Adaptive Staircase Method
Adaptive Staircase Method - Related Videos
06:48
The Staircase Procedure for Finding a Perceptual Threshold
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2023
Source: Laboratory of Jonathan Flombaum—Johns Hopkins University Psychophysics is the name for a set of methods in perceptual psychology designed in order to relate the actual intensity of stimuli to their perceptual intensity. One important aspect of psychophysics involves the measurement of perceptual thresholds: How bright does a light need to be for a person to be able to detect it? How little pressure applied to the skin is detectable? How soft can a sound be and still be heard? Put...
02:39
Staircase Test for Motor Function Assessment in a Hemiparkinsonian Rat
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2025
This video demonstrates the staircase test to assess motor function in a hemiparkinsonian rat with a right brain lesion. The lesion disrupts dopamine signaling, impairing left paw control, which results in more pellets remaining on the left stairs, indicating motor dysfunction.
07:14
A Novel Approach to Assess Motor Outcome of Deep Brain Stimulation Effects in the Hemiparkinsonian Rat: Staircase and Cylinder Test
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Cited by 7 •
2016
Deep brain stimulation (DBS) is an effective treatment option for Parkinson's disease. We established a study design to screen novel stimulation paradigms in rats. The protocol describes the use of the staircase test and cylinder test for motor outcome assessment in DBS treated hemiparkinsonian rats.
08:35
A Simple and Inexpensive Method for Determining Cold Sensitivity and Adaptation in Mice
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Cited by 30 •
2015
The Cold Plantar Assay (CPA) measures cold responsiveness between 30 °C and 5 °C, and can also measure cold adaptation. This protocol describes how to use the CPA to measure cold hypersensitivity, analgesia, and adaptation in mice.
07:14
A Method to Study Adaptation to Left-Right Reversed Audition
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2018
The present study proposes a protocol to investigate the adaptation to left-right reversed audition achieved only by wearable devices, using neuroimaging, which can be an effective tool for uncovering the adaptability of humans to a novel environment in the auditory domain.
FAQs
The response rule links each new stimulus level to the participant’s immediately preceding performance. A correct detection or other specified response leads to a lower intensity, whereas an incorrect response leads to a higher one. Repeated adjustments make the stimulus sequence concentrate around the level at which the participant’s responses change, providing an individualized threshold estimate.
Instead of presenting many predetermined intensity levels, the method directs testing toward levels informed by the participant’s responses. Stimuli that are clearly detected or missed need less repeated evaluation, so more trials are spent near the relevant response boundary. This focused sampling improves measurement efficiency while preserving information about individual perceptual sensitivity.
Fixed-intensity testing presents selected levels regardless of what the participant has just reported, while an adaptive staircase changes intensity in response to performance. The adaptive approach therefore follows the participant’s observed sensitivity rather than applying an identical sequence to everyone. In medical research, that distinction can reduce unnecessary trials and better capture patient-to-patient differences.
Testing begins by presenting a stimulus and recording whether the participant makes the required response. The next presentation is then adjusted according to that response: intensity decreases after a correct detection or specified response and increases after an incorrect response. Continuing this sequence produces response-dependent measurements that can be analyzed to estimate the participant’s threshold.
The sequence provides a quantitative estimate of an individual’s perceptual threshold rather than only indicating whether one selected intensity was detected. Because the estimate is based on responses across changing stimulus levels, it can support comparisons among participants or across repeated assessments. Those comparisons may reveal differences in sensory sensitivity or changes associated with disease.
Medical applications include quantitative assessment of hearing, vision, sensory sensitivity, and pain perception. Researchers can use the resulting threshold estimates to characterize patient differences, follow disease-related changes, or evaluate treatment effects. Its adaptive structure is especially relevant when testing perceptual responses would otherwise require numerous fixed-intensity trials, because it concentrates measurement near each participant’s response threshold.