Antecedent-Based Interventions Flashcards

A BCBA is using a noncontingent reinforcement (NCR) schedule to reduce self-injurious behavior maintained by attention. After several weeks, the behavior is near-zero but has not fully extinguished. Which adjustment best reflects evidence-based thinning of the NCR schedule while minimizing resurgence risk?

Answer: Gradually increase the inter-reinforcement interval using a progressive schedule while monitoring for behavioral contrast

Thinning NCR schedules should be done gradually to prevent resurgence — a phenomenon where extinguished behavior re-emerges when reinforcement conditions change. Progressive interval thinning with ongoing monitoring is the evidence-based approach. Abrupt shifts, immediate DRO transfers, or premature removal risk triggering resurgence or extinction bursts.

During a functional analysis, escape-maintained problem behavior is confirmed. The team implements high-probability request sequences (high-p) before low-probability demands. After three sessions, problem behavior during low-p requests has increased. What is the MOST likely explanation?

Answer: The high-p requests inadvertently became a discriminative stimulus (SD) signaling the upcoming aversive low-p demand

When high-p requests reliably precede aversive low-p demands, the high-p sequence can acquire conditioned aversive properties through respondent conditioning — becoming an SD for the upcoming escape opportunity. This is a documented failure mode of behavioral momentum interventions and requires restructuring the sequence or embedding low-p tasks differently.

A practitioner implements environmental enrichment as an antecedent intervention to reduce problem behavior maintained by automatic reinforcement. Which of the following scenarios would MOST likely render the enrichment ineffective, according to motivating operations (MO) theory?

Answer: The enrichment items provide sensory stimulation in the same modality as the problem behavior's automatic reinforcement

Effective environmental enrichment works by providing an alternative source of automatic reinforcement that abolishes the establishing operation (EO) for the problem behavior. If the enrichment stimulates the same sensory modality as the reinforcer maintaining problem behavior, it may actually function as an additional establishing operation (increasing deprivation signals) or fail to compete, rather than abolishing the motivation. Enrichment must engage competing sensory channels or provide functionally similar but safer stimulation.

A behavior analyst is treating elopement in a child with ASD. The team uses visual schedules as an antecedent intervention. Over time, the child begins eloping only when visual schedule pictures are missing or out of order. This pattern is BEST conceptualized as:

Answer: A conditioned motivating operation (CMO-R) where schedule disruption signals reduced reinforcement availability

When an antecedent stimulus (intact schedule) reliably predicts reinforcement access, its absence functions as a Conditioned Motivating Operation — Reflexive (CMO-R), signaling reduced reinforcement availability and increasing the value of escape/elopement. This is distinct from simple S-delta effects because the motivational state (not just the cue for behavior) is altered by the schedule's absence.

A BCBA is designing an antecedent intervention for a student whose off-task behavior is maintained by access to peer attention. The team considers incorporating choice-making opportunities. Which of the following represents the MOST sophisticated application of choice as an antecedent intervention, given the identified function?

Answer: Offering choices that include selecting a peer work partner, thereby incorporating the maintaining reinforcer into the task structure

The most sophisticated antecedent application matches the choice options directly to the function of problem behavior. Since peer attention maintains off-task behavior, embedding peer interaction as a legitimate choice option within the task (choosing a work partner) makes the task itself a source of the maintaining reinforcer — acting as an abolishing operation for the motivational state driving problem behavior. Simply offering task or seat choices does not address the peer-attention function.

When using stimulus control transfer procedures in conjunction with antecedent interventions, a practitioner must be cautious about 'prompt dependency.' Which scenario BEST illustrates prompt dependency arising specifically from an antecedent modification — rather than from a consequence-based error?

Answer: A student only completes tasks when a visual timer is present, even though the timer was introduced solely as an antecedent support and no differential reinforcement was tied to timer-absent trials

Prompt dependency from antecedent modifications occurs when the support itself (the timer, visual cue, environmental modification) becomes a necessary discriminative stimulus for desired behavior — not because of how consequences were arranged, but because the antecedent was never systematically faded. If the timer was only introduced as an antecedent and was never faded, responding only under timer-present conditions reflects pure antecedent stimulus control entrenchment, not a reinforcement error.