On the Independence of Successive Responses in the Quantal Psychophysical Method

1955 ◽  
Vol 68 (1) ◽  
pp. 145 ◽  
Author(s):  
James F. Jerger
Keyword(s):  
Psychophysical Method

A Response-Time Approach for Estimating Sensitivity to Auditory Tempo Changes

2005 ◽  
Vol 22 (3) ◽  
pp. 389-399 ◽  
Author(s):  
Marc Pouliot ◽  
Simon Grondin
Keyword(s):  
Response Time ◽  
Auditory System ◽  
Relative Sensitivity ◽  
Psychophysical Method ◽  
Dynamic Stimuli ◽  
Tempo Change ◽  
Sensitive Tool ◽  
Acceleration And Deceleration ◽  
Musical Condition ◽  
Method Of Constant Stimuli

One of the features of the auditory system is its ability to efficiently process events that occur in rapid succession. The aim of the present study is to propose a new way of investigating sensitivity to auditory tempo changes. More specifically, it proposes to compare the relative sensitivity (bias) to acceleration and deceleration in both musical and monotonal conditions. Bias was measured with (1) a conventional psychophysical method known as the method of constant stimuli (MCS) and (2) a so-called method of dynamic stimuli (MDS). The latter method consists in responding with a finger press as soon as a near-continual tempo change is detected. With the MCS, there was no preference, as estimated by the point of subjective equality, between acceleration and deceleration in the monotonal condition, but there was a preference in the musical condition that indicated more facility for estimating decelerations than accelerations. The results obtained with the MDS are consistent with the MCS results, given that the response time was faster for decelerations than accelerations in the musical condition but not in the monotonal condition. We conclude that the MDS is a sensitive tool for investigating slight tempo variations.

scholarly journals Developing a comparative scale of different nociceptive and neuropathic pain through two psychophysical methods

2009 ◽  
Vol 17 (2) ◽  
pp. 207-214 ◽  
Author(s):  
Priscilla Hortense ◽  
Fátima Aparecida Emm Faleiros Sousa
Keyword(s):  
Myocardial Infarction ◽  
Neuropathic Pain ◽  
Cancer Pain ◽  
Renal Colic ◽  
Burn Injury ◽  
Labor Pain ◽  
Outpatient Clinics ◽  
Psychophysical Method ◽  
Different Types ◽  
Category Estimation

The general aim of this study was to create a comparative scale of different types of pain through different psychophysical methods and different samples. The psychophysical methods used were magnitude estimation and category estimation. The participants were 30 patients from different outpatient clinics, 30 physicians and 30 nurses. The results were: 1) cancer pain, myocardial infarction pain, renal colic, burn-injury pain, and labor pain were considered more intense, regardless of the psychophysical method used or sample studied; 2) The ranking of different pain intensities, comparing the different psychophysical methods used, resulted in significant agreement levels with Kendal values close to 1.00; 3) There were divergences in the perception of the intensities of some types of pain. These divergences were especially observed between professionals and patients.

Effect of Psychophysical Method on Measurement of the Müller-Lyer Illusion

1984 ◽  
Vol 58 (3) ◽  
pp. 822-822 ◽  
Author(s):  
Stuart J. Mc Kelvie
Keyword(s):  
Psychophysical Method ◽  
Lyer Illusion

Psychophysical method of color reproduction

1992 ◽  
Author(s):  
Shaowei Fu
Keyword(s):  
Psychophysical Method ◽  
Color Reproduction

scholarly journals A Novel Psychophysical Method for Estimating the Time Course of Olfactory Rapid Adaptation in Humans

2010 ◽  
Vol 35 (8) ◽  
pp. 717-725 ◽  
Author(s):  
D. W. Smith ◽  
K. R. Gamble ◽  
T. A. Heil
Keyword(s):  
Time Course ◽  
Psychophysical Method ◽  
Rapid Adaptation

Visual Gap Perception: Judgment Performance at Different Times and the Evaluation of Psychophysical Methods

