Social Style Theory is a model for understanding interpersonal patterns based on individual behavioral tendencies. It was proposed in the late 1950s by American psychologists David W. Merrill and Roger H. Reid [1]. Through analysis of interpersonal relationships and communication effectiveness within organizations, they classified people into four basic styles based on behavioral observation: Driving, Expressive, Amiable, and Analytical.

The theory frames human behavior along two axes: Assertiveness and Responsiveness. People high in assertiveness readily express their opinions and take initiative; people high in responsiveness place priority on emotions and interpersonal relationships. The combination of these two dimensions is said to produce distinct patterns of behavior and interpersonal style [2].

Since the 1960s, the model has been widely applied in industrial psychology, leadership research, and sales training. Merrill & Reid (1981) developed the Social Style Profile (SSP) — an observational scale for measuring social style — and it has been used extensively in business training and management education [3]. Subsequent research by organizations including Wilson Learning and the Tracom Group has confirmed the reliability and validity of the behavioral indicators [4].

In Japan as well, the model has been adopted in organizational psychology and communication education — particularly as a tool for deepening self-understanding and understanding of others [5]. Social Style Theory is not a framework for ranking people, but a practical tool for learning how to engage with people of different types and fostering mutual understanding.

This assessment reconstructs the theory of Merrill and Reid in a form suited to contemporary Japanese society. It measures the two axes of assertiveness and responsiveness, and identifies which of the four styles — Driving, Expressive, Amiable, or Analytical — most closely reflects your own tendencies. The goal is to help you understand your own interpersonal patterns, and to use that understanding as a foundation for building more effective communication in your workplace, family, and personal relationships.

Following the review of the above research, certified psychologists, clinical psychologists, and graduates of psychology master's programs reviewed and refined the question items. Two factors were established, with ten questions assigned to each, resulting in a 20-item scale.

【Assertive Axis】
Measures the degree to which a person expresses their opinions and ideas clearly and directly.

1. When I have an opinion, I speak up on my own initiative.

2. I often take the lead in discussions.

3. I am able to start a conversation with someone I have just met without hesitation.

4. I share my disagreement openly, even when it differs from others' views.

5. I am good at taking action toward a goal.

6. I prefer to make decisions myself rather than relying on others.

7. I tend to state my position clearly in discussions.

8. I often find myself in a leadership role.

9. When those around me are uncertain, I step in to clarify the direction.

10. I make sure to express my view before a conversation ends.

【Emotional Expression Axis】
Measures the degree to which a person expresses their feelings and emotions openly.

11. I tend to show my emotions readily through my expressions and tone of voice.

12. I express joy and excitement openly and naturally.

13. My reactions in conversation tend to be expressive.

14. I make a point of sharing my feelings rather than keeping them to myself.

15. I am able to communicate anger or anxiety in a calm and measured way.

16. I frequently use gestures and body language when I speak.

17. I am sensitive to the emotions of those around me and respond accordingly.

18. I tend to take on a quiet, supportive role rather than a central one.

19. I am able to read others' emotions and adjust my response accordingly.

20. I am comfortable sharing feelings as part of a conversation.

【Response Format】
Each question is answered using the following 5-point scale.

Strongly Disagree　0

Disagree　1

Neutral　2

Agree　3

Strongly Agree　4

【Factor Structure】
This assessment consists of two factors: the Assertive Axis and the Emotional Expression Axis.
Each axis contains 10 questions, for a total of 20 questions, with scores calculated separately for each axis.
The Assertive Axis measures proactiveness in behavior, decisiveness, and strength of self-expression.
The Emotional Expression Axis measures emotional disclosure, expressiveness, and strength of empathy.

【Scoring Method】
Each axis consists of 10 questions, with a total possible score of 0 to 40 per axis.
Scores on each axis are divided into four bands, and the combination of both axes identifies one of 16 types.

Assuming a normal distribution (mean = 20, standard deviation = 6),
the score ranges for each axis are defined so that the population is distributed roughly equally across four bands (approximately 25% each).
This design produces a more natural distribution than a simple 10-point interval approach.

【X Assertive Axis】
A (High)　28 and above (28–40)　Highly proactive and directive. Strong leadership in speech and action.
B (Moderately High)　20–27　Spontaneous and action-oriented. Expresses opinions while maintaining harmony with others.
C (Moderately Low)　12–19　Somewhat reserved, but able to assert when necessary.
D (Low)　0–11　Cooperative and passive. Strong tendency to defer to others.

【Y Emotional Expression Axis】
1 (High)　28 and above (28–40)　Emotionally expressive and sociable. Frequently shows feelings through expression and words.
2 (Moderately High)　20–27　Warm and approachable. Communicates emotions gently and naturally.
3 (Moderately Low)　12–19　Calm and reserved. Tends to keep emotions inward.
4 (Low)　0–11　Rational with a tendency to suppress emotion. Tends toward thoughtful, analytical judgment.

【Driving】
1　Commander　　　　　　　High　　Low
2　Structured Driver　　　　High　　Moderately Low
3　Practical Executor　　　　Moderately High　　Low
4　Strategic Planner　　　　Moderately High　　Moderately Low

【Expressive】
5　Influential Communicator　　　　High　　High
6　Visionary Creator　　　　　　　High　　Moderately High
7　Energizing Catalyst　　　　　　Moderately High　　High
8　Connection Builder　　　　　　Moderately High　　Moderately High

【Amiable】
9　Devoted Supporter　　　　　　Low　　High
10　Atmosphere Harmonizer　　Low　　Moderately High
11　Unity Seeker　　　　　　　　Moderately Low　　High
12　Trust Builder　　　　　　　　Moderately Low　　Moderately High

【Analytical】
13　Thorough Investigator　　　　Low　　Low
14　Quality Verifier　　　　　　　Low　　Moderately Low
15　Logical Thinker　　　　　　　Moderately Low　　Low
16　Objective Analyst　　　　　　Moderately Low　　Moderately Low

For each type, we provided an evaluation of approximately 1,000 characters covering key characteristics and points to be aware of. The content was developed based on prior research and the clinical experience of the authors.

This assessment has not been subjected to factor analysis or checks for reliability and validity. It reflects the professional judgment of specialists, but please note that it lacks sufficient statistical grounding and is not intended for use in academic research.

[1] Merrill, D. W., & Reid, R. H. (1972). Personal Styles and Effective Performance. Chilton Book Company.

[2] Bolton, R., & Bolton, D. G. (1984). Social Style/Management Style: Developing Productive Work Relationships. AMACOM.

[3] Merrill, D. W., & Reid, R. H. (1981). The Social Style Profile. TRACOM Group.

[4] Tracom Group. (2016). The Social Style Model: History and Validation. TRACOM Group White Paper.

[5] Nakano, A. (2015). The Psychology of Communication: Applications of Social Style Theory. Nakanishiya Publishing.