Behavioral Approaches to Addiction Part 2: Operant, Classical, and Social Learning
Behavioral Approaches to Addiction (Part 2)
Overview of Operant Conditioning in Addiction
Dr. Mary Loos presents the second part of behavioral approaches to addiction, focusing on how the timing and consistency of reinforcement and punishment influence behavior. These concepts are used to explain why certain drugs or behaviors lead to addiction more rapidly and why they are particularly resistant to change.
Key areas of focus include:
Immediate vs. delayed reinforcement.
Schedules of reinforcement.
Extinction of learned behaviors.
Immediate vs. Delayed Reinforcement
Associations between a specific behavior and its consequences are formed most rapidly—and exert their strongest influence—when the consequence follows the behavior closely in time.
Definitions
Immediate Reinforcer: A reinforcer that occurs instantly after a behavior is performed.
Example: A laboratory rat receives an injection of heroin immediately following a bar press.
Delayed Reinforcer: A reinforcer that is delayed in time for a certain behavior.
Example: A rat presses a bar and is given an injection of heroin minutes after the bar press.
Impact on Addiction Development
While the "high" produced by a drug is a critical factor in repeated use, the speed of onset is also vital. Drugs that are absorbed quickly due to their chemical structure, or those administered via methods that allow for immediate effect (e.g., intravenous (IV) injection, smoking), are associated with faster learning and higher rates of repeated administration.
Combining immediate reinforcement with drugs that have a short duration of action (such as crack cocaine or heroin) leads to the strongest learning patterns. This result is a rapid increase in drug-taking behavior because frequent administration is required to maintain the effect.
Challenges in Quitting
In the context of cessation, behavioral associations often work against the individual:
Delayed Reinforcement for Quitting: Lon-term benefits like improved health or better relationships are delayed and do not influence behavior as strongly as the immediate reward provided by the drug.
Immediate Punishment for Quitting: The immediate negative consequences of quitting (e.g., gaining pounds during smoking cessation) often outweigh the delayed punishment of long-term health risks, such as lung cancer or Chronic Obstructive Pulmonary Disease (COPD).
Schedules of Reinforcement
Schedules of reinforcement refer to the predictability and frequency with which reinforcement is provided. These schedules determine how often a behavior occurs, the pattern of that behavior, and how long the behavior persists once reinforcement stops.
Types of Schedules
Continuous Reinforcement: A ratio of behavior to reward. Learning occurs quickly; however, the reward may lose its reinforcing value if it occurs constantly.
Intermittent Reinforcement: Reinforcement is given, but not every time the behavior is performed.
Intermittent Schedule Classifications
Ratio Schedules
Reinforcement is based on the number of behaviors performed.
Fixed Ratio: A set number of behaviors must be performed before a reward is given.
Example: A salesman receives a bonus for every items sold.
Variable Ratio: Rewards are provided after a varying number of behaviors. The organism does not know how many behaviors are required for the next reward.
Interval Schedules
Reinforcement is given when a behavior is performed after a designated period has passed.
Fixed Interval: Reinforcement arrives after a set, predictable period of time.
Example: A teacher gives a scheduled test every weeks, and the student is rewarded with a grade.
Variable Interval: Reinforcement arrives after a variable, unpredictable period of time.
Example: A teacher gives pop quizzes at different intervals, and the student is "rewarded" with a grade.
Addiction by Design: Gambling and Reinforcement
The gambling industry utilizes operant conditioning to maximize profit and player engagement.
Slot Machines and Variable Ratio
Slot machines utilize variable ratio schedules, which produces a high frequency of responding (lever-pulling or button-pressing) that is highly resistant to extinction.
Gambler Typologies and Engineered Rewards
Excitement/Thrill Seekers: These gamblers seek a "big win." They use traditional machines that offer less frequent but larger rewards (jackpots) and are willing to tolerate large, quick losses.
"The Zone" / Time on Device (TOD) Seekers: For these gamblers, the reward is an altered state known as "the zone." The goal is not necessarily money but maximizing time spent on the device. Characteristics of "the zone" include:
Loss of the sense of time.
Decreased awareness of the body and physical discomfort.
Disconnection from social interaction.
Engineering the Experience
Machines for TOD seekers pay out small amounts more consistently. These machines often utilize "false wins," where sounds and lights signal a win even though the player lost part of their original bet. This allows the player to lose money more slowly, extending their time on the device.
