scholarly journals Does Sound Influence Perceived Duration of Visual Motion?

2021 ◽  
Vol 12 ◽  
Author(s):  
Alessandro Carlini ◽  
Emmanuel Bigand
Keyword(s):  
Visual Motion ◽  
Reproduction Task ◽  
Complex Sounds ◽  
Time Reproduction ◽  
Complex Stimuli ◽  
Silent Condition ◽  
Key Factor ◽  
Performance Results ◽  
Duration Estimation ◽  
Multimodal Perception

Multimodal perception is a key factor in obtaining a rich and meaningful representation of the world. However, how each stimulus combines to determine the overall percept remains a matter of research. The present work investigates the effect of sound on the bimodal perception of motion. A visual moving target was presented to the participants, associated with a concurrent sound, in a time reproduction task. Particular attention was paid to the structure of both the auditory and the visual stimuli. Four different laws of motion were tested for the visual motion, one of which is biological. Nine different sound profiles were tested, from an easier constant sound to more variable and complex pitch profiles, always presented synchronously with motion. Participants’ responses show that constant sounds produce the worst duration estimation performance, even worse than the silent condition; more complex sounds, instead, guarantee significantly better performance. The structure of the visual stimulus and that of the auditory stimulus appear to condition the performance independently. Biological motion provides the best performance, while the motion featured by a constant-velocity profile provides the worst performance. Results clearly show that a concurrent sound influences the unified perception of motion; the type and magnitude of the bias depends on the structure of the sound stimulus. Contrary to expectations, the best performance is not generated by the simplest stimuli, but rather by more complex stimuli that are richer in information.

Sense of time in children with ADHD: Effects of duration, distraction, and stimulant medication

1997 ◽  
Vol 3 (4) ◽  
pp. 359-369 ◽  
Author(s):  
RUSSELL A. BARKLEY ◽  
SETH KOPLOWITZ ◽  
TAMARA ANDERSON ◽  
MARY B. McMURRAY
Keyword(s):  
Stimulant Medication ◽  
Recent Theory ◽  
Interval Duration ◽  
Time Intervals ◽  
Reproduction Task ◽  
Children With Adhd ◽  
Time Reproduction ◽  
Control Subjects ◽  
Adhd Children ◽  
Sense Of Time

A recent theory of ADHD predicts a deficiency in sense of time in the disorder. Two studies were conducted to test this prediction, and to evaluate the effects of interval duration, distraction, and stimulant medication on the reproductions of temporal durations in children with ADHD. Study I: 12 ADHD children and 26 controls (ages 6–14 years) were tested using a time reproduction task in which subjects had to reproduce intervals of 12, 24, 36, 48, and 60 s. Four trials at each duration were presented with a distraction occurring on half of these trials. Control subjects were significantly more accurate than ADHD children at most durations and were unaffected by the distraction. ADHD children, in contrast, were significantly less accurate when distracted. Both groups became less accurate with increasing durations to be reproduced. Study II: Tested three doses of methylphenidate (MPH) and placebo on the time reproductions of the 12 ADHD children. ADHD children became less accurate with increasing durations and distraction was found to reduce accuracy at 36 s or less. No effects of MPH were evident. The results of these preliminary studies seem to support the prediction that sense of time is impaired in children with ADHD. The capacity to accurately reproduce time intervals in ADHD children does not seem to improve with administration of stimulant medication. (JINS, 1997, 3, 359–369.)

scholarly journals Precision Timing with α–β Oscillatory Coupling: Stopwatch or Motor Control?

2020 ◽  
Vol 32 (9) ◽  
pp. 1624-1636
Author(s):  
Tadeusz W. Kononowicz ◽  
Tilmann Sander ◽  
Hedderik Van Rijn ◽  
Virginie van Wassenhove
Keyword(s):  
Motor Control ◽  
Relevant Information ◽  
Time Interval ◽  
Beta Activity ◽  
Motor Timing ◽  
Reproduction Task ◽  
Temporal Precision ◽  
Time Reproduction ◽  
Timing Precision ◽  
Oscillatory Coupling

Precise timing is crucial for many behaviors ranging from conversational speech to athletic performance. The precision of motor timing has been suggested to result from the strength of phase–amplitude coupling (PAC) between the phase of alpha oscillations (α, 8–12 Hz) and the power of beta activity (β, 14–30 Hz), herein referred to as α–β PAC. The amplitude of β oscillations has been proposed to code for temporally relevant information and the locking of β power to the phase of α oscillations to maintain timing precision. Motor timing precision has at least two sources of variability: variability of timekeeping mechanism and variability of motor control. It is ambiguous to which of these two factors α–β PAC should be ascribed: α–β PAC could index precision of stopwatch-like internal timekeeping mechanisms, or α–β PAC could index motor control precision. To disentangle these two hypotheses, we tested how oscillatory coupling at different stages of a time reproduction task related to temporal precision. Human participants encoded and subsequently reproduced a time interval while magnetoencephalography was recorded. The data show a robust α–β PAC during both the encoding and reproduction of a temporal interval, a pattern that cannot be predicted by motor control accounts. Specifically, we found that timing precision resulted from the trade-off between the strength of α–β PAC during the encoding and during the reproduction of intervals. These results support the hypothesis that α–β PAC codes for the precision of temporal representations in the human brain.

