Registered Behavior Technician (RBT) Practice Exam 2025 - Free RBT Practice Questions and Study Guide

The main purpose of reinforcement in Applied Behavior Analysis (ABA) is to increase the likelihood of a desired behavior occurring again. Reinforcement works by providing a consequence that strengthens a behavior, making it more probable that the behavior will be repeated in the future. When a behavior is followed by a rewarding stimulus or experience, it encourages the individual to engage in that behavior again.

Positive reinforcement involves adding a desirable consequence after the desired behavior, while negative reinforcement involves removing an aversive stimulus, which also encourages the behavior. In both cases, the focus is on increasing behavior rather than eliminating or decreasing it.

The other options reflect misunderstandings of reinforcement. Punishment, as mentioned in one choice, is aimed at reducing undesirable behaviors, not increasing desired ones. Decreasing frequency is contrary to the concept of reinforcement, which seeks to boost likelihood. Lastly, while reinforcement can help establish new behaviors, its primary role is in increasing the frequency of behaviors that are already present, rather than creating behaviors from scratch.