scholarly journals Visual reaction time of drivers versus healthy adults: a comparative study

2020 ◽  
Vol 1 (1) ◽  
pp. 3-7
Author(s):  
Mrigendra Amatya ◽  
Samjhana Thapa ◽  
Roshan Kasti ◽  
Ojashwi Nepal
Keyword(s):  
Reaction Time ◽  
Reaction Times ◽  
T Test ◽  
Whole Body ◽  
Visual Reaction Time ◽  
Student Group ◽  
Vehicular Pollution ◽  
Left Hand ◽  
Visual Reaction ◽  
One Year

Introduction: Driving is a highly demanding profession requiring heightened alertness while remaining in an ergonomically constrained position and also associated with exposure to vehicular pollution and whole body vibration. We explored whether drivers’ reaction time is different to student group who also remain in sitting position for long hours but not exposed to other factors. Materials and methods: Drivers with at least one year of occupational history and under/post-graduate students were randomly selected. Their reaction time in seconds (RT) was measured by the ruler drop method (RDM) and compared with independent t test. Right vs left hand RTs were compared within groups by paired t test. Results: Thirty students (21.8±2.25 years) and 37 drivers (33.73±9.77 years) participated in the study. The drivers had RT of 2.03±0.2s on both the hands; students’ RT were 2.01±0.16s on right and 2.02±0.17s on left hands. For both hands, the differences were not significant between drivers and students (p>0.5). Right and left RT were also comparable for both groups (p>0.5). Conclusions: Bus drivers with at least one year occupational exposure have reaction times ruler drop stimulus not significantly different from controls (students).

Comparison of a 12-Week Whole-Body Exergaming Program on Young Adults: Differentiation in Flexibility, Muscle Strength, Reaction Time, and Walking Speed Between Sexes

2018 ◽  
Vol 29 (7) ◽  
pp. 424-432 ◽  
Author(s):  
Yeşim Bakar ◽  
Alper Tuğral ◽  
Alp Özel ◽  
Yasin D. Altuntaş
Keyword(s):  
Reaction Time ◽  
Muscle Strength ◽  
Walking Speed ◽  
Whole Body ◽  
Video Gaming ◽  
Walk Test ◽  
Time Machine ◽  
Visual Reaction Time ◽  
Post Intervention ◽  
Visual Reaction

This study aimed to investigate the effects of exergaming on flexibility, muscle strength, reaction time, and walking speed of adults within sex differences. Fifty-four individuals participated in a 12-week exergaming program. Three 30-min sessions were conducted each week. Baseline and post-intervention assessments were done using the sit-and-reach and bend-over tests for flexibility, hand-held dynamometer for muscle strength, auditory and visual reaction time machine for reaction time, and 5-meter walk test for walking speed. There were no significant changes in the sit-and-reach, bend-over test, and auditory-visual reaction time for either gender ( p > .05) with the intervention. Walking speed and muscle strength improved after exergaming in both sexes ( p < .05). The study showed that the video gaming intervention led to significant and equal improvements in muscle strength and walking speed for both sexes; however, it had no impact on flexibility and auditory-visual reaction time.

Reaction Time and Visual Brightness: Within-Subject Correlations

1979 ◽  
Vol 48 (1) ◽  
pp. 107-115 ◽  
Author(s):  
Armand V. Cardello
Keyword(s):  
Reaction Time ◽  
Stimulus Intensity ◽  
Reaction Times ◽  
Visual Reaction Time ◽  
Visual Reaction ◽  
Two Measures ◽  
The Relationship ◽  
Linear Correlations ◽  
Visual Brightness ◽  
Magnitude Estimates

An experiment was conducted to compare visual reaction time and visual brightness within the same subjects. Simple reaction times and magnitude estimates of brightness were obtained in response to 1000-msec. flashes of 60.7, 67.5, 76.4, 85.1, and 93.4 dB re 10−10L white light. The relationship between reaction time and stimulus intensity was best described by a negative logarithmic function, while the relationship between magnitude estimates of brightness and stimulus intensity was best described by a power function. Linear correlations between reaction times and magnitude estimates indicated that visual reaction time and brightness are not proportional within all subjects. Previous reports of proportionality between these two measures were discussed as possibly being the result of inappropriate cross-experiment comparisons.

