scholarly journals EFFECT OF AUDITORY DISTRACTION ON HAND AND FOOT REACTION TIME AMONG AGEING MALAYSIAN AUTOMOBILE DRIVERS

2020 ◽  
Vol 20 (Special1) ◽  
pp. 108-115
Author(s):  
Nazlin HA ◽  
Siti Zawiah MD
Keyword(s):  
Reaction Time ◽  
Traffic Accidents ◽  
Nerve Conduction Velocity ◽  
Movement Time ◽  
Reaction Times ◽  
Phone Call ◽  
Ageing Male ◽  
Loudness Level ◽  
Comfortable Loudness ◽  
Auditory Distractions

The involvement of ageing drivers in traffic accidents were reported but little cited on the severity of auditory driving distractions. Driving distraction contributes to increases in reaction time which can lead to safety traffic risks. Thus, in this study, hand and foot reaction times were measured in response to different distractions within the identical simulated driving route. The task varies in a controlled setting where soundless distractions were present, Comfortable Loudness Level (CLL), Uncomfortable Loudness Level (ULL) auditory distractions, and phone call distraction. Participants were among 40 Malaysian driving license holders consists of 57.5% males and 42.5% females with age mean, (M=51.83, SD=14.058). Results indicated that both hand and foot reaction time were shortest for CLL and longest during phone call. Ageing male scored shortest hand reaction time of 1.15s during CLL distraction. For foot reaction time, ageing male scores shortest of 0.92s for both CLL and no distractions. Pearson’s coefficient of correlation shows r>0.5. The results indicated hand reaction time was affected by foot reaction time (r=0.665), was significantly more for foot when compared with hand, could be because of difference in nerve conduction velocity and movement time of the hand when compared with that of foot.

Fractionated Reaction Times and Movement Times of Down Syndrome and Other Adults with Mental Retardation

1991 ◽  
Vol 8 (3) ◽  
pp. 221-233 ◽  
Author(s):  
Walter E. Davis ◽  
William A. Sparrow ◽  
Terry Ward
Keyword(s):  
Down Syndrome ◽  
Mental Retardation ◽  
Reaction Time ◽  
Time Delay ◽  
Movement Time ◽  
Reaction Times ◽  
Elbow Extension ◽  
Total Reaction ◽  
Time Motor ◽  
Total Reaction Time

A fractionation technique was employed to determine the locus of reaction time delay in Down syndrome (DS) and other adult subjects with mental retardation (MH). Twenty-three subjects (8 nondisabled, 8 MH, and 7 DS) responded to a light, sound, and combination light/sound signal. Dependent measures of premotor time, motor time, total reaction time, and movement time were obtained during a 20° elbow extension movement and were analyzed separately. As expected, both MH and DS subjects were slower and more variable in their responses than the subjects without disabilities. In turn, DS subjects were significantly slower but not more variable than the MH subjects. There were no significant differences between the DS and MH subjects on movement times. Evidence for both a specific (premotor) and a generalized (both premotor and motor) locus of delay was found. Some difference in signal effect was also found for the DS subjects.

Deficits in reaction times and movement times as correlates of hypokinesia in monkeys with MPTP-induced striatal dopamine depletion

1989 ◽  
Vol 61 (3) ◽  
pp. 651-668 ◽  
Author(s):  
W. Schultz ◽  
A. Studer ◽  
R. Romo ◽  
E. Sundstrom ◽  
G. Jonsson ◽  
...  
Keyword(s):  
Drug Therapy ◽  
Reaction Time ◽  
Movement Time ◽  
Reaction Times ◽  
Arm Movement ◽  
Dopamine Neurons ◽  
Prime Mover ◽  
Testing Period ◽  
Dopaminergic Drug ◽  
Nigrostriatal Dopamine Neurons

