Descriptive assessment
A descriptive assessment directly observes a problem behavior and the events around it in the natural setting, without changing anything, to find patterns.
In descriptive assessment, the observer records behavior as it happens during the person's usual routines, along with the antecedents and consequences that surround it. Common methods are ABC recording (narrative or checklist), scatterplots that show when behavior occurs across the day, and recording that measures how often specific events follow the behavior. Nothing is arranged or changed for the assessment.
Descriptive data help identify patterns, such as problem behavior occurring mostly during transitions or when a sibling takes a toy, and they help the supervisor form hypotheses about function. They also show real-world events that may not be included in a functional analysis.
Because nothing is manipulated, descriptive assessment can only show correlations. A consequence may often follow a behavior without maintaining it; for example, adults may react with attention to most problem behavior, even when the behavior is maintained by escape. For that reason, descriptive data are combined with other information, and sometimes a functional analysis, before the supervisor draws conclusions. RBTs collect descriptive data objectively, describing what was seen and heard rather than guessing at reasons.
Example and non-example
| Example | During a week of classroom observation, an RBT records each instance of a student's desk-kicking along with what happened just before and after it on an ABC data sheet. |
|---|---|
| Non-example | Asking the teacher to fill out a rating scale about when the kicking happens is an indirect assessment, because it relies on report rather than direct observation. |
Don't confuse it with
| Functional analysis | Descriptive assessment observes without manipulating variables; functional analysis manipulates them to test functions. |
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| Indirect assessment | Descriptive assessment involves direct observation of the behavior; indirect assessment relies on interviews, questionnaires and rating scales. |
Test yourself
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Question 1Which list names the three general types of functional assessment methods?
Show answer
A: Indirect assessment, descriptive assessment and functional analysis. Functional assessment includes indirect methods (interviews, rating scales), descriptive methods (direct observation in the natural setting, such as ABC data) and functional analysis (testing conditions directly).
- B: These are other kinds of assessments, not functional assessment methods.
- C: These are continuous measurement procedures.
- D: These are phases of intervention, not assessment methods.
Task B.3 · 40-hour curriculum section D
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Question 2An RBT observes a student during normal classroom routines and records what happens immediately before and after each instance of yelling, without changing anything in the classroom. Which type of functional assessment is this?
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B: Descriptive assessment. Directly observing behavior in the natural setting and recording antecedents and consequences without changing them is descriptive assessment.
- A: Indirect assessment uses interviews or rating scales, not direct observation.
- C: A functional analysis deliberately arranges antecedents and consequences.
- D: A reinforcer assessment tests whether items increase behavior when delivered contingently.
Task B.3 · 40-hour curriculum section D
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Question 3Why is a functional analysis considered stronger evidence of function than ABC observation?
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A: It changes conditions directly, so it can show cause, not just correlation. ABC observation shows which events tend to occur with the behavior. A functional analysis changes the conditions on purpose and measures the behavior, so it can demonstrate a functional relation.
- B: A functional analysis measures behavior directly; it does not rely on caregiver reports.
- C: Functional analyses are usually conducted in controlled settings with planned conditions.
- D: A functional analysis depends on careful measurement of the behavior in each condition.
Task B.3 · 40-hour curriculum section D
Answer every question to see your score.
On the RBT exam
This term belongs to task B.3 Functional assessment in content area B, Behavior Assessment, which is 8 of the 75 scored questions.