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Chapter 4

Chapter 4. Reinforcement. Reinforcement:. Is a basic principle of behavior Was established by Skinner in laboratory research and over 40 years of human research Is a component of many behavior modification procedures. Defining Reinforcement. 1. The occurrence of a behavior

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Chapter 4

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  1. Chapter 4 Reinforcement

  2. Reinforcement: • Is a basic principle of behavior • Was established by Skinner in laboratory research and over 40 years of human research • Is a component of many behavior modification procedures

  3. Defining Reinforcement 1. The occurrence of a behavior 2. Results immediately in a consequence 3. The behavior is strengthened (more likely to occur again in the future in similar circumstances) • Present ----> Behavior is followed by a consequence • Future ----> Behavior is more likely to occur ** Functional definition of reinforcement

  4. Effects of Reinforcement on Behavior • Increase in frequency • Increase in duration • Increase in intensity • Increase in quickness (decrease in latency)

  5. What is Operant Behavior? • Behavior that is strengthened through the process of reinforcement - behavior that is controlled by its consequences

  6. What is a Reinforcer? • The consequence (stimulus or event) that follows operant behavior & strengthens operant behavior

  7. Two types of reinforcement • Positive reinforcement • Negative reinforcement • Both positive reinforcement and negative reinforcement strengthen behavior - make the behavior more likely to occur in the future

  8. What is Positive Reinforcement? • Behavior is followed by the presentation of a stimulus (a reinforcer) and the behavior is strengthened

  9. What is Negative Reinforcement? • Behavior is followed by the removal of a stimulus (a punisher / aversive stimulus) and the behavior is strengthened

  10. Escape and avoidance behaviors: • are involved in negative reinforcement • Escape - the behavior results in the termination of (escape from) the aversive stimulus and the behavior is strengthened. • Avoidance - the behavior results in the prevention of (avoidance of) the aversive stimulus and the behavior is strengthened.

  11. Everyday Examples of Negative Reinforcement • Turn the channel during a bad TV show • Put on a coat on a cold day • Use an umbrella • Slap a mosquito • Turn up the heat • Roll up the window when it rains • Wear earplugs on a noisy job • Turn down the lights, TV, stereo • Turn on the exhaust fan • Loosen a tight collar or tie • Turn off the alarm buzzer • Give in to a screaming kid • Tell someone to be quiet in a movie

  12. Positive and Negative Reinforcement in the Same Situation Tantrum in a grocery store • Child’s tantrum behavior is strengthened by getting candy from a parent (positive reinforcement) • Parent’s behavior of giving candy to child is strengthened by termination of the tantrum (negative reinforcement)

  13. Unconditioned Reinforcers • Biologically determined - survival value for the individual • Food, water, human contact (warmth), oxygen, sexual contact, escape from cold, heat, pain, extreme levels of stimulation

  14. Conditioned Reinforcers • A previously neutral stimulus - repeatedly paired with an established reinforcer (an unconditioned or conditioned reinforcer) - will function as a reinforcer • Examples of Conditioned Reinforcers Sight, sound, and scent of parents Parents’ smile, tone of voice, attention, praise Types of toys, TV shows, music, clothes, activities Grades, positive evaluations Accomplishments (social, physical) Money Others

  15. Conditioned Generalized Reinforcers • Paired with a wide variety of other reinforcers • Money, praise, tokens

  16. Factors that Influence Reinforcement • Immediacy • Consistency (contingency) • Establishing operations • Individual differences • Intensity of the stimulus

  17. Schedules of Reinforcement • Specifies which responses will be followed by the reinforcer • Continuous reinforcement - Each response is followed by the reinforcer • Intermittent reinforcement - Not every response is followed by a reinforcer

  18. Fixed Ratio Schedules • Reinforcer after X number of responses - the number does not change • Produces high rate / post reinforcement pause • Examples: piece rate pay classroom uses

  19. Variable Ratio Schedules • Reinforcer after X number of responses on the average • Produces high rate / no post-reinforcement pause • Examples: work and classroom uses slot machine, phone solicitors

  20. Fixed Interval Schedules • Reinforcer for the first response after X amount of time - time interval does not change • Produces low rate of responding that increases at the end of the interval • Rarely used in behavior modification • Examples: mail delivery every 2 hours hourly supervisor checks on a worker

  21. Variable Interval Schedules • Reinforcer for the first response after X amount of time on the average • Produces low but steady rate of behavior • Rarely used in behavior modification • Examples: unpredictable supervisor checks, checking for phone or e-mail messages

  22. Concurrent Schedules of Reinforcement • Schedules of reinforcement that exist at the same time for two or more different behaviors • Concurrent operants • Factors influencing choice of concurrent operants - schedule of reinforcement - magnitude of reinforcement - immediacy of reinforcement - response effort

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