Psych Terms- Stimulus Control

Stimulus Control

The term we are going to talk about today is a pretty important one; Stimulus Control. It’s a term used in behavioral psychology (behaviorism) to describe the relationship between an antecedent stimulus (setting, etc), and the control (or altering effect) it has over the behavior that follows it.  Another way to phrase it is, stimulus control is a phenomenon that occurs when an organism behaves one way in the presence of a stimulus, and differently when it is not present. [2]

The stimulus itself in this situation is called the discriminative stimulus (sometimes written as SD ). A discriminative stimulus is a stimulus in which a prior behavior had undergone either reinforcement (strengthening its future use) or punishment (weakening its future use) in the past, leading to how that behavior is adaptively used in a condition (stimulus) that is similar to it in the future. We are describing what factors have a controlling effect on behavior, due to their history. [1,2]

So, in the presence of this discriminative stimulus, a behavior might exhibit changes in frequency, duration, amplitude or intensity, and how quickly or slowly it occurs following that discriminative stimulus.  [1,2]

Let’s look at some examples:


Let’s say the discriminative stimulus is an itch. The person has a history of relieving that itch successfully by scratching it. So, what behavior (response) comes under stimulus control of the itch? Scratching. In the presence of the itch, the scratching behavior is likely to occur. That, is stimulus control.


How about this one? It’s now 7 PM on a Thursday. In the past, at 7 PM on Thursdays, a favorite show comes on television. What behavior (response) might come under stimulus control of that discriminative stimulus (the favorite show being on)? There might be a few, or a chain, you could say;  sitting down, turning on the TV, flipping to the channel. All of these behaviors are under the stimulus control of it being 7 PM on a Thursday, and having been reinforced (rewarded) in the past.

How many conditions can you think of that would show this relation? Plenty, right?

Countless behaviors fall under stimulus control. That’s what makes it such a fascinating  topic and definition.


Questions, Comments? Leave them below!


1.Baum, William M. (2005). Understanding behaviorism : Behavior, culture, and evolution

2. Cooper, J. O., Heron, T. E., & Heward, W. L. (1987). Applied behavior analysis. Columbus: Merrill Pub. Co.

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It’s been a while. What’s to come.

Hey readers, thanks for sticking around. As you may have realized my publications have dropped since my first one. Some, I took down to revise. Others never made it to the pages since work and research overwhelmed my daily schedule.

I’ve come back with some better understanding on some topics, some of my own behavioral research, research reviews from stuff you may not be able to see behind the paywalls of academia, and other analysis of data sources that may provide some fun to relate to behavior analysis and more.

So, topics you can expect to see soon.

  1. The Four Big Functions of Behavior- Escape, Attention, Stimulation , and Access- What the research says and real world examples.
  2.  Winning and Losing- What people tend to do after both.
  3. Patterns of Behavior- How you can track your own behavior in ways that matter.

Thanks all! Reach out with any ideas you’d like to see at