mode itself and experiences it as a gift. The Suggestive is the engine of dual attraction — each type's Suggestive is precisely served by their dual's Base.
The Mobilising (D6) is energising and uplifting when present in others. Like the Suggestive, it is welcomed rather than self-generated. Together the Suggestive and Mobilising define what the type needs from its social environment to function at its best.
The Ignoring (B7) and Demonstrative (A8) are background competencies. The type can perform these positions reliably but finds them unrewarding to focus on directly. They operate automatically and quietly, often without the type fully recognising their own ability here.
The Relationship
Extension, Not Replacement
Model-L is built on Model A's foundations and cannot be read without them. The function stack, block structure, quadra membership, club, and temperament of any type are all Model A concepts that Model-L inherits unchanged. What Model-L adds is sub-variant resolution — the T./F. and S./N. distinctions that specify exactly which mode of each element a type leads with in each position.
A type described in Model A terms is not incomplete; it is described at a different level of resolution. Model A tells you that LII leads with Ti and supports it with Ne. Model-L tells you that LII's Ti is specifically Ti(N.) — Intellect, the detached linguistic schema of the mind — and that their Ne is Ne(T.) — Ideation, the architecturally directed generation of conceptual structure. The extra resolution matters when distinguishing LII from LSI, or ILE from IEE, in cases where leading element alone does not settle the question.
For a full comparison of how the two frameworks approach each type, see the Bridge section.
The BridgeAttribution
Credits and Sources
Model-L was developed by Kimani White and Aleesha Lowry, beginning in late 2018 through collaboration on the WSS diagnostic team.
Primary sources:
— Kimani White, Socionics: Model-L (presentation document)
— Kimani White, "The 16 Elements of Socionics (Model L)", Simple Socionics, July 2025
— "Introducing Model L with Kimani White", YouTube interview with Jack Aaron, September 2025
This site presents Model-L for educational purposes only. It is not affiliated with Kimani White, Aleesha Lowry, or the World Socionics Society. All interpretation is the author's own. Errors belong to the site.
Full credit to Kimani White for the Model-L framework.