The feasibility of establishing new color image scales using the magnitude estimation method

2007 ◽  
Vol 32 (6) ◽  
pp. 463-468 ◽  
Author(s):  
Wen-Guey Kuo
Keyword(s):  
Magnitude Estimation ◽  
Color Image ◽  
Estimation Method ◽  
Magnitude Estimation Method

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

scholarly journals Psychophysical evaluation of the descriptors of pain in the postoperative

2007 ◽  
Vol 15 (3) ◽  
pp. 474-479 ◽  
Author(s):  
Lilian Varanda Pereira ◽  
Fátima Aparecida Emm Faleiros Sousa
Keyword(s):  
Experimental Study ◽  
Magnitude Estimation ◽  
Estimation Method ◽  
Adequate Level ◽  
High Magnitude ◽  
Post Operative Pain ◽  
Psychophysical Evaluation ◽  
Magnitude Estimation Method

This experimental study aimed to evaluate 20 descriptors of the post-operative pain considering the adequate level of each in describing it. A total of 48 post-operated patients, age between 14 and 70 years old, 60.4% male, participated in the experiment. They judged the descriptors through the Magnitude Estimation Method aiming to qualify and select those with the highest and lowest frequency of attributions in the description of the post-operative pain. The results showed that among the descriptors evaluated, terrible, strong, unbearable, intense and violent were the most frequently ones, whereas the least frequently attributed descriptors were: colossal, smashing, fulminating, blinding and lacerating. The results showed that the most frequently attributed descriptors in the description of post-operative pain are those that represent high magnitude of pain.

Effect of aging on respiratory sensations produced by elastic loads

1981 ◽  
Vol 50 (4) ◽  
pp. 844-850 ◽  
Author(s):  
M. Tack ◽  
M. D. Altose ◽  
N. S. Cherniack
Keyword(s):  
Magnitude Estimation ◽  
Healthy Subjects ◽  
Estimation Method ◽  
Line Length ◽  
Respiratory Sensation ◽  
Matching Test ◽  
Elastic Loading ◽  
The Cross ◽  
Magnitude Estimation Method

We compared the effects of graded elastic loads on respiratory sensations in 19 healthy subjects greater than 60 yr of age to 21 healthy subjects less than 30 yr old. The magnitude of the respiratory sensation was quantitated by two well-established psychophysical techniques. In the magnitude-estimation method, subjects indicated the intensity of the sensation experienced with numbers; in the cross-modality method, the level of sensation was signaled with a dynamometer activated by thumb pressure. In addition, the effects of nonrespiratory stimuli were compared in the two groups. With both methods, the logarithm of the response to elastic loads was linearly related to the logarithms of the stimulus. The slope of the line relating the log of the response to the log of the stimulus (beta) was significantly greater in the younger group than in the older group using the magnitude-estimation method but not with the cross-modality matching test. There were no differences in the ability of the two groups to assign numbers to line length. However, the older group had a lower beta for magnitude estimation of thumb force than the younger group. The results suggest 1) that respiratory sensation follows Steven's law and grows exponentially with the stimulus; 2) that the growth of sensations produced by elastic loading is less in older than in younger individuals; and 3) differences in the perception of the mode used for matching in the cross-modality test may obscure significant differences in the sensations elicited by respiratory stimuli.

Sign in / Sign up

Export Citation Format

Share Document