Consequences of a Behavior Will Determine Whether It Occurs Again or Not

Basic Principles of Operant Conditioning: Thorndike'south Police of Outcome

Thorndike'due south constabulary of effect states that behaviors are modified by their positive or negative consequences.

Learning Objectives

Relate Thorndike's law of event to the principles of operant conditioning

Primal Takeaways

Fundamental Points

• The law of effect states that responses that produce a satisfying consequence in a detail situation become more likely to occur once more, while responses that produce a discomforting result are less probable to be repeated.
• Edward L. Thorndike first studied the police force of effect by placing hungry cats within puzzle boxes and observing their deportment. He speedily realized that cats could larn the efficacy of certain behaviors and would repeat those behaviors that immune them to escape faster.
• The police force of effect is at work in every human behavior as well. From a young age, nosotros learn which actions are beneficial and which are detrimental through a similar trial and mistake process.
• While the police force of outcome explains behavior from an external, observable signal of view, it does not account for internal, unobservable processes that as well affect the behavior patterns of human beings.

Key Terms

• Police of Effect: A law developed by Edward L. Thorndike that states, "responses that produce a satisfying effect in a particular situation become more probable to occur again in that state of affairs, and responses that produce a discomforting effect get less likely to occur again in that situation."
• behavior modification: The act of altering actions and reactions to stimuli through positive and negative reinforcement or punishment.
• trial and mistake: The procedure of finding a solution to a problem by trying many possible solutions and learning from mistakes until a fashion is constitute.

Operant conditioning is a theory of learning that focuses on changes in an individual'southward observable behaviors. In operant conditioning, new or connected behaviors are impacted by new or continued consequences. Inquiry regarding this principle of learning first began in the late 19th century with Edward L. Thorndike, who established the law of upshot.

Thorndike's Experiments

Thorndike's near famous work involved cats trying to navigate through diverse puzzle boxes. In this experiment, he placed hungry cats into homemade boxes and recorded the time it took for them to perform the necessary actions to escape and receive their food advantage. Thorndike discovered that with successive trials, cats would learn from previous behavior, limit ineffective actions, and escape from the box more quickly. He observed that the cats seemed to acquire, from an intricate trial and fault process, which actions should be continued and which actions should be abased; a well-practiced true cat could apace call back and reuse actions that were successful in escaping to the food advantage.

Thorndike'south puzzle box: This image shows an case of Thorndike'south puzzle box aslope a graph demonstrating the learning of a cat within the box. As the number of trials increased, the cats were able to escape more than quickly by learning.

The Constabulary of Effect

Thorndike realized not only that stimuli and responses were associated, just also that behavior could be modified by consequences. He used these findings to publish his now famous "police of effect" theory. According to the law of effect, behaviors that are followed past consequences that are satisfying to the organism are more likely to be repeated, and behaviors that are followed past unpleasant consequences are less likely to exist repeated. Essentially, if an organism does something that brings about a desired upshot, the organism is more than likely to do it over again. If an organism does something that does not bring about a desired effect, the organism is less likely to do it over again.

Law of effect: Initially, cats displayed a variety of behaviors inside the box. Over successive trials, actions that were helpful in escaping the box and receiving the food reward were replicated and repeated at a college rate.

Thorndike'southward police of issue now informs much of what we know almost operant conditioning and behaviorism. Co-ordinate to this constabulary, behaviors are modified past their consequences, and this basic stimulus-response relationship can be learned by the operant person or brute. Once the association betwixt beliefs and consequences is established, the response is reinforced, and the association holds the sole responsibility for the occurrence of that behavior. Thorndike posited that learning was simply a change in behavior every bit a upshot of a outcome, and that if an action brought a reward, it was stamped into the listen and bachelor for recall later.

From a young age, we learn which deportment are benign and which are detrimental through a trial and error process. For example, a young child is playing with her friend on the playground and playfully pushes her friend off the swingset. Her friend falls to the ground and begins to cry, and then refuses to play with her for the rest of the twenty-four hour period. The kid's actions (pushing her friend) are informed past their consequences (her friend refusing to play with her), and she learns non to repeat that action if she wants to continue playing with her friend.

