Extinction
Extinction Burst
May initially induce 3 effects:
1. Increase in frequency, duration or intensity
2. Novel behaviours
3. Emotional or aggressive behaviours
Spontaneous Recovery
Procedural Variations
Extinction of behaviour maintained by positive reinforcement
- S^R no longer delivered
Extinction of behaviour maintained by negative reinforcement
- Aversive no longer removed
Factors that Influence Extinction
Punishment (S^P)
Positive Punishment
Addition of an aversive stimulus
Negative punishment
Removal of a reinforcing stimulus
Negative Punishment vs Extinction
Punishers
Unconditioned Punishers
-Biologically important
- Do not require conditioning to be effective
Conditioned Punishers
Neutral stimulus paired with established punisher
Factors Influencing Punishment
Immediacy
Contingency (Consistency)
Individual Differences
Magnitude or Amount
Motivating Operations (EOs and AOs)
Motivating Operations (MO)
Antecedents
Momentary effect, not future effect
Alter potency (value) of punisher/reinforcer
Alter likelihood of occurrence of behaviour
EOs and AOs
Establishing Operations (EO)
Makes punisher more effective
More likely to inhibit behaviour
Abolishing Operations (AO)
Makes punisher less effective
Less likely to inhibit behaviour
Potential Problems with Punishment
Aggression or emotional side effects
Escape or avoidance behaviours
Negative reinforcement for using punishment
Modeling use of punishment
Ethical issues
Three-Term-Contingency
Antecedent -> Behaviour -> Consequence
S^D -> Behaviour -> S^R
Discriminative Stimulus (S^D)
Antecedent that is present when the behaviour is reinforced
Does not CAUSE or STRENGTHEN behaviour, EVOKES behaviour
S^D -> Behaviour -> S^R
S-Delta
Antecedent that is present when the behaviour is not reinforced
S-Delta-> Behaviour -> EXT
Stimulus Control
Outcome of stimulus discrimination training
Behaviour more likely in presence of S^D
S^D vs EO
Both antecedents that make behaviour more likely (evoke behaviour)
SD: Reinforcer present when behaviour is reinforced (reinforcer availability)
EO: increase potency of reinforcer (reinforcer effectiveness)
Four-Term-Contingency
EO->S^D->Behaviour->S^R
Antecedent Effects vs Consequent Effects
Antecedents (MO and S^D) alter the current probability of behaviour (in that moment)
Consequences (S^R and S^P) alter the future probability of the behaviour (in the future)