A Switching Observer for Human Perceptual Estimation

2018 ◽  
Author(s):  
Steeve Laquitaine ◽  
Justin Gardner
Keyword(s):  
Perceptual Estimation

EFFECTS OF EXERCISE ON PERCEPTUAL ESTIMATION AND SHORT-TERM RECALL OF SHOOTING PERFORMANCE IN A BIATHLON

2003 ◽  
Vol 97 (7) ◽  
pp. 1107
Author(s):  
CHRISTELLE GREBOT
Keyword(s):  
Short Term ◽  
Perceptual Estimation

Modeling the effects of extraneous sounds on the perceptual estimation of first-formant frequency in vowels

1991 ◽  
Vol 89 (6) ◽  
pp. 2933-2951 ◽  
Author(s):  
Brian Roberts ◽  
Brian C. J. Moore
Keyword(s):  
Formant Frequency ◽  
Perceptual Estimation

Effects of Exercise on Perceptual Estimation and Short-Term Recall of Shooting Performance in a Biathlon

2003 ◽  
Vol 97 (3_suppl) ◽  
pp. 1107-1114 ◽  
Author(s):  
Christelle Grebot ◽  
Alain Groslambert ◽  
Jean-Noel Pernin ◽  
Alain Burtheret ◽  
Jean-Denis Rouillon
Keyword(s):  
Short Term ◽  
Perceptual Estimation

scholarly journals Perceptual estimation obeys Occam's razor

2013 ◽  
Vol 4 ◽  
Author(s):  
Samuel J. Gershman ◽  
Yael Niv
Keyword(s):  
Occam’S Razor ◽  
Perceptual Estimation ◽  
Occam's Razor

Perception and Conservation of Length: Comparative Study of Rwandese and French-Canadian Children

1974 ◽  
Vol 39 (1) ◽  
pp. 363-368 ◽  
Author(s):  
Adrien Pinard ◽  
Guy Lavoie
Keyword(s):  
Comparative Study ◽  
Systematic Error ◽  
Ethnic Origin ◽  
Perceptual Task ◽  
French Canadian ◽  
French Canadians ◽  
Wide Difference ◽  
Variable Line ◽  
Operational Level ◽  
Perceptual Estimation

3 groups of children (64 urban French-Canadians, 62 rural schooled Rwandese, 64 rural unschooled Rwandese) were tested on their conservation and perception of length in order to determine whether Piaget's (1969) interpretation of the relation between the two tasks might be generalized to children differing in ethnic origin, urbanization, and schooling The results did not confirm Piaget's main findings on the importance of the upper protruding line and on the superiority of preoperational over operational children in the perceptual estimation of length. In spite of wide difference between the three groups on the perceptual task (overestimation of the variable line by French-Canadians, overestimation of the standard by schooled Rwandese, no systematic error in unschooled Rwandese) and on the conceptual task (operational level attained first by French-Canadians, then by schooled Rwandese and finally by unschooled Rwandese), the perception of length was not decisively influenced by the protrusion of the upper line and was significantly better for operational than for preoperational children for all three groups.

Physical and perceptual estimation of differences between loudspeakers

2006 ◽  
Vol 334 (12) ◽  
pp. 732-736 ◽  
Author(s):  
Mathieu Lavandier ◽  
Philippe Herzog ◽  
Sabine Meunier
Keyword(s):  
Perceptual Estimation

The “Diagonal Effect”: a Systematic Error in Oblique Antisaccades

2008 ◽  
Vol 100 (2) ◽  
pp. 587-597 ◽  
Author(s):  
John D. Koehn ◽  
Elizabeth Roy ◽  
Jason J. S. Barton
Keyword(s):  
Systematic Error ◽  
Human Subjects ◽  
Block Design ◽  
Polar Angle ◽  
Spatial Location ◽  
Polar Coordinates ◽  
Uncertain Information ◽  
Visually Guided ◽  
Perceptual Estimation ◽  
Horizontal Vector

Antisaccades are known to show greater variable error and also a systematic hypometria in their amplitude compared with visually guided prosaccades. In this study, we examined whether their accuracy in direction (as opposed to amplitude) also showed a systematic error. We had human subjects perform prosaccades and antisaccades to goals located at a variety of polar angles. In the first experiment, subjects made prosaccades or antisaccades to one of eight equidistant locations in each block, whereas in the second, they made saccades to one of two equidistant locations per block. In the third, they made antisaccades to one of two locations at different distances but with the same polar angle in each block. Regardless of block design, the results consistently showed a saccadic systematic error, in that oblique antisaccades (but not prosaccades) requiring unequal vertical and horizontal vector components were deviated toward the 45° diagonal meridians. This finding could not be attributed to range effects in either Cartesian or polar coordinates. A perceptual origin of the diagonal effect is suggested by similar systematic errors in other studies of memory-guided manual reaching or perceptual estimation of direction, and may indicate a common spatial bias when there is uncertain information about spatial location.

