Difference between revisions of "Conditioning"

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Latest revision as of 15:41, 14 April 2014

Conditioning is a training technique that takes one of two forms: Classical/Pavlovian conditioning or Operant/Instrumental conditioning.

Classical and operant conditioning are two important concepts central to behavioral psychology. While both result in learning, the processes are quite different. In order to understand how each of these behavior modification techniques can be used, it is also essential to understand how classical conditioning and operant conditioning differ from one another.[1]

Classical Conditioning

First described by Ivan Pavlov, a Russian physiologist

Involves placing a neutral signal before a reflex

Focuses on involuntary, automatic behaviors

Operant Conditioning

First described by B. F. Skinner, an American psychologist

Involves applying reinforcement or punishment after a behavior

Focuses on strengthening or weakening voluntary behaviors

The Differences Between Classical and Operant Conditioning

One of the simplest ways to remember the differences between classical and operant conditioning is to focus on whether the behavior is involuntary or voluntary. Classical conditioning involves making an association between an involuntary response and a stimulus, while operant conditioning is about making an association between a voluntary behavior and a consequence.

In operant conditioning, the learner is also rewarded with incentives, while classical conditioning involves no such enticements. Also remember that classical conditioning is passive on the part of the learner, while operant conditioning requires the learner to actively participate and perform some type of action in order to be rewarded or punished.

How Classical Conditioning Works

Even if you are not a psychology student, you have probably at least heard about Pavlov's dogs. In his famous experiment, Ivan Pavlov noticed dogs began to salivate in response to a tone after the sound had been repeatedly paired with the presentation of food. Pavlov quickly realized that this was a learned response and set out to further investigate the conditioning process.

Classical conditioning involves pairing a previously neutral stimulus (such as the sound of a bell) with an unconditioned stimulus (the taste of food). This unconditioned stimulus naturally and automatically triggers salivating as a response to the food, which is known as the unconditioned response. After associating the neutral stimulus and the unconditioned stimulus, the sound of the bell alone will start to evoke salivating as a response. The sound of the bell is now known as the conditioned stimulus and salivating in response to the bell is known as the conditioned response.

Some key concepts in classical conditioning

Acquisition

Acquisition is the initial stage of learning when a response is first established and gradually strengthened. For example, imagine that you are conditioning a dog to salivate in response to the sound of a bell. You repeatedly pair the presentation of food with the sound of the bell. You can say the response has been acquired as soon as the dog begins to salivate in response to the bell tone. Once the response has been acquired, you can gradually reinforce the salivation response to make sure the behavior is well learned.

Extinction

Extinction is when the occurrences of a conditioned response decrease or disappear. In classical conditioning, this happens when a conditioned stimulus is no longer paired with an unconditioned stimulus. For example, if the smell of food (the unconditioned stimulus) had been paired with the sound of a whistle (the conditioned stimulus), it would eventually come to evoke the conditioned response of hunger. However, if the unconditioned stimulus (the smell of food) were no longer paired with the conditioned stimulus (the whistle), eventually the conditioned response (hunger) would disappear.

Spontaneous Recovery

Spontaneous Recovery is the reappearance of the conditioned response after a rest period or period of lessened response. If the conditioned stimulus and unconditioned stimulus are no longer associated, extinction will occur very rapidly after a spontaneous recovery.

Stimulus Generalization

Stimulus Generalization is the tendency for the conditioned stimulus to evoke similar responses after the response has been conditioned. For example, if a child has been conditioned to fear a stuffed white rabbit, the child will exhibit fear of objects similar to the conditioned stimulus.

Discrimination

Discrimination is the ability to differentiate between a conditioned stimulus and other stimuli that have not been paired with an unconditioned stimulus. For example, if a bell tone were the conditioned stimulus, discrimination would involve being able to tell the difference between the bell tone and other similar sounds.

How Operant Conditioning Works

Operant (or instrumental) conditioning focuses on using either reinforcement or punishment to increase or decrease a behavior. Through this process, an association is formed between the behavior and the consequences for that behavior. For example, imagine that a trainer is trying to teach a dog to fetch a ball. When the dog successful chases and picks up the ball, the dog receives praise as a reward. When the animal fails to retrieve the ball, the trainer withholds the praise. Eventually, the dog forms an association between his behavior of fetching the ball and receiving the desired reward.

