Concepts and Principles
Motivating operations versus discriminative stimuli
Motivating operations alter reinforcer value and momentary response frequency; discriminative stimuli signal reinforcement availability.
How this shows up in scenario questions
- 1Identify value-altering variables in a scenario.
- 2Distinguish an MO from an SD when both antecedents are present.
- 3Explain why deprivation, satiation, effort, or pain changes behavior.
Common misconceptions
- Calling every antecedent an SD.
- Confusing reinforcer availability with reinforcer value.
- Treating MOs as consequences.
Distractor patterns
- Discriminative stimulus when the stem emphasizes value alteration.
- Response generalization when no new response form is described.
- Punishment when behavior increases.
Related terms
MOEOAOSDstimulus control
Related practice prompts
Distinguish motivating operations from discriminative stimuli.
A learner is more likely to request water after recess on hot days. The hot day and exercise most directly alter the value of water as a reinforcer. What concept is illustrated?
Identify stimulus control in instructional contexts.
During following a schedule in a elementary classroom, the participant says "help" only when the therapist holds up a help card, but not when the card is absent. What does this pattern most directly show? The plan must be usable by new staff during routine implementation.
Identify stimulus control in instructional contexts.
During requesting help in a early-intervention session, the participant says "help" only when the therapist holds up a help card, but not when the card is absent. What does this pattern most directly show? The BCBA is reviewing the decision with a trainee.