scholarly journals Integration of visual and tactile information in reproduction of traveled distance

2017 ◽  
Vol 118 (3) ◽  
pp. 1650-1663 ◽  
Author(s):  
Jan Churan ◽  
Johannes Paul ◽  
Steffen Klingenhoefer ◽  
Frank Bremmer
Keyword(s):  
Visual Information ◽  
Tactile Stimulus ◽  
Visual Motion ◽  
Air Flow ◽  
Natural World ◽  
Sources Of Information ◽  
Reproduction Task ◽  
Tactile Information ◽  
Tactile Stimuli ◽  
Self Motion

In the natural world, self-motion always stimulates several different sensory modalities. Here we investigated the interplay between a visual optic flow stimulus simulating self-motion and a tactile stimulus (air flow resulting from self-motion) while human observers were engaged in a distance reproduction task. We found that adding congruent tactile information (i.e., speed of the air flow and speed of visual motion are directly proportional) to the visual information significantly improves the precision of the actively reproduced distances. This improvement, however, was smaller than predicted for an optimal integration of visual and tactile information. In contrast, incongruent tactile information (i.e., speed of the air flow and speed of visual motion are inversely proportional) did not improve subjects’ precision indicating that incongruent tactile information and visual information were not integrated. One possible interpretation of the results is a link to properties of neurons in the ventral intraparietal area that have been shown to have spatially and action-congruent receptive fields for visual and tactile stimuli. NEW & NOTEWORTHY This study shows that tactile and visual information can be integrated to improve the estimates of the parameters of self-motion. This, however, happens only if the two sources of information are congruent—as they are in a natural environment. In contrast, an incongruent tactile stimulus is still used as a source of information about self-motion but it is not integrated with visual information.

Effect of Motion Perception on Intertemporal Choice Is Associated With the Altered Time Perception

2018 ◽  
Vol 122 (1) ◽  
pp. 117-134 ◽  
Author(s):  
Xianchun Li ◽  
Di Yuan ◽  
Ying Fan ◽  
Chao Yan ◽  
Liangcai Gao
Keyword(s):  
Motion Perception ◽  
Time Perception ◽  
Intertemporal Choice ◽  
Critical Role ◽  
Random Order ◽  
Forward Motion ◽  
Reproduction Task ◽  
Perception Task ◽  
Time Reproduction ◽  
Motion Condition

Intertemporal choice refers to the choice between receiving a small immediate reward or a large delayed one. Previous studies have indicated that time perception plays a critical role in the intertemporal choice, and it could be affected by the features of the target stimulus in the time reproduction task, such as speed of movement and state of motion. However, there is no evidence about whether backward or forward motion perception could alter the intertemporal choice. Thus, in our current study, 29 participants were asked to perform two tasks in a random order. One was the intertemporal choice task after viewing videos containing moving elements with forward/backward directions as well as stationary ones, and another was the time perception task. We found that the discounting rate in intertemporal choice was significantly larger in backward motion condition than in both forward motion and stationary conditions, indicating that backward motion perception made participants more myopic (specifically, more likely to choose the smaller immediate reward instead of the large delayed one) during their decision-makings. Meanwhile, participants overestimated the temporal duration in a time perception task in backward motion condition compared to the other two conditions. Furthermore, the Pearson’s correlation analysis showed that the changes of the intertemporal choice induced by backward motion perception could be associated with the altered time perception. As far as we know, we provide the first evidence on influence of motion perception on the intertemporal choice as well as its possible cognitive correlates, which extend previous studies on cognitive basis of the intertemporal choices.

scholarly journals Differences in perceived duration between plausible biological and non-biological stimuli

2019 ◽  
Author(s):  
Giuliana Martinatti Giorjiani ◽  
Claudinei Eduardo Biazoli ◽  
Marcelo S. Caetano
Keyword(s):  
Cognitive Processing ◽  
Biological Motion ◽  
Near Infrared ◽  
Visual Motion ◽  
Frame Rate ◽  
Cognitive Differences ◽  
Functional Near Infrared Spectroscopy ◽  
Reproduction Task ◽  
Neurophysiological Data ◽  
Perception Of Time

AbstractVisual motion stimuli can sometimes distort our perception of time. This effect is dependent on the apparent speed of the moving stimulus, where faster stimuli are usually perceived lasting longer than slower stimuli. Although it has been shown that neural and cognitive processing of biological motion stimuli differ from non-biological motion stimuli, no study has yet investigated whether perceived durations of biological stimuli differ from non-biological stimuli across different speeds. Here, a prospective temporal reproduction task was used to assess that question. Biological motion stimuli consisted in a human silhouette running in place. Non-biological motion stimuli consisted in a rectangle moving in a pendular way. Amount and plausibility of movement for each stimulus and frame-rate (speed) were evaluated by an independent group of participants. Although amount of movement was positively correlated to frame rate, movie clips involving biological motion stimuli were judged to last longer than non-biological motion stimuli only at frame rates in which movement was rated as plausible. These results suggest that plausible representations of biomechanical movement induce additional temporal distortions to those modulated by increases in stimulus speed. Moreover, most studies that have reported neural and cognitive differences in the processing of biological and non-biological motion stimuli acquired neurophysiological data using fMRI. The present study aimed additionally to report differences in the processing of biological and non-biological motion stimuli across different speeds using functional near infrared spectroscopy (fNIRS), a less costly and portable form of neurophysiological data acquisition.

scholarly journals HOW HIGH ARE THE PERFORMANCES OF ORGANIZATIONS OPERATING IN SERBIA?

