scholarly journals Fast Color-Weakness Compensation with Discrimination Threshold Matching

2011 ◽  
pp. 176-187 ◽  
Author(s):  
Rika Mochizuki ◽  
Satoshi Oshima ◽  
Jinhui Chao
Keyword(s):  
Discrimination Threshold

Absolute pitch ability is not associated with advantage in musical tension processing

2020 ◽  
Author(s):  
Linshu Zhou ◽  
Fang Liu ◽  
Tang Hai ◽  
Jun Jiang ◽  
Dongrui Man ◽  
...  
Keyword(s):  
Detection Threshold ◽  
Absolute Pitch ◽  
Discrimination Threshold ◽  
Pitch Change ◽  
Letter Naming ◽  
Direction Discrimination ◽  
Pitch Direction ◽  
Lower Accuracy ◽  
Tonal Hierarchy ◽  
The Stability

Absolute pitch (AP), a superior ability of pitch letter naming in the absence of a reference note, has long been viewed as an indicator of human musical talent and thus as evidence for the adaptationist hypothesis of music evolution. Little is known, however, whether AP possessors are superior to non-AP possessors in music processing. The present study investigated whether the AP ability facilitates musical tension processing in perceptual and experienced tasks. Twenty-one AP possessors and 21 matched non-AP possessors were tested using novel melodies in C and non-C contexts. Results indicated that the two groups provided comparable ratings of perceived and felt tension for melodies in both contexts. While AP possessors demonstrated lower accuracy with longer reaction time than non-AP possessors in naming movable solfège syllables for pitch in the pretest, their tension rating profiles showed a similar tonal hierarchy as non-AP possessors in regard to the stability of the ending tones of the melodies in both major and minor keys. Correlation analyses suggested that musical tension ratings were not significantly related to performance in pitch letter, movable solfège syllable naming, pitch change detection threshold, or pitch direction discrimination threshold for either group. These findings suggest that pitch naming abilities (either pitch letter or movable solfège syllable naming) do not benefit processing of perceived or felt musical tension, providing evidence to support the hypothesis that AP ability is not associated with advantage in music processing.

Effect of Realistic Test Conditions on Spectral and Temporal Processing in Normal-Hearing Listeners

2021 ◽  
Vol 30 (1) ◽  
pp. 160-169
Author(s):  
Yang-Soo Yoon ◽  
Callie Michelle Boren ◽  
Brianna Diaz
Keyword(s):  
Temporal Processing ◽  
Detection Threshold ◽  
Frequency Discrimination ◽  
Normal Hearing ◽  
Discrimination Threshold ◽  
Test Environment ◽  
Test Conditions ◽  
Significant Difference ◽  
Test Order ◽  
Pure Tones

Purpose To measure the effect of testing conditions (in the soundproof booth vs. quiet room), test order, and number of test sessions on spectral and temporal processing in normal-hearing (NH) listeners. Method Thirty-two adult NH listeners participated in the three experiments. For all three experiments, the stimuli were presented to the left ear at the subjects' most comfortable level through headphones. All tests were administered in an adaptive three-alternative forced-choice paradigm. Experiment 1 was designed to compare the effect of soundproof booth and quiet room test conditions on amplitude modulation detection threshold and modulation frequency discrimination threshold with each of the five modulation frequencies. Experiment 2 was designed to compare the effect of two test orders on the frequency discrimination thresholds under the quiet room test conditions. The thresholds were first measured in the ascending and descending order of four pure tones, and then with counterbalanced order. For Experiment 3, the amplitude discrimination threshold under the quiet room testing condition was assessed 3 times to determine the effect of the number of test sessions. Then the thresholds were compared over the sessions. Results Results showed no significant effect of test environment. The test order is an important variable for frequency discrimination, particularly between piano tunes and pure tones. Results also show no significant difference across test sessions. Conclusions These results suggest that a controlled test environment may not be required in spectral and temporal assessment for NH listeners. Under the quiet test environment, a single outcome measure is sufficient, but test orders should be counterbalanced.