1978 ◽  
Vol 22 (1) ◽  
pp. 115-115
Author(s):  
Helmut T. Zwahlen
Keyword(s):  
Test Stimulus ◽  
Classical Method ◽  
Standard Stimulus ◽  
Estimation Procedure ◽  
Psychophysical Method ◽  
Computer Simulation Model ◽  
Step Size ◽  
Starting Point ◽  
Stimulus Distance ◽  
The Right

The first part of this study investigated the visual gap judgment performance of twenty-four subjects (21–37 years old) in the laboratory. A scaled down (1:12) two-dimensional gap display (black on yellow background) representing the front silhouette of a car and a post placed on the right side of the car was viewed by the subjects from a distance of 46 inches (total viewing angle of display 17 degrees). The width of the car represented the standard stimulus and the horizontal adjustable distance between the car and the post (gap) represented the test stimulus. The subjects were required to make a forced choice judgment with respect to whether the test stimulus distance (gap) was larger or smaller than the standard stimulus distance (car width). The subjects were tested twice on the same day, once using the randomized classical psychophysical method and once using the Up and Down Transformed Response (U.D.T.R.) rule. The data from the randomized classical psychophysical method was analyzed using the probit and the Kärber method of analysis. The data from the U.D.T.R. method was analyzed using a modified Wetherill estimation procedure. The second part of this study investigated the visual gap judgment performance and eye scanning behavior of two subjects over two days (seven experiments per day). Horizontal eye movements were recorded with a Biometrics Eye Movement Monitor system. The third part of this study investigated the efficacies of two psychophysical methods: The randomized classical method and the sequential U.D.T.R. rule. The results from part one of this study were used to determine a psychometric perception curve of an “average” human being. A digital computer simulation model was built to represent a human being's gap judgment responses and the experimental gap judgment situation. Each method was simulated for the following parameters: the step size between the stimulus levels, the bias of the starting point, and the selected number of trials in an experiment.

scholarly journals Stimuli Characteristics and Psychophysical Requirements for Visual Training in Amblyopia: A Narrative Review

2020 ◽  
Vol 9 (12) ◽  
pp. 3985
Author(s):  
Carlos J. Hernández-Rodríguez ◽  
David P. Piñero ◽  
Ainhoa Molina-Martín ◽  
León Morales-Quezada ◽  
Dolores de Fez ◽  
...  
Keyword(s):  
Perceptual Learning ◽  
Therapeutic Process ◽  
Active Vision ◽  
Neural Mechanisms ◽  
Psychophysical Method ◽  
Visual Training ◽  
Visual Deficits ◽  
Effective Option ◽  
Visual Acuity Loss ◽  
Vision Therapy

Active vision therapy using perceptual learning and/or dichoptic or binocular environments has shown its potential effectiveness in amblyopia, but some doubts remain about the type of stimuli and the mode and sequence of presentation that should be used. A search was performed in PubMed, obtaining 143 articles with information related to the stimuli used in amblyopia rehabilitation, as well as to the neural mechanisms implied in such therapeutic process. Visual deficits in amblyopia and their neural mechanisms associated are revised, including visual acuity loss, contrast sensitivity reduction and stereopsis impairment. Likewise, the most appropriate stimuli according to the literature that should be used for an efficient rehabilitation of the amblyopic eye are described in detail, including optotypes, Gabor’s patches, random-dot stimuli and Vernier’s stimuli. Finally, the properties of these stimuli that can be modified during the visual training are discussed, as well as the psychophysical method of their presentation and the type of environment used (perceptual learning, dichoptic stimulation or virtual reality). Vision therapy using all these revised concepts can be an effective option for treating amblyopia or accelerating the treatment period when combining with patching. It is essential to adapt the stimuli to the patient’s individual features in both monocular and binocular training.

Spatial contrast sensitivity: effects of age, test–retest, and psychophysical method

1988 ◽  
Vol 5 (12) ◽  
pp. 2173 ◽  
Author(s):  
Kent E. Higgins ◽  
Myles J. Jaffe ◽  
Rafael C. Caruso ◽  
Francisco M. deMonasterio
Keyword(s):  
Contrast Sensitivity ◽  
Psychophysical Method ◽  
Spatial Contrast Sensitivity
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