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Updated: Apr 15, 2026

Three Laboratory Procedures for Assessing Different Manifestations of Impulsivity in Rats

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Published on: March 17, 2019

Rapid-response impulsivity: definitions, measurement issues, and clinical implications.

Kristen R Hamilton¹, Andrew K Littlefield², Noelle C Anastasio³

¹Department of Psychology, Maryland Neuroimaging Center, Center for Addictions, Personality, and Emotion Research, University of Maryland.

Personality Disorders

|April 14, 2015

Summary

Impulsivity research needs clearer definitions and consistent assessment. Experts recommend using specific tasks measuring refraining from action initiation (RAI) and stopping an ongoing action (SOA) for better understanding rapid-response impulsivity (RRI).

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Area of Science:

Psychiatry
Neuroscience
Psychology

Background:

Impulsivity is central to psychiatric and personality disorders.
Lack of precise definitions and consistent assessment hinders progress in understanding and treating impulsivity.
Rapid-response impulsivity (RRI) involves immediate action with diminished forethought.

Purpose of the Study:

To evaluate reliability, sensitivity, and validity of RRI measures.
To guide researchers and clinicians in selecting and interpreting RRI measures.
To establish recommendations for RRI research and clinical practice.

Main Methods:

Experts from the International Society for Research on Impulsivity (InSRI) convened to discuss RRI measures.
Reviewed commonly used clinical and preclinical RRI tasks.
Differentiated RRI into two types: refraining from action initiation (RAI) and stopping an ongoing action (SOA).

Main Results:

RRI measures vary in reliability, sensitivity, and validity.
RAI and SOA tasks capture distinct aspects of RRI.
These distinct aspects may correlate with different clinical outcomes.

Conclusions:

Selection of RRI measures requires careful consideration of strengths, limitations, and practicalities.
Researchers should utilize both RAI and SOA tasks to compare RRI types and their clinical associations.
Harmonizing preclinical and clinical research by applying similar considerations is recommended.