Self-Determination Theory: Autonomy, Competence, and Relatedness

Key Takeaways

  • Self-Determination Theory (SDT) posits that human beings have three basic psychological needs: Autonomy, Competence, and Relatedness.
  • When these three needs are met, individuals experience intrinsic motivation, well-being, and sustained behavior change.
  • Autonomy refers to the need to feel in control of one's own behaviors and goals.
  • Competence is the need to feel capable and effective in one's interactions with the environment.
  • Relatedness is the need to feel connected, understood, and a sense of belonging with others.
Last updated: July 2026

Self-Determination Theory: Autonomy, Competence, and Relatedness

Self-Determination Theory (SDT), developed by psychologists Edward Deci and Richard Ryan, is a macro-theory of human motivation and personality. It represents a critical theoretical foundation for health and wellness coaching because it explains not just how people change, but why they change, and what sustains that change over the long term. SDT posits that human beings are inherently proactive and have a natural tendency toward growth, integration, and health. However, this natural tendency requires specific nutriments from the social environment to flourish. These nutriments are the three universal, innate psychological needs: Autonomy, Competence, and Relatedness.

According to SDT, when an environment (such as a coaching relationship) supports these three needs, individuals develop intrinsic motivation—they engage in behaviors because they find them inherently interesting, satisfying, and aligned with their core values. Conversely, when these needs are thwarted by controlling environments, motivation becomes extrinsic (driven by external rewards, punishments, or guilt), which rarely leads to sustainable behavior change.

The Three Basic Psychological Needs

For a coach to foster lasting change, their approach must systematically address and fulfill these three psychological needs.

1. Autonomy

Autonomy is the universal urge to be a causal agent of one's own life and act in harmony with one's integrated self. It is the need to feel that one has a choice, is self-directing, and is the author of their own actions. It is crucial to understand that autonomy does not mean independence or acting without the influence of others; rather, it means acting with a sense of volition and internal endorsement.

When autonomy is supported, clients feel empowered. When it is thwarted (e.g., when a coach or doctor tells them what they must do), they may comply temporarily, but they are likely to experience psychological reactance—rebelling against the control to assert their freedom, often leading to non-compliance or sabotage.

How Coaches Support Autonomy:

  • Avoiding Controlling Language: Minimizing words like "should," "must," "have to," and "need to." Using phrases like "you might consider," "some people find," or "what are your thoughts on..."
  • Providing Meaningful Choices: Offering a menu of options rather than a single prescription. Even small choices (e.g., "Would you prefer to talk about diet or exercise first today?") enhance autonomy.
  • Eliciting Client Perspectives: Consistently asking the client for their ideas, solutions, and rationales before offering expert advice.
  • Acknowledging the Client's Right to Choose: Explicitly stating that the client is in charge of their own decisions, even if they choose not to change.

2. Competence

Competence is the need to feel capable, effective, and mastery over one's environment. It is the desire to seek out challenges that are optimal for one's capacities and to persistently attempt to maintain and enhance those skills. When clients attempt to change a health behavior, they often enter a domain where they feel highly incompetent due to past failures.

If a goal is too difficult, it causes anxiety and frustration, thwarting the need for competence. If a goal is too easy, it causes boredom. SDT suggests that individuals thrive when they are challenged just slightly beyond their current comfort zone, allowing them to experience success and build mastery.

How Coaches Support Competence:

  • Structuring for Success: Helping clients set realistic, incremental, and achievable SMART goals. Breaking down massive goals into small, manageable steps.
  • Providing Positive Feedback: Offering sincere, specific affirmations and acknowledging effort, progress, and resilience, not just final outcomes.
  • Reframing Failure: Helping clients view setbacks not as evidence of incompetence, but as valuable data and learning opportunities in the process of mastery.
  • Skill Building: Assisting the client in identifying and acquiring the specific skills or resources they need to succeed.

3. Relatedness

Relatedness is the universal want to interact, be connected to, and experience caring for others. It involves feeling a sense of belonging, being understood, and knowing that one matters to another person. In the context of health behavior change, relatedness is often the glue that holds the process together when motivation wanes.