Operant Conditioning in Treatment
Contingency Management (CM)
An evidence-based treatment where patients receive rewards to reinforce healthy behaviors like abstinence. Research shows this increases treatment retention.
Voucher-Based Reinforcement (VBR): The patient receives a voucher for every drug-free urine sample. The value of these vouchers increases over time as long as abstinence is maintained.
Prize Incentives CM: Patients receive chances to win cash prizes rather than vouchers.
Extinction
Behaviorists posit that if a behavior and reward are no longer paired, the behavior will eventually die out or be "extinguished."
Obstacles: Drugs are inherently rewarding, making it difficult to "decouple" the behavior from the effect.
Aversive Treatments: Used to create new negative associations (e.g., using Antabuse which causes illness when alcohol is consumed).
Alternative Reinforcement: Stressing the development of new behavior-reward relationships to maintain abstinence.
Community Reinforcement and Family Training (CRAFT)
Developed by Meyers & Wolfe (2004), this family-based intervention focuses on:
Training "concerned significant others" to reward positive, healthy behaviors in the addicted individual.
Training family members not to reinforce unhealthy behaviors.
Allowing the addicted person to experience the natural negative consequences of their actions.
Identifying reinforcements that are specifically important to the drug-abusing person.
Classical Conditioning in Addiction
While operant conditioning focuses on behavior-consequence associations, classical conditioning involves associating one stimulus with another. Specifically, a stimulus that is naturally rewarding or punishing is paired with a neutral stimulus.
Pavlov’s Experiments
Before Conditioning: Food (Unconditioned Stimulus, US) produces salivation (Unconditioned Response, UR). A tone (neutral stimulus) produces no response.
During Conditioning: The neutral stimulus (tone) is paired with the US (food), resulting in the UR (salivation).
After Conditioning: The neutral stimulus becomes a Conditioned Stimulus (CS), which alone elicits salivation, now called the Conditioned Response (CR).
Environmental Cues and Salience
In addiction, classical conditioning pairs the natural pleasure of substances with neutral environmental cues (e.g., getting into a car, the time "after work"). These cues gain salience (greater relevance) and can create powerful behavioral impulses/cravings even in the absence of the drug.
Conditioned Tolerance
This phenomenon occurs because the brain and body attempt to maintain homeostatic functioning (e.g., regulating blood pressure) during drug use.
Mechanism: The body counteracts the drug's effect (e.g., increasing blood pressure to counter a depressant).
Cue-Triggered Compensation: If a specific environment is associated with drug use, just being in that environment triggers the body's compensatory changes in anticipation of the drug. This allows the person to survive higher doses.
Overdose Risk: If a person takes their "usual" high dose in an unfamiliar environment, the lack of environmental cues (CS) means the body does not prepare. The drug effects are not counteracted, leading to profound intoxication or fatal overdose.
Management and Extinction of Classical Cues
Cues serve as triggers for cravings and relapse. Relapse prevention helps people develop strategies to manage these triggers.
Cue Exposure
Process: Clients identify internal states (e.g., sadness) and external elements (people, places, things) associated with use.
Extinction: The person is repeatedly presented with the cue under supervision without the drug. This diminishes the cue's power.
Memory Reconsolidation: This is most effective when the person recalls previous use behaviors while being exposed to the cue without using the substance.
Implications for Treatment
Behaviorists note that associative learning can occur outside of conscious awareness.
Automaticity: Drug-seeking behavior can bypass higher-order decision-making (frontal lobes), leading to automatic responses. Individuals may find themselves in use-situations before they are consciously aware of the decision.
Limitation of Insight: It cannot be assumed that wanting to stop or having "insight" into the problem gives a person complete control over their behavior. This explains why addiction treatment is often a long-term process.
Observational and Social Learning
Also known as Social Learning, this theory suggests we learn not just from our own experiences but by observing the rewards and punishments others receive.
Mechanism: If we perceive a model as similar to us or as having desirable characteristics, we infer that engaging in their behaviors will result in similar rewards.
Addiction Application: Observing peers or famous individuals using substances can lead to a desire to repeat the behavior. Specific influences (peers, family, culture) will be discussed in further detail regarding developmental influences.