Shaping and Successive Approximations

Operant conditioning is learning that occurs based on the consequences of behavior and involve the learning of new actions. It commonly uses reinforcement and punishment to influence behavior. Reinforcement is anything that increases the desired behavior, while punishment is anything that decreases the undesired behavior. Additionally, there is both positive and negative types for reinforcement and punishment. Positive is when something pleasant is added, while negative is when something unpleasant is removed. For example, when your mom is nagging you to clean your room, and then you clean it, so she stops nagging; the nagging is the negative reinforcement because the stimulus is removed (nagging) to increase the desired behavior (cleaning your room).

One type of operant conditioning that is used is called shaping, which is how reinforcers guide behavior closer towards a desired behavior. This is how dogs are trained. Complex behaviors are able to be created through this technique. By using successive approximations, or “middle steps,” animals are able to be trained to do complex behaviors such as discriminating many types of objects and events.

I trained my dog, Hudson (pictured above), to play dead using shaping and successive approximations. I used a high-value treat as positive reinforcement when Hudson completed the desired behavior. We started by having him lay down from a standing position. This was easy because he had learned to lie down previously. Then we had him roll onto his back with his feet up. This was a little more challenging because it was not necessarily biologically predisposed to voluntarily lying on his back. This took about 2 days to get him to do correctly. Then we also taught him to “come alive” which was his release phase. This did not take long for him to learn. Through shaping and using in between steps to teach him, Hudson successfully learned to play dead and come alive!

 

Reinforcements and Punishments

In class we learned about the types of operant conditioning.  We learned that reinforcements are any event that strengthens behavior.  Positive reinforcement is when you increase a behavior by presenting a positive stimuli, and negative reinforcement is when you increase a behavior by removing a negative stimuli.  Punishments, on the other hand, are any event that decreases behavior.  Positive punishment is when you decrease a behavior by presenting an aversive stimulus, and negative punishment is when you decrease a behavior by removing a desirable stimulus.

When determining the type of operant conditioning, we were taught to first look at whether the behavior is going up or down in order to determine if it is a reinforcement or a punishment.  The next thing to look at is if something is being added or taken away in order to determine if it is positive or negative.

https://www.google.com/url?sa=i&url=https%3A%2F%2Fwikispaces.psu.edu%2Fdisplay%2FPSYCH484%2F3.%2BReinforcement%2BTheory&psig=AOvVaw3ONZE5mpldezDi5LWsr6a-&ust=1573775036612000&source=images&cd=vfe&ved=0CAIQjRxqFwoTCJibgYKv6OUCFQAAAAAdAAAAABAD

An example of this that I have experienced was in sixth grade.  We had five notecards with our names on them, and if we got in trouble, we would get a notecard taken away.  If we got all five notecards taken away by the end of the week, we wouldn’t get to participate in the activity that week, which was just like an extra recess.  To determine what type of operant conditioning this was we can first look at whether the teacher intended for the behavior to increase or decrease.  In this case, the behavior was being bad or getting in trouble, and the teacher intended for this behavior to go down, making it a punishment.  The next thing to look at is if something is being taken away or added.  In this case, the activity at the end of the week was being taken away, making it negative.

I think everyone has experienced the use of operant conditioning to change some kind of behavior, especially younger kids, and this is one of my experiences with it.