In coaching, relatedness is primarily fulfilled through the strength and quality of the coach-client relationship. If a client feels judged, misunderstood, or viewed merely as a "case," their need for relatedness is thwarted, diminishing their motivation to engage in the work.

How Coaches Support Relatedness:

  • Unconditional Positive Regard: Demonstrating genuine warmth, acceptance, and non-judgment, regardless of the client's progress or setbacks.
  • Accurate Empathy: Using active listening and profound reflections to show the client that they are truly heard and understood on a deep level.
  • Authentic Connection: Being present, attuned, and human in the interaction. Showing genuine interest in the client's life beyond their specific health goals.
  • Encouraging Social Support: Helping clients identify and cultivate supportive relationships outside of the coaching environment.

The Motivation Continuum

SDT is perhaps best known for defining a continuum of motivation, ranging from amotivation to intrinsic motivation.

  • Amotivation: A complete lack of intention to act. (e.g., "I don't see the point in exercising.")
  • Extrinsic Motivation (Controlled): Acting due to external pressures, rewards, punishments, or guilt/shame. (e.g., "I am dieting because my spouse says I have to," or "I am exercising because I feel guilty if I don't.") This type of motivation is brittle and rarely lasts.
  • Extrinsic Motivation (Autonomous): The behavior is still technically extrinsic (done for an outcome, not for pure joy), but the client has integrated the value of the behavior into their identity. (e.g., "I exercise because being a healthy role model for my kids is deeply important to me.") This is highly sustainable.
  • Intrinsic Motivation: Engaging in a behavior purely for the inherent satisfaction, joy, or challenge of the activity itself. (e.g., "I run because I love the feeling of the wind on my face and the runner's high.")

The goal of coaching is to support the basic psychological needs so that a client's motivation can move along this continuum, transitioning from controlled external drivers to autonomous, internalized values.

Clinical Scenario

Consider a client, Marcus, who has been mandated by his employer's wellness program to lose weight to lower his insurance premiums. He enters coaching highly defensive and externally motivated (Controlled Extrinsic Motivation).

  • Thwarting SDT: A coach might say, "You need to follow this diet plan so you don't lose your insurance discount." This thwarts autonomy, makes him feel incompetent, and damages relatedness.
  • Supporting SDT: The coach focuses on Relatedness first by empathizing with his frustration about the mandate. The coach supports Autonomy by asking, "Since we have to be here, what is something related to your health that you actually want to work on?" Marcus admits he wants less back pain to play golf. The coach supports Competence by helping Marcus set a very small, achievable stretching goal related to golf. By supporting his basic needs, Marcus's motivation shifts from pleasing his employer to pursuing a goal he values autonomously.

NBHWC Exam Tips

  • The Big Three: Memorize Autonomy, Competence, and Relatedness. You must be able to identify which psychological need a coach is supporting or thwarting in a given scenario.
  • Autonomy vs. Competence: Ensure you can distinguish between interventions that build Autonomy (providing choices, removing pressure) and those that build Competence (setting small goals, acknowledging success).
  • Intrinsic vs. Extrinsic: Understand that intrinsic motivation is ideal, but autonomous extrinsic motivation (aligning a behavior with deeply held values) is a highly realistic and sustainable goal in health coaching.
Test Your Knowledge

According to Self-Determination Theory, which of the following best describes the psychological need for Autonomy?

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B
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D
Test Your Knowledge

A coach helps a client break down a massive goal of losing 50 pounds into a highly manageable goal of walking for 10 minutes, three times a week. Which basic psychological need according to SDT is the coach primarily supporting by structuring for success?

A
B
C
D
Test Your Knowledge

A client tells their coach, 'I am only eating vegetables because my doctor told me I absolutely have to if I want to live longer, but I hate every minute of it.' What type of motivation is this client demonstrating?

A
B
C
D
Test Your Knowledge

Which coaching behavior is most likely to thwart a client's need for Relatedness?

A
B
C
D