Staircase Procedure
Staircase Procedure - 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.
07:28
Evolution of Staircase Structures in Diffusive Convection
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Cited by 1 •
2018
Diffusive convection (DC) widely occurs in natural processes and engineering applications, characterized by a series of staircases with homogeneous convecting layers and stratified interfaces. An experimental procedure is described to simulate the evolution process of the DC staircase structure, including the generation, development and disappearance, in a rectangular tank.
11:01
SSVEP-based Experimental Procedure for Brain-Robot Interaction with Humanoid Robots
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Cited by 12 •
2015
The overall goal of this method is to establish an SSVEP-based experimental procedure by integrating multiple software programs to enable the study of brain-robot interaction with humanoid robots, which is prospective in assisting the sick and elderly as well as performing unsanitary or dangerous jobs.
FAQs
Each response determines the direction of the next stimulus adjustment. A correct response generally makes the task more difficult, whereas an incorrect response makes it easier. Repeated adjustments move testing toward the participant’s changing point of performance, rather than spending many trials at intensities that are clearly too easy or too difficult.
Reversals mark points where the sequence changes direction, such as moving from harder to easier stimuli or the reverse. Because these points cluster around the performance level of interest, researchers analyze them to estimate a threshold. Their pattern also shows how the procedure samples behavior near the point where responses begin to change.
A Staircase Procedure concentrates trials around the participant’s current performance boundary, while fixed-intensity testing does not adapt stimulus difficulty after each response. This adaptive focus can estimate a threshold with fewer trials and reduce unnecessary exposure to conditions that produce consistently easy or difficult responses, helping limit participant burden.
Researchers present a stimulus, record whether the participant responds correctly, and adjust the difficulty for the next trial according to that response. They continue this sequence so the stimulus level moves through successive reversals. Finally, they analyze the reversals to estimate the perceptual or behavioral threshold relevant to the task.
Reversal data provide an estimate of the stimulus level associated with the participant’s threshold, meaning the performance level where behavior changes most strongly. This information can characterize perceptual discrimination or detection and can also be used to examine behavioral performance in learning and decision-making tasks.
The method is useful when researchers need to measure a threshold during sensory discrimination or detection tasks, or when they want to track behavior relevant to learning and decision-making. Its adaptive structure keeps testing near the most informative performance range, which can make studies more efficient while helping control participant burden.