Some key concepts in operant conditioning

Reinforcement is any event that strengthens or increases the behavior it follows. There are two kinds of reinforcers:

- Positive reinforcers are favorable events or outcomes that are presented after the behavior. In situations that reflect positive reinforcement, a response or behavior is strengthened by the addition of something, such as praise or a direct reward.

- Negative reinforcers involve the removal of an unfavorable events or outcomes after the display of a behavior. In these situations, a response is strengthened by the removal of something considered unpleasant.

In both of these cases of reinforcement, the behavior increases.

Punishment, on the other hand, is the presentation of an adverse event or outcome that causes a decrease in the behavior it follows. There are two kinds of punishment:

- Positive punishment, sometimes referred to as punishment by application, involves the presentation of an unfavorable event or outcome in order to weaken the response it follows.

- Negative punishment, also known as punishment by removal, occurs when an favorable event or outcome is removed after a behavior occurs.

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 Conditioning is a training technique that takes one of two forms:  Classical/Pavlovian conditioning or Operant/Instrumental conditioning.
-== Classical Conditioning ==
+Classical and operant conditioning are two important concepts central to behavioral psychology. While both result in learning, the processes are quite different. In order to understand how each of these behavior modification techniques can be used, it is also essential to understand how classical conditioning and operant conditioning differ from one another.[http://psychology.about.com/bio/Kendra-Van-Wagner-17268.htm]
-Classical conditioning (also Pavlovian conditioning or respondent conditioning) is a kind of learning that occurs when a conditioned stimulus (CS) is paired with an unconditioned stimulus (US). Usually, the CS is a neutral stimulus (e.g., the sound of a tuning fork), the US is biologically potent (e.g., the taste of food) and the unconditioned response (UR) to the US is an unlearned reflex response (e.g., salivation). After pairing is repeated (some learning may occur already after only one pairing), the organism exhibits a conditioned response (CR) to the CS when the CS is presented alone. The CR is usually similar to the UR (see below), but unlike the UR, it must be acquired through experience and is relatively impermanent.
+'''Classical Conditioning'''
-Classical conditioning differs from operant or instrumental conditioning, in which a behavior is strengthened or weakened, depending on its consequences (i.e., reward or punishment).
+*First described by Ivan Pavlov, a Russian physiologist
-A classic experiment by Pavlov exemplifies the standard procedure used in classical conditioning.  First Pavlov observed the UR (salivation) produced when meat powder (US) was placed in the dog's mouth. He then rang a bell (CS) before giving the meat powder. After some repetitions of this pairing of bell and meat the dog salivated to the bell alone, demonstrating what Pavlov called a "conditional" response, now commonly termed "conditioned response" or CR.
-It is often thought that the conditioned response is a replica of the unconditioned response, but Pavlov noted that saliva produced by the CS differs in composition from what is produced by the US. In fact, the CR may be any new response to the previously neutral CS that can be clearly linked to experience with the conditional relationship of CS and US. It was also thought that repeated pairings are necessary for conditioning to emerge, however many CRs can be learned with a single trial as in fear conditioning and taste aversion learning.
+*Involves placing a neutral signal before a reflex
-=== Forward Conditioning ===
+*Focuses on involuntary, automatic behaviors
-Learning is fastest in forward conditioning. During forward conditioning, the onset of the CS precedes the onset of the US in order to signal that the US will follow. Two common forms of forward conditioning are delay and trace conditioning.
-*Delay conditioning: In delay conditioning the CS is presented and is overlapped by the presentation of the US. The difference between trace conditioning and delay conditioning is that in the delayed procedure the CS and US overlap.
+'''Operant Conditioning'''
-*Trace conditioning: During trace conditioning the CS and US do not overlap. Instead, the CS begins and ends before the US is presented. The stimulus-free period is called the trace interval. It may also be called the conditioning interval. For example: If you sound a buzzer for 5 seconds and then, a second later, puff air into a person’s eye, the person will blink. After several pairings of the buzzer and puff the person will blink at the sound of the buzzer alone.
+*First described by B. F. Skinner, an American psychologist
-[[File:File:Classical Conditioning.svg.png|424px|thumb|left|Classical Conditioning]]
