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A tact in ABA is a verbal response controlled by a present nonverbal stimulus, such as saying "dog" when a dog is seen. Tacting is studied through C.6 of the BACB RBT Test Content Outline (3rd ed.) because the response depends on discrimination between relevant and irrelevant stimuli.
How Tacting Fits C.6 Study#
The RBT Test Content Outline (3rd ed.) states C.6 as: "Implement discrimination training." For tacting, that task means the study scenario turns on whether the learner says the label in the presence of the relevant object, picture, action, property, or other nonverbal stimulus.
C.6 tacting scenarios can ask learners to:
- Identify what stimulus controls the label.
- Distinguish a tact from a mand, echoic, intraverbal, or listener response.
- Notice overgeneralized tacting, such as using one label for several different stimuli.
- Separate tact training from prompt control when the learner responds only after extra help.
The broader verbal behavior aba guide places tacting beside mands, echoics, intraverbals, and listener responding. For the full task family, aba terms keeps the glossary pages connected to the exam-study pages instead of treating terms as isolated definitions.
What Controls A Tact#
The table shows the information-gain focus for this page: a tact is classified by what controls the response, not by the word alone.
| Scenario | Tact? | Controlling stimulus | Why |
|---|---|---|---|
| A learner sees a bus and says "bus." | Yes | The visible bus | The word names the present nonverbal stimulus. |
| A learner smells popcorn and says "popcorn." | Yes | The smell of popcorn | A tact can be controlled by a sensory stimulus, not only a picture. |
| A learner sees a person jumping and says "jumping." | Yes | The visible action | Tact actions are labels for actions currently present. |
| A learner says "sad" when shown a picture of a crying face. | Study tact | The picture card | Tact emotions in study materials usually involve observable pictures or cues, not guessing a real person's private experience. |
| A learner says "cookie" because they want a cookie. | No, mand | Current motivation plus a history of access | The response asks for an item rather than naming a present stimulus. |
| A learner says "cookie" right after an adult says "cookie." | No, echoic | Another person's spoken model | The response matches verbal sound, not a nonverbal stimulus. |
| A learner answers "cookie" after hearing "What do you eat with milk?" | No, intraverbal | A verbal question | The response is controlled by other words without the cookie present. |
A tact can be taught with prompts, but the goal in a discrimination example is for the relevant stimulus to control the response. When a study scenario centers on transferring control from a prompt to a picture, sign, object, or other stimulus, review stimulus control transfer aba before answering.
Defining Features#
The numbered features below separate tacting from similar verbal responses.
- A nonverbal stimulus is present: an object, picture, action, sound, texture, smell, property, location, or visible event.
- The response labels or describes that present stimulus.
- The response is not mainly controlled by wanting the item, avoiding something, or gaining access.
- The response is not simply repeating another person's words.
- The response is not an answer to a verbal fill-in or question when the item is absent.
- The teaching plan defines which labels, stimulus examples, prompts, consequences, and data codes the RBT uses.
Because mands and tacts can use the same word, compare the controlling variable rather than the topography. The mand vs tact vs intraverbal comparison is useful when one scenario could look like naming, requesting, or answering.
Worked Tacting Scenario#
This worked scenario shows how one word can shift across verbal operants as the controlling stimulus changes.
| Teaching moment | What happens | Response | Best study label |
|---|---|---|---|
| Picture card present | The learner sees a shoe picture. | "shoe" | Tact, because the picture controls the label. |
| Wanted item present | The learner reaches toward shoes before outside play. | "shoe" | Mand, because access is the relevant consequence. |
| Spoken model present | The adult says "shoe," and the learner repeats it. | "shoe" | Echoic, because the spoken model controls the response. |
| Question only | The adult asks, "What do you wear on your feet?" | "shoe" | Intraverbal, because another verbal stimulus controls the answer. |
| Prompt dependence | The learner says "shoe" only after the adult points to the correct card. | "shoe" | Prompt control may still be present, so the scenario is not yet clean independent tacting. |
This scenario does not claim that real exam items follow a fixed format. The study skill is reading what controls the response before choosing a verbal-operant label.
