Simple Reaction Times for Mentally Retarded and Epileptic Individuals

1981 ◽  
Vol 52 (3) ◽  
pp. 1007-1010 ◽  
Author(s):  
Christine F. Summerford
Keyword(s):  
Reaction Time ◽  
Simple Reaction Time ◽  
Reaction Times ◽  
Mentally Retarded ◽  
Testing Apparatus ◽  
Simple Reaction ◽  
Response Stimulus ◽  
Significant Difference ◽  
Aged Subjects ◽  
Educable Mentally Retarded

A comparison was made to determine the effect of epilepsy on simple reaction time among 57 school-aged subjects. The subjects were classified intellectually as average, educable mentally retarded, or trainable mentally retarded, and neurologically as epileptic or nonepileptic. Following an explanation of the testing apparatus, 24 trials per day for five consecutive afternoons were given. The microswitch was depressed after a warning light and a foreperiod activated an audio response stimulus. A significant difference in RT was not found between subjects with epilepsy and those without epilepsy within each intellectual classification.

scholarly journals Manipulations of the Response-Stimulus Intervals as a Factor Inducing Controlled Amount of Reaction Time Intra-Individual Variability

2021 ◽  
Vol 11 (5) ◽  
pp. 669
Author(s):  
Paweł Krukow ◽  
Małgorzata Plechawska-Wójcik ◽  
Arkadiusz Podkowiński
Keyword(s):  
Reaction Time ◽  
Simple Reaction Time ◽  
Reaction Times ◽  
Reaction Time Task ◽  
Assessment Method ◽  
Individual Variability ◽  
Simple Reaction Time Task ◽  
Stimulus Interval ◽  
Simple Reaction ◽  
Response Stimulus

Aggrandized fluctuations in the series of reaction times (RTs) are a very sensitive marker of neurocognitive disorders present in neuropsychiatric populations, pathological ageing and in patients with acquired brain injury. Even though it was documented that processing inconsistency founds a background of higher-order cognitive functions disturbances, there is a vast heterogeneity regarding types of task used to compute RT-related variability, which impedes determining the relationship between elementary and more complex cognitive processes. Considering the above, our goal was to develop a relatively new assessment method based on a simple reaction time paradigm, conducive to eliciting a controlled range of intra-individual variability. It was hypothesized that performance variability might be induced by manipulation of response-stimulus interval’s length and regularity. In order to verify this hypothesis, a group of 107 healthy students was tested using a series of digitalized tasks and their results were analyzed using parametric and ex-Gaussian statistics of RTs distributional markers. In general, these analyses proved that intra-individual variability might be evoked by a given type of response-stimulus interval manipulation even when it is applied to the simple reaction time task. Collected outcomes were discussed with reference to neuroscientific concepts of attentional resources and functional neural networks.

scholarly journals An evaluation of bicycle-specific agility and reaction times in mountain bikers and road cyclists

2020 ◽  
Vol 32 (1) ◽  
pp. 1-5
Author(s):  
Kim Buchholtz ◽  
Theresa Burgess
Keyword(s):  
Reaction Time ◽  
Choice Reaction Time ◽  
Simple Reaction Time ◽  
Reaction Times ◽  
Common Mechanism ◽  
Cross Sectional ◽  
Simple Reaction ◽  
Cognitive Arousal ◽  
Significant Difference ◽  
Study Participants

Background: Cycling is a popular recreational and competitive sport with many health benefits but also significant risks, with 85% of recreational cyclists reporting an injury each season. The most common mechanism of injury is through a loss of control of the bicycle, and collisions with other objects. Reaction time and agility in cyclists may contribute to the ability to control a bicycle. Objectives: To evaluate bicycle-specific agility and reaction time in cyclists. Methods: The study was a cross-sectional observational study. Thirty-five cyclists (27 males, eight females) participated in this study. Participants attended a single testing session where they completed a bicycle-specific agility test, and online simple and choice reaction time testing while cycling at three different exercise intensities. Results: There was a significant difference in agility between males and females (p=0.01). There was also a significant difference in choice reaction time between cycling at ‘light’ and ‘very hard’ intensities (p=0.004), and a significant positive relationship between agility and simple reaction time at a ‘hard’ intensity. Discussion: Choice reaction time improved at ‘very hard’ cycling intensity, supporting the theory that increased exercise intensity improves cognitive arousal. This reaction time may be essential as a means to avoid collisions and falls from bicycles. Bicycle-specific agility appears to be related to simple reaction time, but there are no existing validated bicycle-specific agility tests available. The value of the tests undertaken by the authors needs to be assessed further. Conclusion: Choice reaction time was significantly decreased in high intensity cycling compared to cycling at low intensities. Further prospective studies are needed to establish links between reaction times and bicycle-specific agility.

