Assertiveness: Being True to Yourself in Conversations

"Assertiveness is not what you do, it's who you are.": Shakti Gawain

Probably, you've already noticed that assertiveness is not about force or dominance. It's something more subtle: authenticity. It's about knowing yourself, expressing your needs with clarity, and respecting others in the process.

Assertiveness isn't aggression. It's the balance between too much and too little: a way to voice your perspective, set healthy boundaries, and still maintain trust in relationships.

Everyone finds this balance differently. There's no perfect formula: just practice, trial, and finding what feels both true to you and respectful of others.

Assertiveness in practice

Before diving into the models, take a moment with three questions we often use to open coaching sessions:

• How do you practice assertiveness in your professional situations?
• How do you usually handle negotiation and collaboration?
• How do you give constructive feedback when the context is tough?

If your honest answers include words like "I avoid", "I soften" or "I explode afterwards", you're in good company, and the frameworks below will help.

The Assertiveness Grid

A simple way to think about communication styles:

The challenge: staying in the assertive quadrant, clear and respectful, to both yourself and others. Passivity protects the relationship at your expense; aggression protects your point at the relationship's expense. Assertiveness refuses that trade-off.

One situation, six models

A framework only becomes useful when you can hear it. So instead of six abstract acronyms, let's run one real situation through all six models.

The situation: Maya, a talented senior consultant on your team, presented the quarterly review to a key client on Thursday. Under time pressure, she showed revenue figures that finance hadn't validated yet. On Friday, the client emailed you, confused by the discrepancy. Maya is engaged, this isn't a pattern, and it still needs to be addressed.

Here's how each model shapes that conversation.

1. DESC

• D = Describe the behavior you observed
• E = Express how it made you feel
• S = Specify what you'd like instead
• C = Consequence: explain what happens if things change or stay the same

In practice: "In Thursday's quarterly review, the deck included revenue figures finance hadn't validated (Describe). When the client flagged the gap, I felt uneasy, because our credibility rests on our numbers (Express). Going forward, I'd like anything unvalidated to be labeled as provisional, or left out (Specify). If we hold that line, the client keeps trusting our data, and you keep the room you've earned on this account (Consequence)."

⚠️ Watch out: "consequence" should be about impact, not a threat.

2. SBI

• S = Situation where it happened
• B = Behavior you directly saw/heard
• I = Impact it had on you, the team, or the outcome

In practice: "In Thursday's client review (Situation), you presented revenue figures that hadn't been validated by finance (Behavior). The client emailed me confused about the numbers, and I'm concerned about the trust we've built with them (Impact)."

⚠️ Watch out: keep it factual, avoid "you always/never." SBI is the backbone of most feedback cultures, we unpack how to deliver it well in The Art of Feedback.

3. ECHO

• E = Effect of the behavior
• C = Cause: explore what might have triggered it
• H = Help: offer your support
• O = Outcome: define the desired change/result

In practice: "The client came away unsure which of our numbers to trust (Effect). Walk me through what happened: did the validated version arrive too late? (Cause) What would help next time: a hard cut-off for final data, or a quick review together before high-stakes decks? (Help) The outcome I want is simple: every number we show is one we can defend (Outcome)."

⚠️ Watch out: don't rush into "Help" before exploring the cause.

4. CANDID

• C = Context of the situation
• A = Action that took place
• N = Need that wasn't met
• D = Desire for improvement
• I = Impact the action had
• D = Do differently: what to try next time

In practice: "Thursday's review was high-stakes for this account (Context). The deck went out with figures finance hadn't signed off (Action). I need us to be unimpeachable on data (Need), and I'd like us to protect that bar even under time pressure (Desire). The client questioned our numbers, which cost us some credibility (Impact). Next time, let's flag anything provisional as provisional, even if the slide looks less polished (Do differently)."

⚠️ Watch out: this can feel heavy if you overuse detail. Keep it human.

5. BOOST

• B = Behavior you noticed
• O = Outcome that followed
• O = Opportunity for improvement or growth
• S = Specifics on what to change or keep
• T = Thanks to acknowledge the effort

In practice: "You handled a tough Q&A with real composure, and the strategic story landed (Behavior, Outcome). The opportunity now is to make the data as solid as the narrative (Opportunity): concretely, only validated figures on client slides, with a cut-off we agree on (Specifics). And thank you for taking this presentation on with a brutal timeline (Thanks)."

⚠️ Watch out: skipping "Thanks" drains motivation.

6. STAR

• S = Situation you're talking about
• T = Task that needed to be done
• A = Action that was taken
• R = Result that came out of it

In practice: "Thursday's quarterly review (Situation): we had to present results before finance had closed the books (Task). You chose to show draft figures rather than postpone (Action). The client spotted the gap and questioned our data (Result)." From that shared, factual account, the conversation about what to do differently opens naturally.

⚠️ Watch out: keep it short and clear, it's not a full story.

Notice what stays constant across all six: facts before judgments, impact before demands, and a door left open for the other person's version.

Beyond the models

• Nonviolent Communication (NVC): puts empathy and needs at the center.
• Thomas-Kilmann (TKI): helps you see how assertiveness and cooperation balance in conflict.
• The Assertiveness Grid: a compass to notice when you slip into passivity or aggression.

Which model should you choose?

In our coaching sessions, we observe that the model matters less than its fit with the moment:

• SBI for quick, everyday feedback: light and factual.
• DESC when a boundary needs to be set and held.
• ECHO or CANDID when you want dialogue more than delivery.
• BOOST to reinforce what's working without sounding hollow.
• STAR to debrief an event factually before judging it.

Two more filters help. Before speaking, run your message through the Socratic Three: is it true, constructive, necessary? And if you expect real tension, prepare the exchange with our full guide to navigating difficult conversations.

The truth?

Assertiveness isn't really something you add: it's more about showing up as yourself: anchored, confident, and respectful. With practice, it becomes less about the model you use and more about the presence you bring.

And presence, like any skill, grows with repetition. The fastest way to make one of these models yours is to say it out loud before the real conversation, with the actual words you'll use, and someone who pushes back. Practice it with Lumia, your AI coach: describe your real situation, pick a model, and rehearse until the words feel like you.