The police of issue has been expanded to diverse forms of behavior modification. Because the law of effect is a primal component of behaviorism, information technology does not include any reference to unobservable or internal states; instead, it relies solely on what can be observed in human behavior. While this theory does non account for the entirety of human behavior, it has been applied to nearly every sector of homo life, simply particularly in didactics and psychology.

Bones Principles of Operant Conditioning: Skinner

B. F. Skinner was a behavioral psychologist who expanded the field by defining and elaborating on operant workout.

Learning Objectives

Summarize Skinner'due south research on operant workout

Cardinal Takeaways

Key Points

• B. F. Skinner, a behavioral psychologist and a student of E. 50. Thorndike, contributed to our view of learning by expanding our agreement of conditioning to include operant conditioning.
• Skinner theorized that if a behavior is followed by reinforcement, that behavior is more than likely to be repeated, only if it is followed by punishment, it is less probable to be repeated.
• Skinner conducted his research on rats and pigeons by presenting them with positive reinforcement, negative reinforcement, or penalization in diverse schedules that were designed to produce or inhibit specific target behaviors.
• Skinner did not include room in his research for ideas such equally complimentary will or individual choice; instead, he posited that all behavior could be explained using  learned, physical aspects of the earth, including life history and evolution.

Key Terms

• penalty: The deed or process of imposing and/or applying a sanction for an undesired beliefs when workout toward a desired behavior.
• aversive: Disposed to repel, causing abstention (of a situation, a behavior, an item, etc.).
• superstition: A belief, non based on reason or scientific cognition, that future events may be influenced past i's behavior in some magical or mystical way.

Operant conditioning is a theory of behaviorism that focuses on changes in an individual'due south appreciable behaviors. In operant conditioning, new or continued behaviors are impacted by new or continued consequences. Research regarding this principle of learning was start conducted by Edward L. Thorndike in the late 1800s, and so brought to popularity by B. F. Skinner in the mid-1900s. Much of this research informs current practices in homo beliefs and interaction.

Skinner's Theories of Operant Conditioning

About half a century after Thorndike'southward showtime publication of the principles of operant workout and the police force of outcome, Skinner attempted to prove an extension to this theory—that all behaviors are in some way a consequence of operant conditioning. Skinner theorized that if a behavior is followed by reinforcement, that behavior is more likely to be repeated, but if it is followed by some sort of aversive stimuli or punishment, it is less likely to be repeated. He besides believed that this learned association could end, or get extinct, if the reinforcement or penalty was removed.

B. F. Skinner: Skinner was responsible for defining the segment of behaviorism known as operant conditioning—a process by which an organism learns from its physical environment.

Skinner'due south Experiments

Skinner's almost famous enquiry studies were simple reinforcement experiments conducted on lab rats and domestic pigeons, which demonstrated the most basic principles of operant conditioning. He conducted most of his enquiry in a special cumulative recorder, now referred to as a "Skinner box," which was used to clarify the behavioral responses of his test subjects. In these boxes he would present his subjects with positive reinforcement, negative reinforcement, or aversive stimuli in various timing intervals (or "schedules") that were designed to produce or inhibit specific target behaviors.

In his first work with rats, Skinner would place the rats in a Skinner box with a lever attached to a feeding tube. Whenever a rat pressed the lever, food would exist released. Afterwards the feel of multiple trials, the rats learned the association between the lever and food and began to spend more of their fourth dimension in the box procuring food than performing any other action. It was through this early work that Skinner started to sympathise the furnishings of behavioral contingencies on actions. He discovered that the rate of response—also as changes in response features—depended on what occurred after the behavior was performed, not before. Skinner named these deportment operant behaviors because they operated on the surroundings to produce an outcome. The process by which one could arrange the contingencies of reinforcement responsible for producing a certain beliefs then came to exist called operant conditioning.

