Which of the following describes actions that increase the likelihood of a behavior being repeated?

The correct answer is positive reinforcers. Positive reinforcement refers to the process of strengthening a behavior by providing a desirable consequence after the behavior occurs. When a behavior is followed by a pleasant outcome, it becomes more likely that the behavior will be repeated in the future. For example, if a student receives praise or a reward for completing their homework on time, they are more likely to continue completing their homework promptly.

Negative reinforcers also increase the likelihood of a behavior being repeated, but they do so by removing an unpleasant stimulus. This is different from positive reinforcement, which adds something desirable. Neutral stimuli do not affect the likelihood of a behavior being repeated, as they do not have either reinforcing or punishing qualities. Conditioned stimuli can be associated with unconditioned stimuli in classical conditioning scenarios but do not directly lead to the repetition of behaviors in the same way that reinforcers do. Therefore, positive reinforcers are the most accurate choice since they are specifically associated with increasing the likelihood of behavior repetition through positive outcomes.