1. We quantitatively assessed deficits in the initiation and execution of arm movements occurring after destruction of nigrostriatal dopamine neurons by systemic administration of MPTP (1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine) (Sigma). Three monkeys performed a reaction time task in which they reached toward a single and constant target for food reward. 2. After administration of MPTP, all three monkeys showed hypokinesia necessitating dopamine precursor or receptor agonist treatment. The partial recovery of one animal from initial akinesia after 19 days permitted discontinuation of dopaminergic drug therapy, although marked hypokinesia remained present. The two other animals displayed additional, intermittent phases of rigidity and activation tremor and needed continuous dopaminergic drug therapy for most of the postlesion period. 3. Administration of MPTP significantly prolonged EMG reaction time in prime mover muscles and arm movement reaction time by 47-225% and 18-129%, respectively, on the six sides of the three animals, compared with control measurements before the lesion. EMG and arm movement reaction time increased over consecutive trials in most sessions comprising 110–130 movements, the first 20 movements showing almost normal values. The delay time between onsets of EMG and arm movement showed unsystematic changes. These deficits in movement initiation were observed both with and without dopamine precursor therapy. They lasted during the whole testing period of several months. 4. Linear correlations between arm movement onset and EMG onset in the two prime mover muscles, the extensor digitorum communis and the biceps, showed coefficients of mostly 0.7–0.9, both before and after MPTP. These data suggest that the temporal relationship between onsets of arm movement and EMG were not substantially affected by MPTP. 5. Arm movement time was divided into two phases. The duration of movement between the resting key and the target, a small food-containing box located ahead of the animal, was denoted as reaching movement time. The following hand manipulation inside the food box was measured as box movement time. After MPTP, both measures were significantly prolonged by 10-103% and 12–251%, respectively, on the six sides of the three monkeys. These deficits in movement execution were observed both with and without dopaminergic drug therapy and during the whole testing period. 6. Task performance after MPTP treatment was studied in one monkey in the absence of dopaminergic drug therapy. EMG and arm movement reaction times recovered partially over several weeks, while the prolongations in reaching and box movement times remained unchanged.(ABSTRACT TRUNCATED AT 400 WORDS)

The Study of Characteristic of Drivers Visual Attention Based on Driving Simulation Device

2013 ◽  
Vol 319 ◽  
pp. 326-330
Author(s):  
Ru Ting Xia ◽  
Jian Fan
Keyword(s):  
Reaction Time ◽  
Visual Attention ◽  
Traffic Accidents ◽  
Three Dimensional ◽  
Great Influence ◽  
Reaction Times ◽  
Neutral Condition ◽  
Driving Simulation ◽  
3D Space ◽  
Adaptive Ability

The number of traffic accidents keeps increasing with the development of traffic environments. There are a lot of accidents at twilight time. The cause of these accidents is depending upon the shift of drivers’ visual attention. The characteristic of visual attention in three-dimensional (3D) space were studied using a driving simulation device in order to test the effects of environment illuminance on the visual attention in this paper. In the experiments, two kind of illuminance conditions were used, brightness condition and twilight condition. In each experiment, there were three kinds of cue condition: valid, invalid and neutral condition. Observer moved forward at 0.44m/s speed, and illuminance were 480~680lx and 95~135lx in the experimental device inner. The subject’s task was to judge whether the target presented nearer than fixation point or further than it. Reaction times of the subjects on the cue were measured. As the results, it was claritied that (1) the visual adaptive ability of the subjects had a individual difference, (2) the shift of attention was faster from far to near than from near to far, (3) the reaction time was effected by the attention moved distance, (4) brightness has had very great influence upon the delay of reaction time of the drivers, and the delay of reaction time depended on the quantity of attention moved.

scholarly journals The Effects of Wearing Helmets on Reaction of Motorcycle Riders

Vehicles ◽  
2021 ◽  
Vol 3 (4) ◽  
pp. 840-850
Author(s):  
Dengchuan Cai ◽  
Yu-Hsuan Chen ◽  
Chih-Jen Lee
Keyword(s):  
Reaction Time ◽  
Traffic Accidents ◽  
Academic Research ◽  
Reaction Times ◽  
Time Analysis ◽  
Accident Rate ◽  
Great Loss ◽  
Different Types ◽  
Early Reaction ◽  
Full Face

In Taiwan, motorcycles are the most commonly used means of transportation and also have the highest accident rate. Because motorcycles are less stable and provide less protection than cars, motorcycle riders are vulnerable in traffic accidents. Furthermore, head trauma is often fatal, causing a great loss to society. Although helmets provide protection to the head, they also affect the visual field of motorcycle riders. However, the literature mostly focuses on the protective effect of helmets after a collision and rarely considers the influence of helmets prior to collisions. In the study design, participants wore three different types of helmet and watched a pre-recorded video of an actual street with pre-placed warning triangles at a speed of 60 km/h. Participants were asked to press a button when they saw a warning triangle. The time between participants seeing the warning triangle and arriving at the warning triangle was calculated. This time is referred to as the “early reaction time.” The number of missed presses and false presses was also recorded. The results of the study show that: (1) Of the three types of helmet, wearing half helmets produced the longest early reaction times, followed by 3/4 helmets, with full face helmets with the shortest early reaction times. (2) Early reaction times when wearing a half helmet were the same as early reaction times when not wearing a helmet. (3) The results for the total number of missed and false presses when wearing the three types of helmet were the same as for the results of the early reaction time analysis. (4) Sex and age had no effect on early reaction times. The experimental results can be used as a reference for helmet design and academic research.