To prove his idea that behaviorism was responsible for all deportment, he later created a "superstitious pigeon." He fed the pigeon on continuous intervals (every 15 seconds) and observed the dove's behavior. He constitute that the pigeon's deportment would change depending on what it had been doing in the moments before the nutrient was dispensed, regardless of the fact that those actions had nothing to do with the dispensing of food. In this style, he discerned that the pigeon had fabricated a causal relationship between its actions and the presentation of reward. It was this development of "superstition" that led Skinner to believe all behavior could be explained as a learned reaction to specific consequences.

In his operant conditioning experiments, Skinner often used an approach called shaping. Instead of rewarding only the target, or desired, behavior, the process of shaping involves the reinforcement of successive approximations of the target behavior. Behavioral approximations are behaviors that, over fourth dimension, grow increasingly closer to the actual desired response.

Skinner believed that all behavior is predetermined by past and present events in the objective world. He did not include room in his inquiry for ideas such as free will or private pick; instead, he posited that all beliefs could be explained using learned, physical aspects of the world, including life history and evolution. His work remains extremely influential in the fields of psychology, behaviorism, and teaching.

Shaping

Shaping is a method of operant conditioning past which successive approximations of a target behavior are reinforced.

Learning Objectives

Draw how shaping is used to modify behavior

Primal Takeaways

Key Points

• B. F. Skinner used shaping —a method of training by which successive approximations toward a target behavior are reinforced—to test his theories of behavioral psychology.
• Shaping involves a calculated reinforcement of a "target beliefs": it uses operant conditioning principles to railroad train a subject by rewarding proper behavior and discouraging improper behavior.
• The method requires that the bailiwick perform behaviors that at first merely resemble the target behavior; through reinforcement, these behaviors are gradually inverse or "shaped" to encourage the target beliefs itself.
• Skinner's early experiments in operant conditioning involved the shaping of rats' beliefs so they learned to press a lever and receive a food reward.
• Shaping is unremarkably used to train animals, such as dogs, to perform difficult tasks; it is also a useful learning tool for modifying human behavior.

Key Terms

• successive approximation: An increasingly accurate estimate of a response desired by a trainer.
• paradigm: An example serving as a model or pattern; a template, every bit for an experiment.
• shaping: A method of positive reinforcement of behavior patterns in operant workout.

In his operant-conditioning experiments, Skinner often used an approach called shaping. Instead of rewarding only the target, or desired, behavior, the process of shaping involves the reinforcement of successive approximations of the target behavior. The method requires that the subject perform behaviors that at starting time only resemble the target behavior; through reinforcement, these behaviors are gradually changed, or shaped, to encourage the operation of the target behavior itself. Shaping is useful considering it is often unlikely that an organism will brandish anything but the simplest of behaviors spontaneously. Information technology is a very useful tool for training animals, such every bit dogs, to perform hard tasks.

Dog testify: Dog training often uses the shaping method of operant conditioning.

How Shaping Works

In shaping, behaviors are cleaved down into many small, achievable steps. To exam this method, B. F. Skinner performed shaping experiments on rats, which he placed in an apparatus (known as a Skinner box) that monitored their behaviors. The target behavior for the rat was to printing a lever that would release food. Initially, rewards are given for even rough approximations of the target behavior—in other words, even taking a step in the right direction. Then, the trainer rewards a behavior that is one step closer, or 1 successive approximation nearer, to the target behavior. For example, Skinner would reward the rat for taking a footstep toward the lever, for continuing on its hind legs, and for touching the lever—all of which were successive approximations toward the target behavior of pressing the lever.

As the subject moves through each beliefs trial, rewards for old, less approximate behaviors are discontinued in lodge to encourage progress toward the desired beliefs. For case, one time the rat had touched the lever, Skinner might stop rewarding it for only taking a step toward the lever. In Skinner's experiment, each reward led the rat closer to the target behavior, finally culminating in the rat pressing the lever and receiving nutrient. In this fashion, shaping uses operant-conditioning principles to train a subject past rewarding proper behavior and discouraging improper beliefs.

