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Updated: Jan 4, 2026

The Successive Alleys Test of Anxiety in Mice and Rats
Published on: June 17, 2013
A Standardized Anxiety Quotient in Elevated Open Platform Task Quantifies Rodent Anxiogenic Tendency with Improved
William Z Suo1, David W Peng2, Prabhakar Singh3
1Laboratory for Alzheimer's Disease & Aging Research, Veterans Affairs Medical Center, Kansas City, MO 64128, USA; Department of Neurology, University of Kansas Medical Center, Kansas City, KS 66170, USA; Department of Molecular & Integrative Physiology, University of Kansas Medical Center, Kansas City, KS 66170, USA; University of Kansas Alzheimer's Disease Center (KU ADC), Kansas City, KS 66170, USA.
This study introduces a new method for assessing rodent anxiety using peak tolerance of fear (PTF) or anxiety quotient (AQ). This novel parameter significantly improves the reliability and sensitivity of behavioral assessments in animal research.
Area of Science:
- Neuroscience
- Animal Behavior
- Pharmacology
Background:
- Reliable animal behavioral assessment is crucial for translating in vitro findings to in vivo studies.
- Current methods for rodent anxiety assessment exhibit significant data dispersion, limiting their translational value.
Purpose of the Study:
- To develop a novel, more sensitive, and reliable parameter for measuring anxiogenic tendency in rodents.
- To improve the methodology for rodent anxiety assessment in behavioral studies.
Main Methods:
- A data transformation process was applied to the elevated open platform task.
- A new parameter, peak tolerance of fear (PTF) or anxiety quotient (AQ), was generated.
Main Results:
- PTF/AQ demonstrated significantly reduced data dispersion compared to traditional parameters (travel distance, time, entries).
- This reduction in dispersion was observed within groups, across studies, and across cohorts.
- The novel parameter offers enhanced reliability for rodent anxiety assessment.
Conclusions:
- The peak tolerance of fear (PTF) or anxiety quotient (AQ) parameter represents a significant methodological improvement.
- This enhanced rodent anxiety assessment can improve the translation of in vitro findings to in vivo research.