Influences of Respiratory Cycle on Simple Reaction Time

1965 ◽  
Vol 20 (3) ◽  
pp. 961-966 ◽  
Author(s):  
Monte Buchsbaum ◽  
Enoch Callaway
Keyword(s):  
Reaction Time ◽  
Spontaneous Breathing ◽  
Simple Reaction Time ◽  
Reaction Times ◽  
Respiratory Cycle ◽  
Simple Reaction ◽  
Warning Light ◽  
Respiratory Phase ◽  
Auditory Reaction Time ◽  
Phase Data

The effect of respiration on simple auditory reaction time was studied. In the first study, reaction times and respiratory phase data were collected during spontaneous breathing; in Study 2, a warning light signaled S to hold his breath in either inspiration or expiration. Both experiments showed faster reaction times with expiration. This is contradictory to reaction time findings reported by other investigators who have studied effects of respiration.

scholarly journals Evaluating the Recovery Curve for Clinically Assessed Reaction Time After Concussion

2017 ◽  
Vol 52 (8) ◽  
pp. 766-770 ◽  
Author(s):  
Gianluca Del Rossi
Keyword(s):  
High School ◽  
Reaction Time ◽  
Athletic Training ◽  
Simple Reaction Time ◽  
Reaction Times ◽  
High School Athletes ◽  
Time Intervals ◽  
Simple Reaction ◽  
Baseline Levels ◽  
Clinical Measures

Context:  A change in reaction time is one of various clinical measures of neurocognitive function that can be monitored after concussion and has been reported to be among the most sensitive indicators of cognitive impairment. Objective:  To determine the timeline for clinically assessed simple reaction time to return to baseline after a concussion in high school athletes. Design:  Observational study. Setting:  Athletic training room. Patients or Other Participants:  Twenty-one high school-aged volunteers. Intervention(s):  Participants completed 8 trials of the ruler-drop test during each session. Along with baseline measures, a total of 6 additional test sessions were completed over the course of 4 weeks after a concussion (days 3, 7, 10, 14, 21, and 28). Main Outcome Measure(s):  The mean reaction times calculated for all participants from each of the 7 test sessions were analyzed to assess the change in reaction time over the 7 time intervals. Results:  After a concussion and compared with baseline, simple reaction time was, on average, 26 milliseconds slower at 48 to 72 hours postinjury (P < .001), almost 18 milliseconds slower on day 7 (P < .001), and about 9 milliseconds slower on day 10 (P < .001). Simple reaction time did not return to baseline levels until day 14 postinjury. Conclusions:  Clinically assessed simple reaction time appeared to return to baseline levels within a timeframe that mirrors other measures of cognitive performance (approximately 14 days).

Study of Neuromotor Reaction Times under the Influence of Thyrotropin-Releasing Hormone

1987 ◽  
Vol 65 (2) ◽  
pp. 627-636 ◽  
Author(s):  
Dan Repperger ◽  
Tom Jennings ◽  
James Jacobson ◽  
Norman Michel ◽  
Chuck Goodyear ◽  
...  
Keyword(s):  
Reaction Time ◽  
Choice Reaction Time ◽  
Simple Reaction Time ◽  
Reaction Times ◽  
Thyrotropin Releasing Hormone ◽  
Double Blind Study ◽  
Experimental Conditions ◽  
Releasing Hormone ◽  
Simple Reaction ◽  
Decision Choice

Neuromotor reaction times (simple, choice, and decision) were measured when Thyrotropin-releasing hormone (TRH) was administered intravenously to nine healthy men in a double-blind study. Measurements were made of simple reaction time, choice reaction time, and decision time for each subject at various intervals over a 54-hr. period. Given the observed inherent interaction of the drug with the long time used (54 hr.), most analyses were conducted across separate time epochs. Injected subjects showed inhibition in the normal improvement of simple reaction time (which occurs with practice), and they reduced the time required to make a decision. Choice reaction time, however, remained unchanged across the drug-nondrug experimental conditions.