In summary, the process of shaping includes the post-obit steps:

• Reinforce any response that resembles the target behavior.
• Then reinforce the response that more closely resembles the target behavior. Y'all volition no longer reinforce the previously reinforced response.
• Next, begin to reinforce the response that fifty-fifty more closely resembles the target beliefs. Continue to reinforce closer and closer approximations of the target behavior.
• Finally, only reinforce the target beliefs.

Applications of Shaping

This procedure has been replicated with other animals—including humans—and is at present common exercise in many grooming and teaching methods. It is commonly used to train dogs to follow verbal commands or go house-broken: while puppies can rarely perform the target behavior automatically, they tin exist shaped toward this behavior by successively rewarding behaviors that come close.

Shaping is also a useful technique in homo learning. For example, if a father wants his daughter to acquire to make clean her room, he can use shaping to help her chief steps toward the goal. First, she cleans up one toy and is rewarded. 2nd, she cleans upwards five toys; then chooses whether to choice upwardly 10 toys or put her books and clothes away; then cleans up everything except ii toys. Through a serial of rewards, she finally learns to clean her entire room.

Reinforcement and Punishment

Reinforcement and punishment are principles of operant conditioning that increase or subtract the likelihood of a beliefs.

Learning Objectives

Differentiate among primary, secondary, conditioned, and unconditioned reinforcers

Key Takeaways

Primal Points

• " Reinforcement " refers to any event that increases the likelihood of a particular behavioral response; " punishment " refers to a event that decreases the likelihood of this response.
• Both reinforcement and punishment can be positive or negative. In operant conditioning, positive ways you lot are calculation something and negative means you are taking something abroad.
• Reinforcers tin be either principal (linked unconditionally to a behavior) or secondary (requiring deliberate or conditioned linkage to a specific beliefs).
• Main—or unconditioned—reinforcers, such every bit water, food, slumber, shelter, sex, touch, and pleasure, accept innate reinforcing qualities.
• Secondary—or conditioned—reinforcers (such equally money) have no inherent value until they are linked or paired with a primary reinforcer.

Key Terms

• latency: The delay between a stimulus and the response it triggers in an organism.

Reinforcement and penalty are principles that are used in operant workout. Reinforcement means you lot are increasing a beliefs: it is whatsoever consequence or consequence that increases the likelihood of a item behavioral response (and that therefore reinforces the beliefs). The strengthening effect on the behavior can manifest in multiple ways, including higher frequency, longer duration, greater magnitude, and short latency of response. Penalty means you lot are decreasing a behavior: it is any consequence or outcome that decreases the likelihood of a behavioral response.

Extinction , in operant conditioning, refers to when a reinforced behavior is extinguished entirely. This occurs at some signal afterward reinforcement stops; the speed at which this happens depends on the reinforcement schedule, which is discussed in more particular in some other section.

Positive and Negative Reinforcement and Penalty

Both reinforcement and punishment can exist positive or negative. In operant conditioning, positive and negative do not hateful good and bad. Instead, positive means you are adding something and negative ways you are taking something away. All of these methods can manipulate the beliefs of a discipline, simply each works in a unique fashion.

Operant conditioning: In the context of operant conditioning, whether y'all are reinforcing or punishing a beliefs, "positive" e'er means you are adding a stimulus (non necessarily a good one), and "negative" e'er means you lot are removing a stimulus (non necessarily a bad one. See the blue text and yellowish text above, which represent positive and negative, respectively. Similarly, reinforcement ever means you are increasing (or maintaining) the level of a behavior, and punishment always means you lot are decreasing the level of a behavior. See the green and red backgrounds above, which correspond reinforcement and punishment, respectively.

• Positive reinforcers add a wanted or pleasant stimulus to increment or maintain the frequency of a beliefs. For example, a child cleans her room and is rewarded with a cookie.
• Negative reinforcers remove an aversive or unpleasant stimulus to increment or maintain the frequency of a behavior. For example, a child cleans her room and is rewarded by not having to wash the dishes that dark.
• Positive punishments add an aversive stimulus to subtract a behavior or response. For instance, a child refuses to clean her room so her parents make her wash the dishes for a calendar week.
• Negative punishments remove a pleasant stimulus to decrease a behavior or response. For instance, a kid refuses to clean her room and so her parents refuse to let her play with her friend that afternoon.

