Related Experiment Video
Updated: Jun 6, 2026

Operant Procedures for Assessing Behavioral Flexibility in Rats
Published on: February 15, 2015
It is Time to Retire "Noncontingent Reinforcement"
Mary Max Llinás1, Thomas R Freeman2, Elbert Blakely1
1School of Behavior Analysis, Florida Institute of Technology, Melbourne, FL USA.
None:
The term "noncontingent reinforcement (NCR)" has long been used in both research and clinical practice. However, several authors have recognized it as a conceptually flawed term in the scholarly literature (e.g., Poling & Normand, 1999). Nonetheless, behavior analysts have continued to use this term, and there are several concerns surrounding its usage in addition to the conceptual reasons previously reported. At present, "NCR" is serving as an umbrella term for several response-independent (e.g., time-based schedules, continuous access), response-dependent (e.g., change in dependency), and other procedures with preexisting labels (e.g., mand training, pairing). With "NCR" being used to describe a wide array of distinct procedures, it can lead to confusion and imprecise communication. Therefore, the purpose of this article is to provide a brief history of "NCR," describe procedures commonly labelled as "NCR," explore some of the attendant terminological issues in relation to the mechanisms of action, and summarize arguments from the literature for keeping or removing "NCR" from our lexicon. We will then propose an umbrella term (i.e., response-independent schedules) for these common procedures and suggest a series of actions to resolve this ongoing problem in our terminology.
Related Concept Videos
Operant Conditioning
Reinforcement in operant conditioning can be positive or negative, both of which serve to increase the likelihood of a behavior. Positive...
Reinforcement Schedules
Once a behavior is learned,...
Generalization, Discrimination, and Extinction
Generalization occurs when a behavior reinforced in one context is performed in similar situations. For instance, a student who studies diligently for calculus and receives excellent grades might apply the same study habits to psychology and history, expecting similar results. Generalization shows how learning in one setting can influence behavior in...
Operant Conditioning Intervention
In operant conditioning, behaviors that are...
Reinforcement
Positive reinforcement occurs when a behavior is followed by the presentation of a rewarding stimulus, increasing the frequency of that behavior. For example:
Timing and Consequences on Behavior
Humans, however, can respond to delayed reinforcers. We often make decisions between immediate small rewards and delayed larger rewards. This ability to delay gratification is a significant factor...