scholarly journals Distributed neural replay of decision confidence mediates informational conformity

2019 ◽  
Author(s):  
Ali Mahmoodi ◽  
Hamed Nili ◽  
Carsten Mehring ◽  
Bahador Bahrami
Keyword(s):  
Social Change ◽  
Anterior Cingulate ◽  
Dorsal Anterior Cingulate Cortex ◽  
Estimation Task ◽  
Decision Confidence ◽  
Computational Implementation ◽  
Dorsolateral Prefrontal ◽  
Social Use ◽  
Perceptual Estimation

AbstractWe occasionally receive conflicting views from others. To maximize accuracy, we should exercise informational conformity by changing our mind proportional to our confidence about our initial view. This account predicts that neural correlates of confidence in the private decision should be replayed as the private and social information are integrated. In a perceptual estimation task (N=120), influence from others was proportional to private confidence. Human fMRI (N=20) showed that consistent with the replay hypothesis, confidence covaried with temporally distributed activity during private estimate (Precuneus and dorsal anterior cingulate cortex, dACC), social change of mind (dACC) and social outcome (dorsolateral prefrontal cortex and dACC). During social change of mind and only when paired with alleged human (but not with computer) partners, left temproparietal junction carried information about participants’ social use of confidence. Our study reveals the neuronal substrates of the role of confidence in computational implementation of informational conformity.

scholarly journals An Improved Logistic Function for Mapping Raw Scores of Perceptual Evaluation of Speech Quality (PESQ)

2018 ◽  
pp. 1-10
Author(s):  
A. Olatubosun ◽  
Patrick O. Olabisi
Keyword(s):  
Mapping Function ◽  
Speech Quality ◽  
Logistic Growth ◽  
Quality Estimation ◽  
Mapping Functions ◽  
Perceptual Evaluation ◽  
Logistic Mapping ◽  
Standard Mapping ◽  
Perceptual Estimation

Voice service being the major offering of telecommunication networks, its level of Quality of Service (QoS) largely determines the performance of these networks. This work evaluated the state-of-the-art Perceptual Evaluation of Speech Quality (PESQ) objective model for perceptual estimation of the quality of transmitted speech signals. Perceptual estimation of the quality of speech is predominantly done by subjective techniques and the results presented as Mean Opinion Scores (MOS), which has a scale from 1 for poor quality to 5 for excellent quality. Despite constraints of the subjective approach to perceptual speech quality estimation, its scores serves as the basis for correlating quality scores from objective techniques for speech quality estimation. Original or reference speeches were recorded using professional studio equipment and software, and guided by provisions of ITU-T P.830. The speeches were transmitted over three mobile wireless networks. A speech database consisting of 64 original (32 male and 32 female) and 192 transmitted speeches was developed. Reference speeches and their corresponding transmitted (network-degraded) speeches were tested on the PESQ model to estimate their quality scores. The raw PESQ quality scores are within the scale range of -0.5 and 4.5. They were mapped to the MOS scale for linear comparison of the scales. Study of PESQ model showed several shortcomings, some of which have been improved upon by previous researchers. Evaluating PESQ mapping function (in ITU-T Rec P.862.1) showed the need for better coverage of the MOS scale. Analysis of solution for the logistic growth function was done and parameters were optimised which resulted in the development of a new robust logistic mapping function. The raw PESQ quality scores were mapped using the developed mapping function as well as two known standard mapping functions, namely: ITU-T P.862.1 and Morfitt and Cotanis mapping functions. The mapped scores known as PESQ MOS-listening quality objective (PESQ MOS-LQO) obtained with the three functions were tested using ANOVA at a significant figure of . The developed logistic mapping function offered a quality score coverage of 98.6% of the MOS scale. This was evaluated against the two known standard mapping functions and the developed function offered improvement of 11.8 and 4.9% over and above their 86.8 and 93.7% coverage of the MOS scale respectively. At the significance level of , an F-value of 60.6042, a critical-F of 3.04, and a p-value of 4.61721E-21 were obtained. With p < 0.05, the Null Hypothesis was rejected, and the critical-F value being less than the F-statistic value confirmed the rejection. Therefore, the data distribution of at least one of the functions has a different mean and belongs to a separate population of performance.

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