Primary and Secondary Reinforcers

The stimulus used to reinforce a certain behavior can be either primary or secondary. A chief reinforcer, besides called an unconditioned reinforcer, is a stimulus that has innate reinforcing qualities. These kinds of reinforcers are not learned. H2o, food, sleep, shelter, sex, touch, and pleasure are all examples of primary reinforcers: organisms do not lose their drive for these things. Some chief reinforcers, such as drugs and alcohol, merely mimic the effects of other reinforcers. For most people, jumping into a cool lake on a very hot day would exist reinforcing and the cool lake would be innately reinforcing—the water would cool the person off (a concrete need), as well as provide pleasance.

A secondary reinforcer, also called a conditioned reinforcer, has no inherent value and simply has reinforcing qualities when linked or paired with a primary reinforcer. Before pairing, the secondary reinforcer has no meaningful result on a subject. Money is i of the all-time examples of a secondary reinforcer: it is only worth something considering yous can use information technology to purchase other things—either things that satisfy bones needs (nutrient, water, shelter—all main reinforcers) or other secondary reinforcers.

Schedules of Reinforcement

Reinforcement schedules determine how and when a beliefs will be followed by a reinforcer.

Learning Objectives

Compare and contrast different types of reinforcement schedules

Central Takeaways

Fundamental Points

• A reinforcement schedule is a tool in operant conditioning that allows the trainer to command the timing and frequency of reinforcement in order to elicit a target behavior.
• Continuous schedules reward a behavior subsequently every performance of the desired behavior; intermittent (or partial) schedules only reward the behavior afterward certain ratios or intervals of responses.
• Intermittent schedules can be either fixed (where reinforcement occurs after a set amount of time or responses) or variable (where reinforcement occurs later on a varied and unpredictable amount of time or responses).
• Intermittent schedules are also described as either interval (based on the time between reinforcements) or ratio (based on the number of responses).
• Unlike schedules (stock-still-interval, variable-interval, fixed-ratio, and variable-ratio) accept different advantages and respond differently to extinction.
• Chemical compound reinforcement schedules combine ii or more simple schedules, using the aforementioned reinforcer and focusing on the same target behavior.

Cardinal Terms

• extinction: When a behavior ceases because it is no longer reinforced.
• interval: A period of time.
• ratio: A number representing a comparison between two things.

A schedule of reinforcement is a tactic used in operant conditioning that influences how an operant response is learned and maintained. Each type of schedule imposes a rule or programme that attempts to determine how and when a desired behavior occurs. Behaviors are encouraged through the utilise of reinforcers, discouraged through the utilise of punishments, and rendered extinct by the consummate removal of a stimulus. Schedules vary from unproblematic ratio- and interval-based schedules to more complicated chemical compound schedules that combine one or more simple strategies to manipulate behavior.

Continuous vs. Intermittent Schedules

Continuous schedules reward a behavior after every performance of the desired behavior. This reinforcement schedule is the quickest way to teach someone a behavior, and it is especially effective in teaching a new behavior. Simple intermittent (sometimes referred to as partial) schedules, on the other hand, only reward the behavior later on certain ratios or intervals of responses.

Types of Intermittent Schedules

There are several different types of intermittent reinforcement schedules. These schedules are described equally either fixed or variable and every bit either interval or ratio.

