A Psychophysical Study of Apparent Rarefaction

Perception ◽  
1980 ◽  
Vol 9 (5) ◽  
pp. 533-536 ◽  
Author(s):  
Sergio Cesare Masin
Keyword(s):  
Magnitude Estimation ◽  
Psychophysical Function ◽  
Estimation Method ◽  
Magnitude Estimation Method ◽  
Psychophysical Study

Five psychophysical functions for visual density are obtained with the use of the magnitude-estimation method. Because of apparent rarefaction, a different psychophysical function ensues for each size of square used. It is found that apparent rarefaction is barely detectable for sides longer than 10–15 cm (6–9 deg). It is also found that apparent rarefaction occurs to the greatest extent when short interlinear spacings are used.

Null Effect of Intramodal Stimulus-Range Variation on the Exponent for Numerousness

1983 ◽  
Vol 56 (3) ◽  
pp. 851-855 ◽  
Author(s):  
S. C. Masin
Keyword(s):  
Magnitude Estimation ◽  
Psychophysical Function ◽  
Estimation Method ◽  
Stimulus Range ◽  
Range Effect ◽  
Null Effect ◽  
Straight Line ◽  
Magnitude Estimation Method ◽  
Range Variation

The psychophysical function for numerousness was determined by the magnitude estimation method with no designated standard and no assigned modulus, using nine ranges of the stimuli. Numerousness is a peculiar continuum for which the form of the psychophysical function is independent of the range (null range effect). Moreover, the psychophysical function was shown to be a straight line.

Accumulation of Corresponding Colours Under Extreme Chromatic Illuminations and modification of CAM16

2021 ◽  
Vol 2021 (29) ◽  
pp. 368-373
Author(s):  
Yuechen Zhu ◽  
Ming Ronnier Luo
Keyword(s):  
Magnitude Estimation ◽  
Estimation Method ◽  
Prediction Performance ◽  
Chromatic Adaptation ◽  
Good Prediction ◽  
Lighting Conditions ◽  
Good Prediction Performance ◽  
The Matrix ◽  
D Values ◽  
Magnitude Estimation Method

The goal of this study was to investigate the chromatic adaptation under extreme chromatic lighting conditions using the magnitude estimation method. The locations of the lightings on CIE1976 u′v′ plane were close to the spectrum locus, so the colour purity was far beyond the previous studies, and the data could test the limitations of the existing models. Two psychophysical experiments were carried out, and 1,470 estimations of corresponding colours were accumulated. The results showed that CAT16 gave a good prediction performance for all the chromatic lightings except for blue lighting, and the degree of adaptation was relatively high, that is, D was close to 1. The prediction for blue lightings was modified, the results showed the performance of CAM16 could be improved by correcting the matrix instead of the D values.

scholarly journals Pain from the life cycle perspective: Evaluation and Measurement through psychophysical methods of category estimation and magnitude estimation

2016 ◽  
Vol 24 (0) ◽  
Author(s):  
Fátima Aparecida Emm Faleiros Sousa ◽  
Talita de Cássia Raminelli da Silva ◽  
Hilze Benigno de Oliveira Moura Siqueira ◽  
Simone Saltareli ◽  
Rodrigo Ramon Falconi Gomez ◽  
...  
Keyword(s):  
Chronic Pain ◽  
Life Cycle ◽  
Magnitude Estimation ◽  
Acute Pain ◽  
Estimation Method ◽  
Pain Evaluation ◽  
Life Cycle Perspective ◽  
Category Estimation ◽  
Magnitude Estimation Method ◽  
Reliable Scale

Abstract Objective: to describe acute and chronic pain from the perspective of the life cycle. Methods: participants: 861 people in pain. The Multidimensional Pain Evaluation Scale (MPES) was used. Results: in the category estimation method the highest descriptors of chronic pain for children/ adolescents were "Annoying" and for adults "Uncomfortable". The highest descriptors of acute pain for children/adolescents was "Complicated"; and for adults was "Unbearable". In magnitude estimation method, the highest descriptors of chronic pain was "Desperate" and for descriptors of acute pain was "Terrible". Conclusions: the MPES is a reliable scale it can be applied during different stages of development.

scholarly journals Visual and instrumental correlation of sparkle by the magnitude estimation method

2016 ◽  
Vol 55 (23) ◽  
pp. 6458 ◽  
Author(s):  
Omar Gómez ◽  
Esther Perales ◽  
Elísabet Chorro ◽  
Valentín Viqueira ◽  
Francisco M. Martínez-Verdú
Keyword(s):  
Magnitude Estimation ◽  
Estimation Method ◽  
Magnitude Estimation Method
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