Reaction Time and Effect of Ritalin on Children with Learning Problems

1973 ◽  
Vol 36 (1) ◽  
pp. 75-82 ◽  
Author(s):  
Carl Spring ◽  
Lawrence Greenberg ◽  
Jimmy Scott ◽  
John Hopwood
Keyword(s):  
Reaction Time ◽  
Reaction Times ◽  
Reaction Time Task ◽  
Learning Problems ◽  
Poor Readers ◽  
School Age ◽  
Visual Reaction Time ◽  
Elementary School Age ◽  
Visual Reaction ◽  
Reading And Spelling

In Exp. I, 22 poor readers and 22 normal readers of elementary-school age were matched on age, IQ, and sex and tested with a visual reaction-time task requiring same-different judgments. On initial trials poor readers were slower than normal readers. In addition, the performance of poor readers deteriorated faster than that of normal readers as testing progressed. In Exp. II, 20 hyperactive boys taking methylphenidate medication, 19 hyperactive boys whose medication was temporarily discontinued, and 19 normal boys were tested. Reaction time on early trials was not significantly different for boys in the on-medication and off-medication groups; however, both hyperactive groups were slower than the normal group. As testing progressed, reaction times of normal boys and boys taking medication remained fairly stable, while the performance of hyperactive boys not taking medication declined. The significance of these results to reading and spelling is discussed.

scholarly journals The Effect of Different Learning Method on the Visual Reaction Time of Hand and Leg in High School Level Tennis Trainees

2020 ◽  
Vol 6 (2) ◽  
pp. 414
Author(s):  
Yahya Yıldırım ◽  
Ali Kızılet
Keyword(s):  
High School ◽  
Reaction Time ◽  
Statistical Significance ◽  
T Test ◽  
School Level ◽  
Visual Reaction Time ◽  
High School Level ◽  
Significant Difference ◽  
Visual Reaction ◽  
Post Test

The aim of this study is; to investigate the effects of differential training method on hand and leg visual reaction time in high school tennis trainees. 24 trainees (12 girls, 12 boys) attending a tennis course in a high school participated in the study voluntarily. It was determined that the mean age of the participants was 15.00±0.00 years, their body weight was 63.46±10.64 kg, their height was 1.65±0.06 m, and their body mass index was 23.26±2.91. According to the results of the pre-tests, 2 homogeneous groups of 12 people were created. One group formed the Differential Group (DG), the other the Traditional Group (TG), and each group included 6 girls and 6 boys. The training sessions were held 3 days a week (90 minutes each) and lasted 10 weeks in total. In the study, the visual reaction time (separately for hand and leg) was performed as a pre-test and a post-test using the Fitlight TrainerTM device. Paired Sample t test was used to examine the difference between pre-test and post-test of the same group. Independent Sample t test was used to measure the intergroup interaction between pre-tests and post-tests. To interpret the statistical significance level, p < 0.05 was accepted. As a conclusion; it was observed that both training methods shorten the visual reaction time, but there was no significant difference between the groups in pre-test and post-tests.

scholarly journals Effect of yogic relaxation technique on auditory and visual reaction times

2021 ◽  
Vol 9 (5) ◽  
pp. 1473
Author(s):  
Lopamudra Naik
Keyword(s):  
Reaction Time ◽  
Reaction Times ◽  
Relaxation Technique ◽  
Time Interval ◽  
Age Group ◽  
Human Beings ◽  
Visual Reaction Time ◽  
Visual Reaction ◽  
Auditory Reaction Time ◽  
To Receive

