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HUMAN OS WIKI · 03 · UNDERSTANDING EACH OTHER

GIVING FEEDBACK: SBI & DESC

Without a structure, feedback drifts into venting, cyclical argument, and mutual defensiveness. Two formal scripts — SBI for clean observation, DESC for boundary-setting — keep it objective, specific, and centered on what to do next.

7 min read Last updated June 2026 Source: Difficult Conversations, Ch. 6
Circle any word that describes who the person IS — lazy, careless, aggressive — rather than what they DID. Replace every character word with a behavioral description. This single edit transforms judgment into data. — Difficult Conversations, Ch. 6 (the Character Test)
SHORT ANSWER

SBI and DESC are two structured feedback scripts. SBI (Situation-Behavior-Impact) anchors feedback in a specific moment, describes the exact observable behavior without assigning motive, and states the concrete impact — eliminating the vague "you always / you never" that triggers defensiveness. DESC (Describe-Express-Specify-Consequences) goes further for boundary-setting: it adds your emotional experience and an explicit future request. The shared rule is the "character test": replace every word describing who the person is (lazy, careless, rude) with a description of what they did. That single edit turns judgment into data.

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The problem

You've been sitting on a piece of feedback for two weeks. Every version in your head either comes out so softened it says nothing ("maybe just keep an eye on the timeline?") or so blunt it lands like an attack ("you're disorganized"). So you keep not saying it, and the thing keeps happening.

The trap is real: without a structure, feedback drifts into venting, cyclical arguing, and mutual defensiveness. And the fastest way to trigger that defensiveness is to describe the person instead of the behavior. "You're careless" is a verdict on their character. The amygdala reads it as a threat to identity, and now you're talking to a hijacked brain.

Two scripts fix this. One for clean observation, one for changing a behavior. Both keep you describing actions, not assigning character.

The mechanism

The whole reason to use a script is to stay objective, future-focused, and centered on what to do next instead of who's at fault.

SBI — Situation, Behavior, Impact. Best for clean observation.

Situation: anchor it in a specific moment. "During yesterday's cross-departmental alignment meeting…" — this kills the vague "you always / you never" that instantly triggers defensiveness. Behavior: describe the exact, observable action with no motive attached. "I noticed you interrupted the project manager several times before she finished." Impact: state the tangible consequence. "As a result, the meeting ran over and several people left unclear on their deliverables."

DESC — Describe, Express, Specify, Consequences. Superior when you need to set a boundary or require change, because it spells out the future expectation.

Describe: "The last two quarterly reports were missing the required analytics section." Express: "I feel concerned when that data is missing, because it stops us forecasting the budget accurately." Specify: "Going forward, I need the analytics addendum completed and reviewed by the data team before submission." Consequences: "That will streamline our forecasting and get your work noticed by leadership."

And the rule that governs both — the Character Test: review your script and circle any word describing who the person is rather than what they did. Replace every one with a behavioral description. "Lazy" becomes "submitted three assignments after the deadline." That single edit is what turns a judgment the brain defends against into data the person can act on.

The operating system

Five steps to a piece of feedback that lands.

STEP 01

Pick the script for the job

If you mainly need the person to understand what happened and why it mattered, use SBI. If you need a behavior to change going forward, use DESC — it adds the request that SBI leaves out. Choosing wrong is why some feedback is clear but changes nothing.

Observation → SBI. Boundary or change → DESC. When in doubt, DESC, because it includes everything SBI has plus the ask.
STEP 02

Anchor the situation

Name the specific when and where. A concrete moment ("in Thursday's standup") is impossible to argue with; a generalization ("you're always late to things") invites a defense and a counterexample. Specificity is what keeps the conversation out of the ditch.

If you can't name a specific instance, you're not ready to give the feedback yet — you have an impression, not an observation.
STEP 03

Describe behavior, not motive

State only what a camera would have captured. "You interrupted three times," not "you don't respect her." The moment you assign a motive or a trait, you've made a claim about their character that they will — correctly — feel they have to fight.

If your sentence contains "because you're the kind of person who…", delete everything after "because." That's the judgment.
STEP 04

State the impact (and, for DESC, the ask)

Connect the behavior to its real consequence — that's what makes it matter rather than read as nitpicking. If you're using DESC, add how it affects you and exactly what you need next, then name the upside of the change so it's an invitation, not just a complaint.

A specific future request ("reviewed by the data team before submission") is far more useful than a vague one ("be more thorough").
STEP 05

Run the Character Test, then say it aloud

Before delivering, circle every character word and swap it for a behavior. Then read the whole thing out loud. If it still contains a verdict on who they are, revise until it's pure actions and consequences. Said aloud, you'll hear the difference immediately.

Reading it aloud also lets you catch the tone. The same words land differently warm versus clipped.

The printable: the two scripts

Print it. Draft the feedback you've been avoiding, then run the Character Test.

SBI & DESC · FEEDBACK
Describe what they did, never who they are.

SBI — FOR OBSERVATION
Situation (when/where) · Behavior (observable only) · Impact (the consequence).
Kills "you always / you never."
DESC — FOR CHANGE
Describe · Express (how it affects you) · Specify (the ask) · Consequences (the upside).
Use when you need a boundary or a behavior change.
THE CHARACTER TEST
Circle every word for who they ARE. Replace with what they DID.
"Lazy" → "submitted three assignments late."
BEFORE YOU DELIVER
Read it aloud. Any verdict left? Revise to pure action + consequence.
Judgment triggers defensiveness. Data invites change.

THE HUMAN FREQUENCY · FIND COMMON GROUND

Go deeper

This page is the surface. Each layer below goes further.

Common questions

What is the SBI feedback model?
SBI stands for Situation, Behavior, Impact. You anchor the feedback in a specific context ('In yesterday's alignment meeting...'), describe the exact observable behavior without assigning motive ('you interrupted the project manager several times'), and state the tangible impact ('the meeting ran over and several people left confused'). It keeps feedback objective and free of vague generalizations.
What is the DESC script?
DESC stands for Describe, Express, Specify, Consequences. It's superior to SBI for boundary-setting because it explicitly states future expectations: describe the behavior, express how it affects you, specify exactly what you need going forward, and state the positive consequence of the change. Use it when you need behavior to change, not just to be named.
When should I use SBI vs DESC?
Use SBI when the goal is clean observation and shared understanding of what happened and why it mattered. Use DESC when you need to set a boundary or require a behavioral change — it adds your emotional experience and a specific request that SBI leaves out.
What is the character test in feedback?
After drafting your feedback, circle every word that describes who the person IS — lazy, careless, aggressive, rude — rather than what they DID. Replace each one with a behavioral description. This single edit transforms a character judgment (which triggers defensiveness and an amygdala hijack) into observable data the person can actually act on.

Continue the wiki

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SOURCES & CITATIONS

All claims on this page are cited in the difficult-conversations work, Chapter 6: The SBI and DESC Models for Feedback. The frameworks:

  • SBI (Situation-Behavior-Impact) — developed by the Center for Creative Leadership as a structure for specific, observable, non-judgmental feedback.
  • DESC (Describe-Express-Specify-Consequences) — an assertiveness script for boundary-setting and behavioral-change requests.

For the full framework set, see The Human Frequency store.

Where we get our research: We cite peer-reviewed work from PubMed (pubmed.ncbi.nlm.nih.gov), ScienceDirect (sciencedirect.com), and indexed journals via their publishers (Cell Press, Lancet, JAMA Network, JBI). For framework owners we link directly to their published work — the Gottman Institute, polyvagal theory (Porges), and Harvard's Program on Negotiation are the most common. See our editorial policy for the full sourcing standard.