Behavior Assessment

Technicians may gather information, prepare materials, present assessment trials, record responses, and assist with procedures after training. They do not independently diagnose, determine behavioral function, select assessment conditions, or make clinical recommendations. The supervisor is responsible for assessment design and interpretation. Before beginning, review the purpose, response definitions, materials, trial sequence, prompting rules, stopping criteria, data codes, and safety procedures. Standardization matters: changing instructions, rearranging conditions inconsistently, or giving extra prompts can invalidate results.

A preference assessment identifies items or activities selected more often than alternatives. A reinforcer is defined by its effect: when delivered after a response, it increases or maintains future responding. A highly selected item may fail to function as a reinforcer in a particular teaching arrangement, and an item’s value can change with recent access, deprivation, illness, or context. Preference should therefore be reassessed as the plan directs. The technician records selections and engagement without assuming that a favorite item will always work or that refusal means the person has no preferences.

In a single-stimulus assessment, one item is presented at a time and the observer records approach, rejection, or engagement. This can be useful for people who have difficulty selecting from arrays, though it may identify many items as preferred without ranking them clearly. In a paired-stimulus assessment, two items are presented together on each trial. Across planned pairings, the person’s selections are used to create a relative hierarchy. Position should be balanced, access duration should be consistent, and the technician should not influence choices through gaze, tone, or placement.

A multiple-stimulus-without-replacement assessment presents an array, removes the selected item, rearranges the remaining options, and repeats the trial. A with-replacement version returns the selected item to the array, which changes the information produced. In a free-operant assessment, several activities are available continuously and the observer measures engagement or allocation of time. Because the person can move among options, the format may resemble natural choice more closely. Follow the protocol for access, blocking, item interaction, and timing.

Indirect methods gather information through interviews, questionnaires, rating scales, and record review. They can identify patterns and guide direct observation but depend on memory and interpretation. Descriptive assessment records behavior as it occurs in natural contexts. ABC recording captures antecedents, observable behavior, and immediate consequences. Scatterplots summarize occurrence across periods or activities. These data may suggest hypotheses, but correlation does not prove function. The technician should report patterns neutrally rather than state that a function is confirmed.

A functional analysis systematically arranges test and control conditions to evaluate the effect of potential reinforcers. Because conditions may evoke challenging behavior, implementation requires qualified design, training, safety planning, and close supervision. The technician’s responsibilities may include setting up materials, delivering the programmed antecedents and consequences, collecting data, and reporting deviations. Do not add conditions, alter consequences, or continue when stopping criteria require termination. A control condition provides a comparison; it does not guarantee that behavior will be absent.

Skill assessments measure current performance across defined responses. Some are standardized; others are program-specific probes. The technician should use the specified instruction, materials, wait time, prompts, and scoring rule. If a response is close but does not meet the criterion, score it according to the rule and add an objective note if allowed. Teaching during a probe can change what is being measured unless the procedure specifically includes instruction. Separate independent, prompted, incorrect, and no-response codes accurately.

Document deviations immediately: extra prompts, missed trials, item-position errors, unavailable materials, interruptions, illness, or safety events. Do not relabel prompted responses as independent or selectively repeat only poor trials. The supervisor decides whether affected data are usable. Assessment results should be communicated through authorized channels and interpreted by qualified personnel. The technician can describe what occurred—such as “the learner selected puzzles on 6 of 8 opportunities”—without converting that observation into a diagnosis or treatment recommendation.