Simple Reaction Times and Timing of Serial Reactions of Adolescents with Mental Retardation, Autism, and down Syndrome

1995 ◽  
Vol 81 (3) ◽  
pp. 739-745 ◽  
Author(s):  
Nobuyuki Inui ◽  
Masah Yamanishi ◽  
Shinji Tada
Keyword(s):  
College Students ◽  
Down Syndrome ◽  
Mental Retardation ◽  
Reaction Time ◽  
Reaction Times ◽  
Mentally Retarded ◽  
Tracking Task ◽  
The Other ◽  
Simple Reaction ◽  
Adolescents With Autism

The purpose of this study was to examine the serial information processing in adolescents with mental retardation, autism, and Down syndrome by using a serially patterned tracking task. Analyses indicated that 7 adolescents with mental retardation, 8 with autism, and 3 with Down syndrome had significantly slower and more variable simple reaction times than did 10 college students. Also, the autistic adolescents had significantly faster mean simple reaction time than those with Down syndrome. On a task of tracking serial light stimulation, mentally retarded adolescents had significantly faster reaction time than college students. The autistic subjects excessively had faster anticipatory reaction times than did the subjects in the other three groups. On the other hand, adolescents with Down syndrome had markedly slower and more variable reaction times than did adolescents with non-Down-syndrome mental retardation. As for motor organization of keystrokes on the tracking task, mentally retarded adolescents responded with six movements, in which these individuals pressed a series of keys 1, 2, 3, 4, 5, and 6, as a chunk, as exhibited by college students. Adolescents with autism and Down syndrome, however, did not produce this movement-output chunking.

Gamma oscillations are involved in the sensorimotor transformation of pain

2012 ◽  
Vol 108 (4) ◽  
pp. 1025-1031 ◽  
Author(s):  
Enrico Schulz ◽  
Laura Tiemann ◽  
Viktor Witkovsky ◽  
Paul Schmidt ◽  
Markus Ploner
Keyword(s):  
Reaction Time ◽  
Simple Reaction Time ◽  
Motor Response ◽  
Reaction Times ◽  
Gamma Oscillations ◽  
Simple Reaction Time Task ◽  
Sensorimotor Transformation ◽  
Healthy Human ◽  
Simple Reaction ◽  
The Relationship

Pain signals threat and initiates motor responses to avoid harm. The transformation of pain into a motor response is thus an essential part of pain. Here, we investigated the neural mechanisms subserving the sensorimotor transformation of pain at the cortical level by using electroencephalography. In a simple reaction time experiment, brief painful stimuli were delivered to the left hand of healthy human subjects who responded with button presses of the right hand. The results show that the simple reaction time task was associated with neuronal responses at delta/theta, alpha/beta, and gamma frequencies. The analysis of the relationship between neuronal activity and response speed revealed that gamma oscillations, which were temporally coupled to the painful stimuli, but not temporally coupled to the motor response, predicted reaction times. Lateralization of gamma oscillations indicates that they originate from motor areas rather than from sensory areas. We conclude that gamma oscillations are involved in the sensorimotor transformation of pain whose efficiency they reflect. We hypothesize that the relationship between stimulus-locked gamma oscillations and reaction times reflects a direct thalamo-motor route of nociceptive information that is central to the biological function of pain.

scholarly journals Diurnal Variation in Visual Simple Reaction Time between and within Genders in Young Adults: An Exploratory, Comparative, Pilot Study

2021 ◽  
Vol 2021 ◽  
pp. 1-5
Author(s):  
Hanumantha S ