Applied Behavior Analysis Technician (ABAT) Practice Test

What is a 'Stimulus'?

1. A physical shape of behavior

2. An energy change affecting an organism

3. A specific behavior instance

4. A group of responses

The correct answer is: An energy change affecting an organism

A 'stimulus' refers to an energy change that affects an organism, and this is the correct interpretation of the term within the context of behavior analysis. In behavioral science, a stimulus is anything in the environment that can provoke a response or reaction from an organism. This can include a wide range of phenomena such as visual, auditory, tactile, or olfactory changes that an individual can perceive and respond to. Understanding stimuli is crucial for analyzing behavior as it highlights the context in which behavior occurs and how individuals interact with their environment. The other options do not accurately capture the essence of what a stimulus is. For instance, while a physical shape of behavior or a specific behavior instance might relate to observable actions, they do not define the provocational aspect of stimuli that elicits responses. Similarly, grouping responses does not encapsulate the fundamental nature of stimuli as energy changes that can instigate responses, which is the core concept in the study of behavior. Thus, recognizing a stimulus as an energy change impacting an organism is essential for understanding how behaviors are formed and modified.