To distinguish a skill deficit, performance barrier, and access problem in ABA, define the response and conditions, then verify communication, materials, opportunity, health, sensory, motor, language, technology, partner, and support access. Compare performance with ordinary supports available and unavailable. Avoid teaching or prompting a response the environment blocks, and keep remaining skill needs separate from system failures.

Define the target condition

Specify what Faye wants to do, the response forms, setting, materials, time, assistance, accuracy, and natural outcome. Separate a person-selected participation goal from an expectation created only by staff convenience or a rigid norm.

Verify access first

Check language, AAC, vision, hearing, motor access, sensory conditions, device compatibility, login, materials, transport, privacy, partner behavior, and available time. Mark an opportunity invalid or inaccessible according to predeclared rules rather than scoring failure.

Retain ordinary supports

Assess Faye with the tools, communication, accommodations, prompts, and environmental arrangements she ordinarily uses. Independence can include self-selected technology and support. Removing useful supports may measure deprivation or navigation barriers instead of the desired skill.

Compare supported performance

Use repeated valid opportunities with supports ready, plus carefully selected comparison data. Measure response, latency, help, error, repair, partner response, burden, and client experience. Avoid a one-trial can or cannot conclusion.

Identify the remaining learning need

When performance remains incomplete under accessible conditions, locate the specific step, discrimination, sequence, fluency, communication, or generalization need. Confirm that teaching it serves Faye's priority and does not replace an environmental repair or another professional's role.

Review the combined solution

A plan can preserve access, teach a chosen component, coach partners, and change the environment at the same time. Track each intervention against its own target. Ask Faye whether the result is easier, more useful, and consistent with her preferred level of support.

Protect Faye's communication and health context

For Faye, keep AAC and other effective communication, assent and withdrawal when applicable, privacy, ordinary supports, food, water, bathroom, mobility, prescribed care, rest, and emergency help available. Record health and access conditions before interpreting performance. Suspected medical, mental-health, sensory, or safety issues go to the qualified route; a behavioral hypothesis never replaces needed care.

Build Faye's evidence ladder

Move from the least intrusive evidence that can answer Faye's question toward stronger methods only when the decision, uncertainty, risk, and likely value justify it. Separate client report, proxy report, records, descriptive observation, measurement, structured comparison, and experimental evidence. For each rung, state what it can show, what it cannot show, who may use it, and which evidence would change the conclusion.

Explain the reasoning to Faye

Use Faye's preferred language and communication mode to explain the question, evidence sources, proposed comparisons, privacy, current support, uncertainty, and possible decisions. Invite correction and disagreement. Describe why another method may or may not be needed. Meaningful participation is evidence for clinical fit; agreement is never coerced or treated as a condition for access to appropriate care.

Build Faye's skill-performance-access differential assessment

Create one versioned skill-performance-access differential assessment for the digital scheduling routine. Include the client-priority decision, question, response class, topographies, contexts, sources, health and access review, ordinary supports, opportunities, comparisons, missingness, evidence strength, alternatives, uncertainty, safety, authority, chosen method, result, decision, communication, effective dates, revision, and next review. Preserve original and superseded reasoning.

Work through Faye's example

Faye completes 18 eligible scheduling tasks. Sixteen have the approved accessible interface and ordinary support; she completes 13. In 18 matched unsupported trials from historical records, only seven were completed. Report access readiness as 16/18 and supported performance as 13/16. The contrast suggests a large access component while leaving three supported noncompletions for separate skill and context review. Preserve all planned and valid units, raw counts, denominators, source labels, access states, missing conditions, conflicts, corrections, versions, decisions, and open work. This fictional example demonstrates one clinical-reasoning control. It supplies no universal threshold, diagnosis, functional relation, legal conclusion, treatment effect, or outcome guarantee.

Use Faye's evidence for a bounded decision

Before collecting more data, identify the exact decision and qualified owner. For Faye, document supporting and conflicting evidence, current protection, client priority, alternatives, further evidence, feasibility, risk, decision, implementation test, accessible explanation, disagreement route, and review trigger. Choose the least burdensome adequate method rather than the most elaborate available method.

Review Faye's results without causal shortcuts

For Faye, show raw observations and denominators, representative coverage, direct and proxy sources, access, health context, missingness, comparisons, alternative explanations, and uncertainty. Descriptive timing and co-occurrence support hypotheses. Functional claims require evidence suited to that claim and remain bounded to tested responses and conditions. Treatment change after intervention alone never proves the hypothesized mechanism.

Address Faye's main reasoning risk

Calling Faye unable to schedule based on the unsupported interface would mistake system design for client ability. Calling the access repair a complete skill solution would ignore the three remaining supported opportunities. Review definitions, client meaning, health, access, sampling, source independence, comparison, measurement, causal scope, and authority separately. Precise language cannot rescue a weak or unsafe assessment. A familiar concept label cannot substitute for direct evidence about this person, response, context, and decision.

Choose Faye's next clinical action

Faye's team restores the interface in two missed trials, keeps the ordinary support, and assesses the remaining steps she wants to perform more independently. Record qualified owners, current safeguards, referral or evidence tasks, plan and assessment versions, due dates, validation evidence, client communication, uncertainty, and next review. Preserve the prior question and hypothesis when evidence changes. A revised clinical account adds an auditable version rather than rewriting what the earlier team believed or observed.

Apply current clinical sources to Faye's reasoning

For Faye, the CASP public summary gives high-level context for ABA treatment of autistic people. The current BACB Ethics Code addresses competence, understandable communication, client and stakeholder involvement, consent and assent when applicable, medical needs, assessment, referral, intervention, risk, documentation, and evaluation for covered people. BACB has no separate organizational jurisdiction. The BCBA outline is examination content and supplies no case protocol or practice authority.

Keep functional claims bounded for Faye

For Faye's question, Hanley's functional-assessment review discusses the broader assessment process, while the Hanley, Iwata, and McCord review examines systematic experimental functional analysis. Neither source makes one interview, descriptive co-occurrence, or an out-of-context result universal proof. The ABAI basic-principles page is higher-education content. ASHA supports continuous AAC access. SAMHSA routes danger or medical emergency in the United States to 911 or the nearest emergency room.

Close Faye's clinical-reasoning review

Review the skill-performance-access differential assessment with Faye, the responsible clinician, access and operational owners, and the specialists named in the manifest. Verify that the question remains useful, evidence proportionate, health and communication protected, concepts precise, uncertainty visible, and decisions within authority. Keep this page draft and noindex until every required review is complete.

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