Model A | Японская ассоциация соционики

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Section 01

What Is Model A

What is Model A

Model A is a model that describes the placement structure of psychological functions for each Socionics type. It assigns the eight functions operating in the human psyche (Leading, Creative, Role, Vulnerable, Suggestive, Mobilizing, Ignoring, Demonstrative) two at a time into four blocks. Every person possesses the same eight functions; what determines a person's type is which information element occupies which position.

The model answers three core questions: (1) What is "strong" and what is "weak" — the structural placement of strength. (2) What feels "valued" and what feels "unvalued" — the placement of valuation forms the basis of quadras and intertype relations. (3) Where are we fulfilled, and where are we wounded — understanding dual relations and the Vulnerable function rests on this.

"Whether relations with another person are good or difficult is determined not by their goodwill or malice, but by their type of information metabolism."

Aušra Augustinavičiūtė · founder of Socionics

Model A is diagrammed as a 2×4 matrix — four rows (one per block) vertically, and two columns (Inert and Contact functions) horizontally. A key structural principle is that strong functions (4D, 3D) and weak functions (2D, 1D) alternate in placement. The Ego block (1, 2) and Id block (7, 8) hold high-dimension (strong) functions, while the Super-Ego block (3, 4) and Super-Id block (5, 6) hold low-dimension (weak) functions — producing the paradox that "what controls is not necessarily what is strong."

Origin of the name (A = Aušra): The "A" in Model A derives from the initial of its founder, Aušra. Integrating Jung's psychological typology with Kępiński's theory of information metabolism, it is an original model that has functioned as the central theoretical framework of Socionics since its publication in the 1970s.

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Section 02

The Four-Block Architecture

The Four Block Architecture

The four blocks are an extension of Freud's structural model of the psyche (Ego, Super-Ego, Id), borrowing those terms directly and adding Super-Id. Each block's character is determined by the combination of three axes: strong/weak, conscious/unconscious, and valued/unvalued.

Model A Placement Diagram (changes with type selection)

Type:

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Block I — Ego

Ego Block

"I know"

(1) Leading (4D) + (2) Creative (3D)

Strong (4D/3D) Conscious Valued Mental Ring

The most powerful and conscious functional block — the seat of the type's core strengths, spontaneous activity, and identity. It runs autonomously without external prompting. The four-dimensional Leading function, which integrates past, present, and future timeframes with adaptive situational response, sits at the center of this block.

Corresponds to Freud's "Ego." Following the reality principle, it is the executive function that mediates the conflicts of all other blocks. The source of conscious strength in Model A and the block most actively projected outward to society. Many socionists observe that it reaches full formation by age 24–25.

Block II — Super-Ego

Super-Ego Block

"I should"

(3) Role (2D) + (4) Vulnerable (1D)

Weak (2D/1D) Conscious Unvalued Mental Ring

A conscious but weak and unvalued block — the arena of response to social norms and others' expectations. The Role function (3) operates from a sense of duty, while the Vulnerable function (4) is the PoLR (Point of Least Resistance) — the type's weakest spot. Criticism directed at this block cuts deeper than criticism anywhere else; it is sometimes called the "block of social control."

Corresponds to Freud's "Superego" — the pressure of internalized norms, prohibitions, and morality. The Vulnerable function (4) is one-dimensional with the lowest processing capacity. When (4) is not being stimulated and the person feels they are meeting others' expectations, they feel at ease.

Block III — Super-Id

Super-Id Block

"I want"

(5) Suggestive (1D) + (6) Mobilizing (2D)

Weak (1D/2D) Unconscious Valued Vital Ring

Weak yet the most highly valued block — the seat of deep longings activated from the unconscious. The Suggestive function (5) corresponds to the dual partner's Leading function (1); natural fulfillment from that source produces the deepest satisfaction. Sometimes called the "child block," it craves to receive information from others.

Close to Freud's notion of the Id as the "seat of instinctual desire," but Augusta coined the new term "Super-Id." Conscious engagement with (5) is difficult and cannot be controlled by oneself. In dual relations, this block receives natural complementation.

Block IV — Id

Id Block

"I can (but do not need to)"

(7) Ignoring (3D) + (8) Demonstrative (4D)

Strong (3D/4D) Unconscious Unvalued Vital Ring

A strong yet unvalued and unconscious block — the seat of hidden strengths that operate naturally but do not rise into awareness. The Ignoring function (7) avoids conscious use but operates at a high level. The Demonstrative function (8) carries four-dimensional processing depth while functioning quietly in the background. Prolonged conscious use leads to exhaustion.

Only partially corresponds to Freud's "Id" — Freud's Id is instinctual drive, whereas Model A's Id block is the seat of "strong but unacknowledged" functions. (8) is the background function of autonomous strength that "does not need others."

The structural paradox — "what controls is not strong": The controlling blocks (Super-Ego 3/4 and Super-Id 5/6) hold low-dimension (weak) functions, while the executing blocks (Ego 1/2 and Id 7/8) hold high-dimension (strong) functions. This reveals a fundamental paradox of the psyche: the domains of social obligation and personal longing are structurally "weak," which is precisely why they require fulfillment and support from outside.

