Foundational Knowledge Flashcards

A behavior analyst is designing a reinforcement schedule for a client who has achieved mastery on an FR-5 schedule. Which schedule transition would BEST promote resistance to extinction while maintaining high response rates?

Answer: Thinning to a VR-15 schedule gradually over several sessions

Variable ratio (VR) schedules produce the highest rates of responding and the greatest resistance to extinction among intermittent schedules. Gradually thinning from FR-5 to VR-15 maintains the high-rate responding characteristic of ratio schedules while introducing variability that makes extinction more resistant. FI schedules introduce post-reinforcement pauses and scallop patterns inconsistent with maintaining high rates. DRO targets the absence of behavior, not maintenance. VI schedules produce moderate, steady responding but with lower rates than VR.

When applying the matching law to a two-alternative concurrent schedule, a client allocates 70% of responses to Option A and 30% to Option B. If Option A delivers 60 reinforcers per hour, how many reinforcers per hour must Option B be delivering?

Answer: Approximately 26 reinforcers per hour

The strict matching law states that the relative rate of responding equals the relative rate of reinforcement: B₁/(B₁+B₂) = R₁/(R₁+R₂). If 70% of responses go to Option A with 60 reinforcers/hour, then R₁/(R₁+R₂) = 0.70, so 60/(60+R₂) = 0.70. Solving: 60 = 0.70(60+R₂) → 60 = 42 + 0.70R₂ → 18 = 0.70R₂ → R₂ ≈ 25.7, approximately 26 reinforcers per hour.

A discriminative stimulus (SD) differs from a motivating operation (MO) in a critical functional way. Which statement MOST accurately captures this distinction?

Answer: An SD signals the availability of reinforcement contingent on behavior, whereas an MO alters the effectiveness of reinforcement and the frequency of behavior that has produced it

The SD signals that a specific response-reinforcer relationship is currently in effect — it has a discriminative or 'behavior-directing' effect based on historical correlation. The MO (as defined by Michael) has two effects: a value-altering effect (changes the reinforcing or punishing effectiveness of a stimulus) and a behavior-altering effect (changes current frequency of behavior that has previously produced that stimulus). These are mechanistically distinct: SDs evoke behavior based on signaled contingencies; MOs change reinforcer potency and evoke behavior that accesses that reinforcer.

In a complex behavioral chain, a practitioner observes that the organism reliably completes the early links but consistently fails at the penultimate link. According to behavioral chain theory, what is the MOST likely explanation?

Answer: The conditioned reinforcing value of the final link's SD is insufficiently strong to maintain behavior through the penultimate link

In a behavioral chain, each link serves as both an SD for the next response and a conditioned reinforcer for the preceding response. The SD for the final link acquires the strongest conditioned reinforcing value because it is most proximal to the terminal (unconditioned) reinforcer. If the penultimate link fails, it suggests the SD of the final link has not acquired sufficient conditioned reinforcing value to maintain behavior through that step — often because the terminal reinforcer is weak, delayed, or the chain is too long. This is a classic temporal gradient issue in chaining.

A researcher reports that a self-injurious behavior (SIB) is maintained by 'automatic reinforcement.' A behavior analyst reviewing the study should recognize that this functional designation is BEST understood as indicating which of the following?

Answer: The SIB produces sensory consequences that are reinforcing independently of social mediation, but the specific sensory mechanism remains to be identified

Automatic reinforcement (Vaughan & Michael, 1982; Skinner's 'automatic') means the reinforcement is produced by the behavior itself without requiring the mediation of another organism — typically sensory/perceptual consequences. Critically, this is a functional category, not a mechanistic explanation; it rules out social reinforcement but does not specify which sensory modality or physiological mechanism maintains the behavior. Automatic reinforcement does NOT mean the behavior is immune to extinction or operant manipulation — indeed, NCR and sensory extinction (Rincover) are viable approaches. It also has nothing to do with automated devices.

During a functional analysis, a clinician observes that problem behavior occurs at high rates across ALL conditions, including the control (play) condition. Which interpretation is MOST consistent with this pattern, and what is the recommended next step?

Answer: The pattern suggests automatic reinforcement or an undifferentiated result; the analyst should conduct a separate automatic reinforcement analysis or a precursor analysis to differentiate

When problem behavior occurs at high and undifferentiated rates across all FA conditions including the control, the two primary interpretations are: (1) automatic reinforcement — behavior maintained by response-produced stimulation regardless of social contingencies, or (2) an undifferentiated result due to methodological issues (e.g., brief sessions, carry-over effects, poor stimulus control). The recommended next step is to conduct an automatic reinforcement analysis (e.g., alone condition, NCR analysis) or a precursor/antecedent-based analysis to further differentiate. Definitively concluding multiply-controlled behavior from undifferentiated data alone is premature without additional evidence.