+*Involves applying reinforcement or punishment after a behavior
-=== Simultaneous conditioning ===
+*Focuses on strengthening or weakening voluntary behaviors
-Classical conditioning procedures and effects
+== The Differences Between Classical and Operant Conditioning ==
-During simultaneous conditioning, the CS and US are presented and terminated at the same time.
-For example: If you ring a bell and blow a puff of air into a person’s eye at the same moment, you have accomplished to coincide the CS and US.
-=== Second-order and higher-order conditioning ===
+One of the simplest ways to remember the differences between classical and operant conditioning is to focus on whether the behavior is involuntary or voluntary. Classical conditioning involves making an association between an involuntary response and a stimulus, while operant conditioning is about making an association between a voluntary behavior and a consequence.
-This form of conditioning follows a two-step procedure. First a neutral stimulus (“CS1”) comes to signal a US through forward conditioning. Then a second neutral stimulus (“CS2”) is paired with the first (CS1) and comes to yield its own conditioned response. For example: a bell might be paired with food until the bell elicits salivation. If a light is then paired with the bell, then the light may come to elicit salivation as well. The bell is the CS1 and the food is the US. The light becomes the CS2 once it is paired with the CS1
+In operant conditioning, the learner is also rewarded with incentives, while classical conditioning involves no such enticements. Also remember that classical conditioning is passive on the part of the learner, while operant conditioning requires the learner to actively participate and perform some type of action in order to be rewarded or punished.
+== How Classical Conditioning Works ==
-=== Backward conditioning ===
+Even if you are not a psychology student, you have probably at least heard about Pavlov's dogs. In his famous experiment, Ivan Pavlov noticed dogs began to salivate in response to a tone after the sound had been repeatedly paired with the presentation of food. Pavlov quickly realized that this was a learned response and set out to further investigate the conditioning process.
-Backward conditioning occurs when a CS immediately follows a US. Unlike the usual conditioning procedure, in which the CS precedes the US, the conditioned response given to the CS tends to be inhibitory. This presumably happens because the CS serves as a signal that the US has ended, rather than as a signal that the US is about to appear. For example, a puff of air directed at a person's eye could be followed by the sound of a buzzer.
+Classical conditioning involves pairing a previously neutral stimulus (such as the sound of a bell) with an unconditioned stimulus (the taste of food). This unconditioned stimulus naturally and automatically triggers salivating as a response to the food, which is known as the unconditioned response. After associating the neutral stimulus and the unconditioned stimulus, the sound of the bell alone will start to evoke salivating as a response. The sound of the bell is now known as the conditioned stimulus and salivating in response to the bell is known as the conditioned response.
-=== Temporal conditioning ===
+=== Some key concepts in classical conditioning ===
-Temporal conditioning is when a US is presented at regular intervals, for instance every 10 minutes. Conditioning is said to have occurred when the CR tends to occur shortly before each US. This suggests that animals have a biological clock that can serve as a CS. This method has also been used to study timing ability in animals. (see Animal cognition).
+*Acquisition
-=== Zero contingency procedure ===
+Acquisition is the initial stage of learning when a response is first established and gradually strengthened. For example, imagine that you are conditioning a dog to salivate in response to the sound of a bell. You repeatedly pair the presentation of food with the sound of the bell. You can say the response has been acquired as soon as the dog begins to salivate in response to the bell tone. Once the response has been acquired, you can gradually reinforce the salivation response to make sure the behavior is well learned.
-In this procedure, the CS is paired with the US, but the US also occurs at other times. If this occurs, it is predicted that the US is likely to happen in the absence of the CS. In other words, the CS does not "predict" the US. In this case, conditioning fails and the CS does not come to elicit a CR. This finding - that prediction rather than CS-US pairing is the key to conditioning - greatly influenced subsequent conditioning research and theory.
+*Extinction
-=== Extinction ===