Stock-still vs. Variable, Ratio vs. Interval

Stock-still refers to when the number of responses between reinforcements, or the amount of fourth dimension between reinforcements, is set and unchanging. Variable refers to when the number of responses or amount of time between reinforcements varies or changes. Interval means the schedule is based on the time between reinforcements, and ratio ways the schedule is based on the number of responses between reinforcements. Simple intermittent schedules are a combination of these terms, creating the post-obit iv types of schedules:

• A fixed-interval schedule is when beliefs is rewarded after a set amount of time. This type of schedule exists in payment systems when someone is paid hourly: no matter how much work that person does in i hour (behavior), they volition be paid the aforementioned amount (reinforcement).
• With a variable-interval schedule, the subject gets the reinforcement based on varying and unpredictable amounts of time. People who like to fish feel this blazon of reinforcement schedule: on average, in the same location, you lot are likely to catch about the same number of fish in a given time menses. However, yous practice not know exactly when those catches will occur (reinforcement) within the time menstruum spent fishing (beliefs).
• With a fixed-ratio schedule, at that place are a set up number of responses that must occur before the behavior is rewarded. This can exist seen in payment for piece of work such as fruit picking: pickers are paid a certain amount (reinforcement) based on the amount they pick (beliefs), which encourages them to pick faster in order to make more coin. In another instance, Carla earns a commission for every pair of glasses she sells at an eyeglass store. The quality of what Carla sells does non matter because her commission is not based on quality; it'southward just based on the number of pairs sold. This distinction in the quality of functioning can assist decide which reinforcement method is near advisable for a particular state of affairs: fixed ratios are better suited to optimize the quantity of output, whereas a fixed interval can lead to a higher quality of output.
• In a variable-ratio schedule, the number of responses needed for a reward varies. This is the nigh powerful type of intermittent reinforcement schedule. In humans, this type of schedule is used by casinos to concenter gamblers: a slot machine pays out an average win ratio—say v to ane—but does non guarantee that every fifth bet (beliefs) will exist rewarded (reinforcement) with a win.

All of these schedules accept dissimilar advantages. In general, ratio schedules consistently elicit higher response rates than interval schedules because of their predictability. For example, if you are a factory worker who gets paid per item that you manufacture, you will be motivated to manufacture these items rapidly and consistently. Variable schedules are categorically less-predictable so they tend to resist extinction and encourage continued behavior. Both gamblers and fishermen alike can understand the feeling that one more pull on the slot-machine lever, or i more hour on the lake, will modify their luck and elicit their respective rewards. Thus, they keep to adventure and fish, regardless of previously unsuccessful feedback.

Elementary reinforcement-schedule responses: The four reinforcement schedules yield different response patterns. The variable-ratio schedule is unpredictable and yields loftier and steady response rates, with niggling if any pause after reinforcement (e.g., gambling). A stock-still-ratio schedule is predictable and produces a high response rate, with a curt intermission later on reinforcement (eastward.yard., eyeglass sales). The variable-interval schedule is unpredictable and produces a moderate, steady response charge per unit (eastward.g., fishing). The fixed-interval schedule yields a scallop-shaped response pattern, reflecting a meaning pause after reinforcement (e.g., hourly employment).

Extinction of a reinforced behavior occurs at some bespeak later on reinforcement stops, and the speed at which this happens depends on the reinforcement schedule. Amidst the reinforcement schedules, variable-ratio is the most resistant to extinction, while fixed-interval is the easiest to extinguish.

Elementary vs. Compound Schedules

All of the examples described higher up are referred to as elementary schedules. Compound schedules combine at least ii elementary schedules and use the same reinforcer for the aforementioned behavior. Compound schedules are often seen in the workplace: for case, if you are paid at an hourly rate (stock-still-interval) simply likewise have an incentive to receive a small commission for certain sales (fixed-ratio), y'all are being reinforced by a chemical compound schedule. Additionally, if there is an terminate-of-yr bonus given to only three employees based on a lottery system, you'd be motivated by a variable schedule.

At that place are many possibilities for compound schedules: for instance, superimposed schedules use at least ii unproblematic schedules simultaneously. Concurrent schedules, on the other hand, provide two possible simple schedules simultaneously, just allow the participant to respond on either schedule at will. All combinations and kinds of reinforcement schedules are intended to elicit a specific target behavior.

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Source: https://courses.lumenlearning.com/boundless-psychology/chapter/operant-conditioning/

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