Says that behavior that is rewarded will increase, while behavior that is punished will decrease.

Positive reinforcement occurs when a certain behavior results in a positive outcome, making the behavior likely to be repeated in the future. This behavioral psychology concept can be used to teach and strengthen behaviors.

This article discusses how positive reinforcement works and how it can be used to teach or modify behaviors. It also covers how positive reinforcement compares to negative reinforcement and how it is best applied.

In operant conditioning, positive reinforcement involves the addition of a reinforcing stimulus following a behavior that makes it more likely that the behavior will occur again in the future. When a favorable outcome, event, or reward occurs after an action, that particular response or behavior will be strengthened.

One of the easiest ways to remember positive reinforcement is to think of it as something being added. By thinking of it in these terms, you may find it easier to identify real-world examples of positive reinforcement.

Sometimes positive reinforcement occurs quite naturally. For example, when you hold the door open for someone, you might receive praise and a thank you. That affirmation serves as positive reinforcement and may make it more likely that you will hold the door open for people again in the future.

In other cases, someone might choose to use positive reinforcement very deliberately in order to train and maintain a specific behavior. An animal trainer, for example, might reward a dog with a treat after the animal shakes the trainer's hand and pauses for a count of five. 

Operant conditioning was introduced by the psychologist B. F. Skinner, who based the idea on Thorndike's law of effect. The basic idea behind the law of effect is that the consequences of behavior determine whether that behavior happens again. Reinforced behaviors become strengthened, while punished behaviors are weakened.

The four types of reinforcement/punishment are:

  • Positive reinforcement is the addition of a positive outcome to strengthen behavior.
  • Negative reinforcement is the removal of a negative outcome to strengthen a behavior.
  • Positive punishment involves taking away a desired stimulus to weaken a behavior.
  • Negative punishment involves applying an undesirable stimulus to weaken a behavior.

There are many examples of positive reinforcement in action. Consider the following scenarios:

  • Praise: After you execute a turn during a skiing lesson, your instructor shouts out, "Great job!"
  • Monetary rewards: At work, you exceed this month's sales quota, so your boss gives you a bonus.
  • Other rewards: For your psychology class, you watch a video about the human brain and write a paper about what you learned. Your instructor gives you 20 extra credit points for your work.

In each situation, the reinforcement is an additional stimulus occurring after the behavior that increases the likelihood that the behavior will occur again in the future.

There are many different types of reinforcers that can be used to increase behaviors, but it is important to note that the type of reinforcer used depends on the individual and the situation.

  • Natural reinforcers occur directly as a result of the behavior. For example, a student studies hard, pays attention in class, and does their homework. As a result, they get excellent grades.
  • Social reinforcers involve expressing approval of a behavior, such as a teacher, parent, or employer saying or writing, "Good job" or "Excellent work."
  • Tangible reinforcers involve presenting actual, physical rewards such as candy, treats, toys, money, and other desired objects. While these types of rewards can be powerfully motivating, they should be used sparingly and with caution.
  • Token reinforcers are points or tokens that are awarded for performing certain actions. These tokens can then be exchanged for something of value.

While gold stars and tokens might be very effective reinforcement for a second-grader, they are not going to have the same effect on a high school or college student.

For positive reinforcement to be effective, it needs to involve a reward that the individual wants or needs.

The goal of both positive and negative reinforcement is to increase the likelihood that a behavior will occur again in the future. The difference is in how each accomplishes this.

Positive reinforcement adds something to strengthen behavior, while negative reinforcement removes something.

For example, allowing a child to play on their tablet if they finish their homework is an example of positive reinforcement. Negative reinforcement would be a child finishing their homework to avoid having their tablet taken away.

When used correctly, positive reinforcement can be very effective. It can be used in various settings to make desired changes to behavior or teach new behaviors.

  • At home: Parents can use positive reinforcement to encourage kids to engage in all kinds of positive, desirable behavior. For example, a parent might use praise or other rewards to get a child to brush their teeth, get ready for bed, or clean up their room.
  • In school: Teachers can also use positive reinforcement to help kids engage in desired classroom behavior. An example of positive reinforcement in the classroom would be praising a child for raising their hand or giving them a sticker on their reward chart for turning their homework in on time.
  • In therapy settings: Therapists also use positive reinforcement to help teach new behaviors and coping skills. For example, positive reinforcement is commonly used as part of behavior modification, an intervention that focuses on reducing or eliminating maladaptive behaviors.

While different strategies can be used depending on the situation, some experts suggest that positive reinforcement should be used more often than negative reinforcement or punishment.

Positive reinforcement can be a useful learning tool in a wide variety of settings. There are things that you can do to make sure that it is used effectively.

Positive reinforcement is most effective when it occurs immediately after the behavior. Reinforcement should be presented enthusiastically and should occur frequently.

  • Deliver reinforcement quickly. A shorter time between a behavior and positive reinforcement makes a stronger connection.
  • Waiting risks reinforcing the wrong behaviors. The longer the time, the more likely an intervening behavior might accidentally be reinforced.

In addition to the timing and type of reinforcement used, the presentation schedule can also play a role in the strength of the response. Schedules of reinforcement can have a powerful influence on how strong a response is and how often it occurs.

When you are first teaching a new behavior, you would likely use a continuous reinforcement schedule where you deliver positive reinforcement every single time the behavior occurs. Once the response is established, you would then switch to an intermittent or ratio schedule.

An important thing to note is that positive reinforcement is not always good. Positive reinforcement can also strengthen undesirable behaviors. For example, when a child misbehaves in a store, some parents might give them extra attention or even buy them a toy in an effort to stop the behavior.

Children quickly learn that by acting out, they can gain attention from their parents or even acquire objects they want. Essentially, parents are reinforcing the misbehavior.

A better solution would be to use positive reinforcement when the child is displaying good behavior. Instead of rewarding the misbehavior, the parents would want to wait until the child behaves well and then reward that good behavior with praise, treats, or even a toy.

Positive reinforcement can be an effective learning tool when used appropriately. Sometimes this type of learning occurs naturally through normal interactions with the environment.

In other cases, parents, teachers, and therapists can use this behavioral technique to help teach new behaviors. When using positive reinforcement, it's important to be thoughtful about the type of reinforcers and the schedule that you use to train the new behavior.