2019 ◽  
pp. 215 ◽  
Author(s):  
Vuk Miletić ◽  
Slavomir Miletić ◽  
Nemanja Berber
Keyword(s):  
High Performance ◽  
Business Excellence ◽  
Key Factor ◽  
Speed To Market ◽  
Performance Development ◽  
Quality Of Products ◽  
Performance Results ◽  
Powerful Process ◽  
Organizational Performances

In the conditions of growing competition on the market, organizations must ensure their sustainability, first of all, by implementing a systemic concept of business conduct in which the management is recognized as a powerful process of achieving high organizational performances. It is a concept that enables the meeting of the needs of consumers on a level different to their target value. In this sense, organizations must be structured in such a way as to fulfill certain conditions and criteria thanks to which sustainably high performance is created, which is, in fact, the goal of this research. Such performance is created as a result of the development of management within key areas of operation – the quality of products and services, production cost, speed to market, and innovating and developing such products and services. Success of such organizations greatly depends on the managers’ ability to develop and keep a talented workforce, which is a key factor in high performance development. By mastering change, outstandingly managing and controlling the future, assumptions for achieving business excellence and achieving high performance results are created. To confirm the starting hypothesis, the method of analysis, the method of synthesis and the method of multiple comparison and statistical test are used.

scholarly journals PROMOTION OF SELF-CONFIDENCE OF A PROSPECTIVE MUSIC TEACHER AS A PERFORMER

2020 ◽  
Vol 2 ◽  
pp. 268
Author(s):  
Asta Rauduvaitė ◽  
Guanhua Bi
Keyword(s):  
Music Education ◽  
Self Regulation ◽  
Influential Factors ◽  
Music Teacher ◽  
Music Teaching ◽  
Education Students ◽  
Self Confidence ◽  
Key Factor ◽  
Major Factors ◽  
Performance Results

Self-confidence is a key factor that influences stage performance. To form a positive state while performing on the stage, self-confidence becomes the most important aspect, as it is one of the main guarantees of successful performing. However, in music teaching, many students lack self-confidence when performing, which in most cases hinders their performance results. The aim of the study is to reveal the peculiarities of promoting self-confidence of students as performers. A questionnaire and an interview with music education students were used to collect the data. The results of the questionnaire allow concluding that experience as a performer, physical and psychological preparation, and self-regulation are the three major factors influencing students’ lack of confidence during the performance. Additionally, the responses from the interview indicated other equally prominent and influential factors such as performing environment, practice level and stage experience. Lastly, the interviewed students proposed ways to boost self-confidence, which include gaining more music knowledge and improving their music skills, practicing harder and applying self-regulation.

Evaluation of time memory in acutely depressed patients, manic patients, and healthy controls using a time reproduction task

2008 ◽  
Vol 23 (6) ◽  
pp. 430-433 ◽  
Author(s):  
Richard Mahlberg ◽  
Thorsten Kienast ◽  
Tom Bschor ◽  
Mazda Adli
Keyword(s):  
Internal Clock ◽  
Time Interval ◽  
Short Time Interval ◽  
Time Intervals ◽  
Reproduction Task ◽  
Time Reproduction ◽  
Depressed Patients ◽  
Long Time ◽  
Short Time ◽  
Manic Patients

AbstractPatients with affective disorders have often been reported to experience subjective changes in how they perceive the flow of time. Time reproduction tasks provide information about the memory component of time perception and are thought to remain unaffected by pulse rate disturbances in the pacemaker of the internal clock.In our study, 30 patients with acute depression, 30 patients with acute mania, and 30 healthy subjects of all age groups were presented with a time reproduction task. Participants were asked to observe a stimulus presented on a computer screen for a certain length of time and, subsequently, to reproduce the stimulus for a similar length of time by pressing the space bar on the computer keyboard. Stimuli were presented to each subject for 1, 6, and 37 s.On average, the time intervals reproduced by manic patients were shorter than those reproduced by depressed patients. Manic patients reproduced the short time interval (6 s) correctly, but under-reproduced the long time interval (37 s, P < 0.001). Depressed patients correctly reproduced the long time interval, but over-reproduced the short time interval (P < 0.001).Remembering time intervals as having been longer than they actually were may lead to a slowed experience of time, as has been described in depressed patients; precisely the converse seems to apply to manic patients.

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