Background: Human beings receive various types of stimuli in day to day life and respond to them accordingly. The time taken to receive a stimulus, it's processing and giving a response is different for every individual at minute level, in milliseconds. This time interval is called reaction time. Various yogic practices are found to influence the Reaction Time of individuals. Aim of the work was to evaluate the immediate effect of deep relaxation technique on auditory and visual reaction time.Methods: Auditory and visual reaction times have been measured using simple reaction time tasks in Inquisit software (version 4.0.10.0). 115 healthy yoga students from SVYASA Yoga university, between the age group of 20 to 50 years were taken for the study. Pre and post measurements of auditory reaction time and visual reaction time was done.10 minutes of pre-recorded DRT was given as intervention and immediately after that reaction times were measured.Results: There was a significant decline in the ART and VRT observed in the Post DRT condition. Statistical analysis was carried out using JASP software.Conclusions: The significant decrease in Auditory and Visual Reaction Time shows that DRT helps to increase the awareness and attention of individuals. 

scholarly journals The Development a New Device to Measure of Audial and Visual Reaction Time in Hand and Foot (Validity and Reliability Study)

2019 ◽  
Vol 12 (4) ◽  
pp. 165
Author(s):  
Ozturk AGIRBAS ◽  
Eser AGGON ◽  
Recep OZ
Keyword(s):  
Reaction Time ◽  
Reaction Times ◽  
Repeated Measurements ◽  
T Test ◽  
Measurement Tool ◽  
Validity And Reliability ◽  
New Device ◽  
Significant Difference ◽  
Visual Reaction ◽  
Hands And Feet

The determining the reaction time is a widely used as an indicator in sportive performance and field of exercise physiology. The purpose of this study is to develop a new reaction times device (NRTD) to determine both hand and foot visual and auditory reaction times, which is practical and economical. In the developed system to be obtained are kept in a database which is all necessary the intervals between stimuli for the reaction variable and all records. The system consists of software loaded on a computer and buttons specially prepared for hands and feet. The buttons are designed for precise measurement. The software of the program is written with Visual Basic program. The program can be recorded different features separately for each subject in the database except the reaction times. Also the system metrics can be presentedas a report to the user. While comparisons were made with the Newtest 1000 reaction device to determine the validity of the tool we developed, repeated measurements were made on the same group each week to determine its reliability. Measurements were carried out on 52 male students studying in Erzincan University's School of Physical Education and Sports. The resulting data were examined in SPSS 22.0 statistical package program for Windows. Independent Student T-test was used to compare two devices; Paired Sample T-test was used to compare repeated measurements of NRTD. No significant difference was detected statistically between neither right nor left-hand visual reaction times conducted with the device we have developed and Newtest 1000, or the repeated measurement results which were conducted each week with NRTD. It was concluded that NRTD is valid and reliable to measure reaction time and is an ideal measurement tool to measure both hand and foot reaction times.

Visual reaction time of cats to different spatial frequencies

1990 ◽  
Vol 5 (6) ◽  
pp. 557-564 ◽  
Author(s):  
Bonnie E. Aiken ◽  
Michael S. Loop
Keyword(s):  
Reaction Time ◽  
Spatial Frequency ◽  
Reaction Times ◽  
Sine Wave ◽  
Contrast Threshold ◽  
Visual Reaction Time ◽  
Spatial Frequencies ◽  
Visual Reaction ◽  
X Cells ◽  
Y Cells

AbstractIf physiological mechanisms similar to cat Y and X cells explain faster detection of low spatial frequencies by humans, then cats should show the same effect. We have tested this prediction by determining the visual reaction time of cats over a range of spatial frequencies and contrasts by training them to respond quickly when a vertical sine-wave grating was presented. At 50% contrast, the cat's visual reaction time increased monotonically from 0.25–2.0 cpd (cycle/deg). At every spatial frequency tested, the cat's reaction time increased monotonically as contrast decreased. By determining contrast threshold (70% detection) at each spatial frequency, it was possible to determine reaction times for different spatial frequencies at equal physical contrasts and equal “threshold equivalent” contrasts. Some of the cat's faster detection of low spatial frequencies was due to sensitivity differences and some was not. To determine if faster detection of low spatial frequencies was based upon Y cells, we took advantage of the fact that Y cells show a strong peripheral effect while X cells do not. Low and high spatial frequencies were detected in the presence of a flickering (7 Hz) or steady (70 Hz) surround. Surround frequency had no effect upon reaction times to 2.0 cpd but the flickering surround increased reaction times to 0.25 cpd. These results indicate that, in cats, rapid detection of low spatial frequencies is by Y cells and slower detection of high spatial frequencies is by X cells.