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Section 03

The Eight Functions in Detail

Each of the eight positions in Model A has its own dimensionality, consciousness, valuation, strength, and personal/social role. The positions have names, but which information element actually fills each position depends on the type.

No.	Function	Block	Dim.	Strength	Cons.	Value	Character & psychological role
①	Leading Leading · Program	Ego	4D	Strong	✓	★★	The most spontaneous and powerful function. It runs autonomously without external prompting and shapes the type's fundamental motives, values, and worldview. A four-dimensional function that integrates Time, Situation, Norm, and Experience parameters. It can predict from past experience and generate genuinely new outcomes.
②	Creative Creative · Implementing	Ego	3D	Strong	✓	★★	The flexible implementational means for realizing the goals of (1). Situation-dependent, highly adaptive, and reaches (1)'s ends through varied methods. Processes the three parameters Experience, Norm, and Situation. Generates situational insight and critique automatically, solving new problems in original ways.
③	Role Role · Regulatory	Super-Ego	2D	Weak	✓	—	The function used to respond to social expectations and norms. Driven by a sense of duty ("I should"). Conscious but weak and effortful — processes only the Norm and Experience parameters. Operates in standardized ways and struggles to adapt flexibly to situational nuance. Often used in a "performative" manner.
④	Vulnerable Vulnerable · PoLR	Super-Ego	1D	Weakest	✓	—	PoLR (Point of Least Resistance). The weakest and most easily wounded function. Processes only the Experience parameter (1D). Cannot accurately assess the effectiveness of its own actions. Criticism in this area cuts deeper than anywhere else, easily provoking defensive avoidance, anger, or shame. A paradox: conscious efforts to strengthen it tend to backfire.
⑤	Suggestive Suggestive · Dual-Seeking	Super-Id	1D	Weak	△	★★★	Weak yet the most highly valued function — "the place where one is most deeply fulfilled." Corresponds to the dual partner's (1) Leading function. Usually unconscious to the person themselves, but with a deep craving to receive information and support from others in this area. Easily over-trusted; one is strongly drawn to people who supply information of this kind.
⑥	Mobilizing Activating · Mobilizing	Super-Id	2D	Weak	△	★★	A source of vitality ignited by external stimulus. Corresponds to the dual partner's (2) Creative function. Rises into awareness more easily than (5) and is often experienced as "what gives me energy." Acts as a reference standard; reacts actively to information about itself but tends to over-rely on one's own evaluation.
⑦	Ignoring Ignoring · Limiting	Id	3D	Strong	△	—	Strong but spontaneously avoided in conscious use — a sense of "I can but do not need to." Information from this function acts as a "limiting signal," restraining the runaway of (1). One tends to underestimate one's own ability here, but can deliver a high-quality response when stimulated from outside.
⑧	Demonstrative Demonstrative · Background	Id	4D	Strong	△	—	Possesses four-dimensional processing capacity but operates quietly beneath conscious awareness. Acts as the "shadow" of the Creative function (2), supporting its activity in the background. A background function that surfaces as "proof" only when called for. Prolonged conscious use leads to exhaustion. "Prevents negative developments without extra words" (Augusta).

The fixed pattern of dimensionality and position:
(1)=4D, (2)=3D, (3)=2D, (4)=1D, (5)=1D, (6)=2D, (7)=3D, (8)=4D
From Ego to Super-Ego the dimensions descend (4→3→2→1); from Super-Id to Id they ascend (1→2→3→4) — a symmetric arrangement. This is a structural law invariant across all types.

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Section 04

Functional Dichotomies

The eight functions of Model A are characterized by several important dichotomies. These belong to the functional positions themselves and do not change from type to type.

Strong / Weak

Based on dimensionality: 3D and 4D functions are strong, 1D and 2D are weak. Strong functions can process diverse information parameters and produce nuanced, situationally adapted responses. Weak functions rely only on Experience and Norm and produce only stereotyped responses.

Valued / Unvalued

Ego (1, 2) and Super-Id (5, 6) are valued; Super-Ego (3, 4) and Id (7, 8) are unvalued. The information elements held in the valued functions are shared as a quadra, which is why types within the same quadra experience a sense of resonance and ease with one another.

Mental / Vital

Functions 1–4 form the Mental Ring (conscious); 5–8 form the Vital Ring (unconscious). Mental functions carry out foreground processing — articulation, deliberate thought, observation. Vital functions play supporting, background roles.

Inert / Contact

Within each block, the Inert functions (1, 4, 6, 7) tend to be evaluative, stable, and resistant to change. The Contact functions (2, 3, 5, 8) are situationally adaptive and respond flexibly to external stimulus. This dichotomy decides the division of labor between the two functions inside each block.

Accepting / Producing

Functions 1, 3, 5, 7 are Accepting (taking in information from outside); 2, 4, 6, 8 are Producing (outputting processed information). The flow of information metabolism functions as a within-block cycle: "Accepting takes in, Producing puts out."

Controlling block / Executing block

Super-Ego (3, 4) and Super-Id (5, 6) are the controlling blocks (weak, low-dimensional functions). Ego (1, 2) and Id (7, 8) are the executing blocks (strong, high-dimensional functions). Paradoxically, what controls is not strong, and what executes is strong — as a baby's cry moves a parent.

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Section 05

Mental Ring / Vital Ring

Mental Ring · Vital Ring

The eight functions divide into two higher-level groups: the Mental Ring and the Vital Ring. This distinction is the key axis for "whether a function comes to the foreground consciously, or operates in the background unconsciously."

Mental Ring (the arena of social activity)

Mental Ring · Functions 1–4

(1) Leading · (2) Creative · (3) Role · (4) Vulnerable

The block group that operates socially (Ego + Super-Ego) — the arena of articulation, conscious thought, observation, and creative activity. It forms the "outward self" visible to others. Some socionists interpret the Mental Ring as corresponding to the developmental stage of learning to live within society — the socialization process in which one comes to know "must" in addition to "wish."

Vital Ring (the arena of personal activity)

Vital Ring · Functions 5–8

(5) Suggestive · (6) Mobilizing · (7) Ignoring · (8) Demonstrative

The block group that functions personally and inwardly (Super-Id + Id) — the arena of unconscious desire, fulfillment, and hidden strengths. The "inner self" that others find hard to see. The Vital Ring corresponds to the childhood stage when one was the center of the universe — pure personal vital activity before friction with society. The Suggestive function (5) is sometimes called the "start button of the model," the key that ignites the whole system.

Dual relations and the asymmetric complement of the rings:
A dual partner is someone whose Vital Ring exactly matches your Mental Ring placement. Specifically:

Your (1) (4D, strong, conscious) = your dual's (5) (1D, weak, craved)
Your (2) (3D, strong) = your dual's (6) (2D, weak, craved)

This asymmetry — one partner's "naturally exercised strength" precisely matches the other's "most-needed input" — is the reason dual relations are psychologically the most fulfilling relationship type.

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Section 06

Type-Specific Function Placement

Select a type to display its eight-function placement in Model A. All 32 types are supported.

Model A Function Placement

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Section 07

Intertype Relations & Model A

The most important application of Model A is the description of intertype relations. From differences in Model A function placement, Augusta derived 15 relationship patterns between the 16 types (31 between the 32 types of Model K).

Relation	Corresponding Model A structure	Psychological experience
Duality	(1) and (5) fully correspond (your (1) = partner's (5), partner's (1) = your (5))	The deepest fulfillment. Each fills the other's longing without effort. The PoLR (4) of each is matched, so they do not wound one another.
Activity	Same quadra, opposite rational/irrational. (1) ↔ (6), (2) ↔ (5)	They energize one another, but prolonged contact can become draining.
Mirror	Same elements in (1), but their positions are swapped (1 ↔ 2)	Shared values, but different implementation. They find one another interesting, yet misunderstandings occasionally arise.
Identity	All eight functions are placed identically	The most mutual understanding, but no novelty. A sense of competition can also appear.
Conflict	(1) ↔ (4) (your strength is the partner's PoLR, and vice versa)	A structural danger of unconsciously striking one another's PoLR. Values also stand in complete opposition.
Super-Ego	(1) corresponds to the partner's (3) (Role). Values are entirely different	One respects the other, but their values diverge deeply. The information elements the partner uses feel unvalued to oneself.

Quadras and valued functions: The four types of the same quadra share their valued functions — the information elements that appear in positions 1, 2, 5, 6. Same quadra = the same four information elements held as values. This is the theoretical basis for the empirical observation that "inside a quadra it is comfortable, while across quadras values diverge sharply."

MK

Section 08

Model K — Extension to 32 Types

Extension to Model K

Building on Model A as its foundation, the Socionics Association of Japan's Model K develops the framework into a contemporary model through four stages of theoretical extension.

Extension I

8 functions → 64 function codes (sign theory + quasi-function theory)

Bukalov's sign theory (+/−) splits each element into two polarities, and Gulenko's quasi-function theory (-p / -c positions) lets position modulate how a function operates. "Ne" is refined into the four codes "+Ne-p", "-Ne-p", "+Ne-c", "-Ne-c" — yielding a system of 64 function codes in total.

Extension II

16 types → 32 types (Q/D split)

Each type is split into Q (Questim — questioning style) and D (Declarim — declaring style), defining 32 types whose conversational style and information output differ even with the same function placement. A direct application of the quasi-function theory (-p / -c).

Extension III

4 blocks → 8 blocks × 32 positions

Each block is divided into four positions — Core / Regulating / Assimilating / Balancing — to build a 32-position system. Each position has its own dimensionality (1D–4D), valuation intensity, psychological state, and relational character, enabling a structural description of how psychological states transform.

Extension IV

256 compatibilities → 496 compatibility computations

496 relational computations between the 32 types — a significant precision increase from the previous 16×16=256. Comfort, activation, and value-alignment scores for each pair are computed numerically, enabling more precise compatibility analysis.

Model AThe Architecture of Eight Functions