 Habituation is a decrease in responsiveness at the repeated presentation of a particular stimulus. Historically speaking, it is referred to in a respondent conditioning perspective, right? Meaning that you don't react to a particular stimulus anymore such as a loud noise, it doesn't cause a startle response, it doesn't annoy you and those types of things. However, there is some sound evidence from Dr. McSweeney that indicates that habituation can occur to reinforcers and happens within an operant setting. So, as you can see, I have plenty of small children at home. I've taught lots of college classes where people make freaking noises at me all the time and it has no bearing or effect on my behavior whatsoever. Habituation. I've habituated to the noises that you hear in the background. Actually, I've habituated to all fucking noise, but I just tune it all out. That's the way it goes.