TO STUDY THE RELATION BETWEEN BODY MASS INDEX AND MENSTRUAL PROBLEMS AND THEIR EFFECT ON AUDIOVISUAL REACTION TIME IN YOUNG FEMALES.

2021 ◽  
pp. 14-16
Author(s):  
Manu Saini ◽  
Mamta Mamta ◽  
Ruchi Agrawal ◽  
Sweta Soni
Keyword(s):  
Body Mass Index ◽  
Reaction Time ◽  
Menstrual Cycle ◽  
Body Mass ◽  
Reaction Times ◽  
Young Female ◽  
Visual Reaction Time ◽  
Young Females ◽  
Visual Reaction ◽  
Auditory Reaction Time

Background: Menstruation is an important part of female reproductive cycle. Menstrual problems can affect the normal life of adolescent and young women. Many factors play a role in regulation of normal menstruation like genetic, hormonal factors and Body Mass Index. Reaction time is the time taken by an individual to react to a stimulus. It is an indirect index of processing capabilities of the Central Nervous System and is affected by various factors. Aims & Objective: The present study was undertaken to see the relation between Body Mass Index and menstrual abnormalities and effect on Auditory and Visual reaction time in healthy young females (16-19 yrs.) with the help of Audiovisual reaction time apparatus. Method: 90 young female medical and paramedical students from Mahatma Gandhi Medical College, Jaipur, were selected for this study. A questionnaire was given to them regarding the menstrual status and any abnormalities in menstrual cycle. Students were divided into 3 groups according to their body mass index:- Group 1:- Normal(BMI 18.5 – 24.99 kg/m ), Group 2:- Underweight (BMI < 18.5 kg/m ), Group 3:- 2 2 Overweight (BMI > 25 kg/m ). The reaction times were then noted by audiovisual reaction timer. It was observed that students with 2 Results: High or Low BMI were more likely to have an excessive amount of blood ow and long interval between menstrual cycle as compared to normal BMI group . Auditory Reaction Time (ART) and Visual Reaction Time (VRT) were assessed by using one – way ANOVAwith post – hoc Tukey's HSD test. Both Auditory Reaction Time and Visual Reaction Time were prolonged and highly signicant (p<0.0001) in underweight and overweight female groups in comparison to the normal BMI group. Conclusion: Thus Body Mass Index affects the normal menstrual cycle and the Audio-visual reaction time. Adolescent girls should have a healthy and balanced lifestyle to maintain normal BMI and menstrual cycle.

Visual Reaction Time and High-Speed Ball Games

Perception ◽  
1987 ◽  
Vol 16 (1) ◽  
pp. 49-59 ◽  
Author(s):  
Peter McLeod
Keyword(s):  
Reaction Time ◽  
Visual Information ◽  
High Speed ◽  
Reaction Times ◽  
Perceptual System ◽  
Visual Reaction Time ◽  
Skilled Professional ◽  
Visual Reaction ◽  
High Speed Film ◽  
Laboratory Measures

Laboratory measures of visual reaction time suggest that some aspects of high-speed ball games such as cricket are ‘impossible’ because there is insufficient time for the player to respond to unpredictable movements of the ball. Given the success with which some people perform these supposedly impossible acts, it has been assumed by some commentators that laboratory measures of reaction time are not applicable to skilled performers. An analysis of high-speed film of international cricketers batting on a specially prepared pitch which produced unpredictable movement of the ball is reported, and it is shown that, when batting, highly skilled professional cricketers show reaction times of around 200 ms, times similar to those found in traditional laboratory studies. Furthermore, professional cricketers take roughly as long as casual players to pick up ball flight information from film of bowlers. These two sets of results suggest that the dramatic contrast between the ability of skilled and unskilled sportsmen to act on the basis of visual information does not lie in differences in the speed of operation of the perceptual system. It lies in the organisation of the motor system that uses the output of the perceptual system.

Sign in / Sign up

Export Citation Format

Share Document