Sibling Concepts#
The table below separates tacting from nearby ABA terms that share similar response forms.
| Concept | How it differs from a tact | When the sibling concept applies |
|---|---|---|
| Mand | Controlled by motivation for a consequence. | The learner asks for water, help, a break, or access. |
| Echoic | Controlled by a spoken model. | The learner repeats the sound or word another person just said. |
| Intraverbal | Controlled by other verbal behavior. | The learner answers a question or completes a fill-in without the item present. |
| Listener responding | The response is nonverbal behavior following a verbal direction. | The learner touches, gives, points, or moves after hearing an instruction. |
| Discrimination training | The broader C.6 teaching process. | Different stimuli signal different responses or consequences. |
The planned echoic aba companion page is the clearer bridge when the response matches a spoken model. The planned listener responding aba page is the better fit when the learner acts on a direction instead of saying a label.
Common Mistakes#
These mistakes make tacting questions harder than the short definition suggests.
- Calling every label a tact without checking whether the object, action, or property is present.
- Confusing tacting with requesting when the same word can ask for access.
- Treating a prompted label as independent tacting when the prompt still controls the response.
- Using emotion labels as guesses about real people instead of studying the observable cue named in the teaching material.
- Forgetting that actions and properties can be tacted, not just objects.
Practice Questions#
The table separates official scored-exam weights from this page's original practice allocation.
| Measure | Count or tag | Source or purpose |
|---|---|---|
| Official Domain C scored questions | 19 | RBT Test Content Outline (3rd ed.) |
| Official Domain C share | 25% | RBT Test Content Outline (3rd ed.) |
| Total scored exam items | 75 scored questions | RBT Handbook, Examination section |
| This page's practice items | 4 | Original tact ABA drill for this article |
| Task tags used below | 4 C.6 items | Page-level practice, not an official task allocation |
These original questions practise identifying the stimulus controlling a tact without using BACB exam content.
1. During picture naming, Ana sees a photo of a spoon and says "spoon." No one asked for the item, and she is not repeating another person's word. Which verbal response is shown?
A Correct. The present picture controls the label.
B A mand request would be controlled by wanting access to the item or event.
C An echoic copy would repeat another person's spoken model.
D A listener act would be a nonverbal response to a verbal direction.
2. During feelings-picture practice, a learner says "sad" when shown a crying face and says "happy" when shown a smiling face. What is the key stimulus-control feature?
A Echoed sound label would point to echoic responding after a spoken model.
B Correct. The label changes with the visual stimulus that is present.
C Wanted item request would point to a mand controlled by motivation.
D Routine step answer would point to chaining, not tacting.
3. During art, the program target is naming actions. The learner says "cutting" when shown a person using scissors, but says "cutting" for drawing too. Which error should the RBT notice?
A Echo after model would require a spoken model controlling the word.
B Request for item would involve asking for access to something.
C Correct. The same label is being used for more than the relevant action.
D Chain step gap would involve a missing step in an ordered routine.
4. During a community-symbol lesson, a learner sees a restroom icon with no printed word and says "restroom," but does not say it for exit-arrow or office-desk icons. What outcome is strongest?
A Access-cue label would mean the response is controlled by wanting access.
B Model-cue label would mean the learner repeated a spoken word.
C Direction-cue label would mean the word followed a verbal instruction.
D Correct. The nonverbal picture controls the label.
FAQ
What is tacting in ABA?
Tacting in ABA is labeling or describing a present nonverbal stimulus. A learner may tact an object, picture, action, property, sound, smell, location, or observable event.
What is a tact in ABA?
A tact is the verbal response produced during tacting. The response is controlled by something present in the environment rather than by wanting the item or repeating another person's words.
Is tacting the same as labeling?
Tacting is often called labeling, but the technical distinction is the controlling stimulus. A label is a tact when a present nonverbal stimulus controls the response.
Can actions and emotions be tacts?
Actions can be tacts when the learner labels a present action, such as "running" while seeing someone run. Emotion tact examples for study should use observable teaching materials or cues rather than treating guesses about private feelings as facts.
Why is tacting important for RBT study?
Tacting helps candidates practise stimulus-control distinctions inside Behavior Acquisition. A tact study item can ask what controls the label, not whether the word itself looks correct.
Sources
- RBT Test Content Outline (3rd ed.), updated 09/2024, overview, Domain C allocation, and C.6 task statement.
- RBT Handbook, updated 06/2026, Examination section for scored-item language.