scholarly journals Meditation Experience Predicts Introspective Accuracy

2017 ◽  
Author(s):  
Kieran Fox ◽  
Matt Dixon ◽  
Melissa Ellamil ◽  
Evan Thompson ◽  
Kalina Christoff
Keyword(s):  
Body Representation ◽  
Discrimination Threshold ◽  
Large Individual ◽  
Tactile Sensitivity ◽  
Body Scanning ◽  
Body Regions ◽  
Mean Size ◽  
Meditation Experience ◽  
Subjective Reports

The accuracy of subjective reports, especially those involving introspection of one’s own internal processes, remains unclear, and research has demonstrated large individual differences in introspective accuracy. It has been hypothesized that introspective accuracy may be heightened in persons who engage in meditation practices, due to the highly introspective nature of such practices. We undertook a preliminary exploration of this hypothesis, examining introspective accuracy in a cross-section of meditation practitioners (1–15,000 hrs experience). Introspective accuracy was assessed by comparing subjective reports of tactile sensitivity for each of 20 body regions during a ‘body-scanning’ meditation with averaged, objective measures of tactile sensitivity (mean size of body representation area in primary somatosensory cortex; two-point discrimination threshold) as reported in prior research. Expert meditators showed significantly better introspective accuracy than novices; overall meditation experience also significantly predicted individual introspective accuracy. These resultssuggest that long-term meditators provide more accurate introspective reports than novices.

scholarly journals Perceived metamorphopsia and orientation discrimination threshold before and after the surgical removal of epiretinal membrane

2019 ◽  
Vol 19 (10) ◽  
pp. 40c
Author(s):  
Ruijing Xia ◽  
Binbin Su ◽  
Tianyu Chen ◽  
Jia Zhou ◽  
Hua Bi ◽  
...  
Keyword(s):  
Epiretinal Membrane ◽  
Discrimination Threshold ◽  
Orientation Discrimination ◽  
Surgical Removal ◽  
Before And After

scholarly journals Measurement & Analysis of the Temporal Discrimination Threshold Applied to Cervical Dystonia

10.3791/56310 ◽  
2018 ◽  
Author(s):  
Rebecca B Beck ◽  
Eavan M McGovern ◽  
John S Butler ◽  
Dorina Birsanu ◽  
Brendan Quinlivan ◽  
...  
Keyword(s):  
Cervical Dystonia ◽  
Temporal Discrimination ◽  
Discrimination Threshold

scholarly journals Variation in multicomponent recognition cues alters egg rejection decisions: a test of the optimal acceptance threshold hypothesis

2019 ◽  
Vol 374 (1769) ◽  
pp. 20180195 ◽  
Author(s):  
Daniel Hanley ◽  
Analía V. López ◽  
Vanina D. Fiorini ◽  
Juan C. Reboreda ◽  
Tomáš Grim ◽  
...  
Keyword(s):  
Brood Parasitism ◽  
Response Curve ◽  
Discrimination Threshold ◽  
Single Component ◽  
Decision Makers ◽  
Egg Rejection ◽  
Theme Issue ◽  
Acceptance Threshold ◽  
Behavioural Responses ◽  
Molothrus Bonariensis

The optimal acceptance threshold hypothesis provides a general predictive framework for testing behavioural responses to discrimination challenges. Decision-makers should respond to a stimulus when the perceived difference between that stimulus and a comparison template surpasses an acceptance threshold. We tested how individual components of a relevant recognition cue (experimental eggs) contributed to behavioural responses of chalk-browed mockingbirds, Mimus saturninus , a frequent host of the parasitic shiny cowbird, Molothrus bonariensis . To do this, we recorded responses to eggs that varied with respect to two components: colour, ranging from bluer to browner than the hosts' own eggs, and spotting, either spotted like their own or unspotted. Although tests of this hypothesis typically assume that decisions are based on perceived colour dissimilarity between own and foreign eggs, we found that decisions were biased toward rejecting browner eggs. However, as predicted, hosts tolerated spotted eggs more than unspotted eggs, irrespective of colour. These results uncover how a single component of a multicomponent cue can shift a host’s discrimination threshold and illustrate how the optimal acceptance threshold hypothesis can be used as a framework to quantify the direction and amount of the shift (in avian perceptual units) of the response curve across relevant phenotypic ranges. This article is part of the theme issue ‘The coevolutionary biology of brood parasitism: from mechanism to pattern’.

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