+Extinction is when the occurrences of a conditioned response decrease or disappear. In classical conditioning, this happens when a conditioned stimulus is no longer paired with an unconditioned stimulus. For example, if the smell of food (the unconditioned stimulus) had been paired with the sound of a whistle (the conditioned stimulus), it would eventually come to evoke the conditioned response of hunger. However, if the unconditioned stimulus (the smell of food) were no longer paired with the conditioned stimulus (the whistle), eventually the conditioned response (hunger) would disappear.
-In the extinction procedure, the CS is presented repeatedly in the absence of a US. This is done after a CS has been conditioned by one of the methods above. When this is done the CR frequency eventually returns to pre-training levels. However, spontaneous recovery (and other related phenomena, see "Recovery from extinction" below) show that extinction does not completely eliminate the effects of the prior conditioning. Spontaneous recovery is when there is a sudden appearance of the (CR) after extinction occurs.
+* Spontaneous Recovery
-== Instrumental Conditioning ==
+Spontaneous Recovery is the reappearance of the conditioned response after a rest period or period of lessened response. If the conditioned stimulus and unconditioned stimulus are no longer associated, extinction will occur very rapidly after a spontaneous recovery.
-Operant conditioning (or instrumental conditioning) is a type of learning in which an individual's behavior is modified by its antecedents and consequences. Instrumental conditioning was first discovered and published by Jerzy Konorski and was also referred to as Type II reflexes. Mechanisms of instrumental conditioning suggest that the behavior may change in form, frequency, or strength. The expressions "operant behavior" and "respondent behavior" were popularized by B. F. Skinner who worked on reproduction of Konorski's experiments. The former refers to "an item of behavior that is initially spontaneous, rather than a response to a prior stimulus, but whose consequences may reinforce or inhibit recurrence of that behavior".
+*Stimulus Generalization
-Operant conditioning is distinguished from classical conditioning (or respondent conditioning) in that operant conditioning deals with the reinforcement and punishment to change behavior. Operant behavior operates on the environment and is maintained by conditioning of reflexive (reflex) behaviors which are also elicited by antecedent conditions, while classical conditioning is maintained by its antecedents and consequences. Behaviors conditioned through a classical conditioning procedure are not maintained by consequences. They both, however, form the core of behavior analysis and have grown into professional practices.
+Stimulus Generalization is the tendency for the conditioned stimulus to evoke similar responses after the response has been conditioned. For example, if a child has been conditioned to fear a stuffed white rabbit, the child will exhibit fear of objects similar to the conditioned stimulus.
+*Discrimination
+Discrimination is the ability to differentiate between a conditioned stimulus and other stimuli that have not been paired with an unconditioned stimulus. For example, if a bell tone were the conditioned stimulus, discrimination would involve being able to tell the difference between the bell tone and other similar sounds.
+== How Operant Conditioning Works ==
+Operant (or instrumental) conditioning focuses on using either reinforcement or punishment to increase or decrease a behavior. Through this process, an association is formed between the behavior and the consequences for that behavior. For example, imagine that a trainer is trying to teach a dog to fetch a ball. When the dog successful chases and picks up the ball, the dog receives praise as a reward. When the animal fails to retrieve the ball, the trainer withholds the praise. Eventually, the dog forms an association between his behavior of fetching the ball and receiving the desired reward.
+=== Some key concepts in operant conditioning ===
+*Reinforcement is any event that strengthens or increases the behavior it follows. There are two kinds of reinforcers:
+**Positive reinforcers are favorable events or outcomes that are presented after the behavior. In situations that reflect positive reinforcement, a response or behavior is strengthened by the addition of something, such as praise or a direct reward.
+**Negative reinforcers involve the removal of an unfavorable events or outcomes after the display of a behavior. In these situations, a response is strengthened by the removal of something considered unpleasant.
+In both of these cases of reinforcement, the behavior increases.
+*Punishment, on the other hand, is the presentation of an adverse event or outcome that causes a decrease in the behavior it follows. There are two kinds of punishment:
+**Positive punishment, sometimes referred to as punishment by application, involves the presentation of an unfavorable event or outcome in order to weaken the response it follows.
+**Negative punishment, also known as punishment by removal, occurs when an favorable event or outcome is removed after a behavior occurs.
+[[Category:Slave Training]]