scholarly journals Reaction time of drivers who caused road traffic accidents

2009 ◽  
Vol 62 (3-4) ◽  
pp. 114-119 ◽  
Author(s):  
Predrag Djuric ◽  
Danka Filipovic
Keyword(s):  
Reaction Time ◽  
Traffic Accident ◽  
Traffic Accidents ◽  
Human Factor ◽  
Road Traffic ◽  
Reaction Times ◽  
Road Traffic Accidents ◽  
Alcohol And Drugs ◽  
Car Accidents ◽  
Significant Difference

Introduction. Human factor is the single cause of road traffic injuries in 57%, and together with other factors in more than 90% of all road traffic accidents. Human factor includes many aspects, where reaction time is very important. Material and methods. Thirty healthy drivers 28-40 y.o. with 50-500 km passed per week, having caused at least one road traffic accident in the last ten years were selected, provided they were not under the influence of alcohol and drugs during traffic accident. The same number of control were selected. Both cases and controls were tested to reaction time. Results. We found statistically significant difference between car drivers who caused car accidents and those who did not in both simple and choice reaction times. Discussion. Car drivers who caused road traffic accidents have longer reaction time (both simple and choice reaction time), but as the tasks were more complex, that difference was less visible. Since drivers involved in this study had introductory phase before measuring their reaction times, they faced with unpleasant sound when they made mistake, which forced them to be aware not to make a mistake in further tasks, so they showed longer reaction times. Conclusion. Measuring of reaction time seems to be important, and as we have showed they are different in drivers who have caused road traffic accidents and those who have do not.

scholarly journals The effect of fog on detection of driving hazards after dark

2017 ◽  
Vol 50 (7) ◽  
pp. 1024-1044 ◽  
Author(s):  
S Fotios ◽  
C Cheal ◽  
S Fox ◽  
J Uttley
Keyword(s):  
Reaction Time ◽  
Detection Rate ◽  
Traffic Accidents ◽  
Peripheral Vision ◽  
Road Traffic ◽  
Reaction Times ◽  
Road Surface ◽  
Scale Model ◽  
Road Traffic Accidents ◽  
Fog Density

The presence of fog leads to an increase in road traffic accidents. An experiment was carried out using a scale model to investigate how the detection of hazards in peripheral vision was affected by changes in luminance (0.1 cd/m2 and 1.0 cd/m2 road surface luminance), scotopic/photopic (S/P) ratio (0.65 and 1.40) and fog density (none, thin and thick). Two hazards were used, a road surface obstacle and lane change of another vehicle. Increasing luminance, and reducing from thick to thin fog, led to significant increase in detection rate and a reduction in reaction time, for both types of hazard. The effect of a change in S/P ratio was significant only when measuring detection of the surface obstacle using reaction times, under the thick fog, with an increase in S/P ratio leading to a shorter reaction time.

scholarly journals Psychomotor Abilities of Professional Handball Players

2019 ◽  
Vol 16 (11) ◽  
pp. 1909 ◽  
Author(s):  
Krzysztof Przednowek ◽  
Maciej Śliż ◽  
Justyna Lenik ◽  
Bartosz Dziadek ◽  
Stanisław Cieszkowski ◽  
...  
Keyword(s):  
Reaction Time ◽  
Simple Reaction Time ◽  
Movement Time ◽  
Reaction Times ◽  
Control Group ◽  
Dominant Hand ◽  
Coordination Test ◽  
Hand Eye Coordination ◽  
Time Test ◽  
Reaction Time Test

The main purpose of the paper was to evaluate selected psychomotor abilities of handball players depending on the competition class (league), position on the court, training seniority and the dominant hand. The study covered a group of 40 handball players (age: 24.02 ± 3.99), while 50 non-training men (age: 22.90 ± 1.13) formed the control group. Studies were performed using Test2Drive computer tests. The following four tests were used for measuring psychomotor fitness: simple reaction time test, choice reaction time test, hand-eye coordination test and spatial anticipation test. An analysis revealed that handball players had better reaction times and movement times than the control group. The league, position on the court, training seniority and the dominant upper limb were analysed for their impact on the reaction time and movement time in handball players. An analysis of psychomotor abilities of handball players with regard to the league revealed that in the majority of tests the Superliga players had a shorter reaction time than players in lower leagues.

Effects of Electromyographic Biofeedback on Reaction Time and Movement Time

1987 ◽  
Vol 65 (3) ◽  
pp. 855-859 ◽  
Author(s):  
Richard B. Schultz ◽  
Bruce Etnyre ◽  
John M. Mc Arthur ◽  
John W. Brelsford
Keyword(s):  
Reaction Time ◽  
Movement Time ◽  
Reaction Times ◽  
Emg Biofeedback ◽  
Control Group ◽  
Triceps Brachii ◽  
Written Information ◽  
Electromyographic Biofeedback ◽  
Male Subjects ◽  
Experimental Group

The effects of electromyographic (EMG) biofeedback on reaction time (RT) and movement time (MT) were investigated utilizing 42 right-handed, male subjects from a university population. Subjects were randomly divided into three groups, a control group and two experimental groups. Both experimental groups were exposed to their EMG signals from their triceps brachii during the task, one experimental group received written information explaining the purpose of the EMG was to improve performance through biofeedback. Reaction times of the first block of 25 trials were significantly faster than those on the subsequent three blocks of trials for all groups. This provided evidence of learning. No other significant effects for reaction times were observed. Mean movement time for the EMG-only group was significantly slower than the means of either the Control group or EMG-Biofeedback group, with no difference between the latter two. The differences between experimental groups may have been related to alteration of strategy, anxiety, or motivation.

Modeling Within-Person Variance in Reaction Time Data of Older Adults

GeroPsych ◽  
2011 ◽  
Vol 24 (4) ◽  
pp. 169-176 ◽  
Author(s):  
Philippe Rast ◽  
Daniel Zimprich
Keyword(s):  
Reaction Time ◽  
Cognitive Aging ◽  
Reaction Times ◽  
Reaction Time Task ◽  
Reaction Time Data ◽  
Scale Model ◽  
Time Data ◽  
Time Task ◽  
The Mean ◽  
Second Wave

In order to model within-person (WP) variance in a reaction time task, we applied a mixed location scale model using 335 participants from the second wave of the Zurich Longitudinal Study on Cognitive Aging. The age of the respondents and the performance in another reaction time task were used to explain individual differences in the WP variance. To account for larger variances due to slower reaction times, we also used the average of the predicted individual reaction time (RT) as a predictor for the WP variability. Here, the WP variability was a function of the mean. At the same time, older participants were more variable and those with better performance in another RT task were more consistent in their responses.

The Level of Reaction Time Determines the ERP Correlates of Auditory Negative Priming

2006 ◽  
Vol 20 (3) ◽  
pp. 186-194 ◽  
Author(s):  
Susanne Mayr ◽  
Michael Niedeggen ◽  
Axel Buchner ◽  
Guido Orgs
Keyword(s):  
Reaction Time ◽  
Negative Priming ◽  
Effect Size ◽  
Priming Effect ◽  
Reaction Times ◽  
Negative Priming Effect ◽  
Episodic Retrieval ◽  
Time Level ◽  
Fast Reactions ◽  
Priming Condition

Responding to a stimulus that had to be ignored previously is usually slowed-down (negative priming effect). This study investigates the reaction time and ERP effects of the negative priming phenomenon in the auditory domain. Thirty participants had to categorize sounds as musical instruments or animal voices. Reaction times were slowed-down in the negative priming condition relative to two control conditions. This effect was stronger for slow reactions (above intraindividual median) than for fast reactions (below intraindividual median). ERP analysis revealed a parietally located negativity of the negative priming condition compared to the control conditions between 550-730 ms poststimulus. This replicates the findings of Mayr, Niedeggen, Buchner, and Pietrowsky (2003) . The ERP correlate was more pronounced for slow trials (above intraindividual median) than for fast trials (below intraindividual median). The dependency of the negative priming effect size on the reaction time level found in the reaction time analysis as well as in the ERP analysis is consistent with both the inhibition as well as the episodic retrieval account of negative priming. A methodological artifact explanation of this effect-size dependency is discussed and discarded.

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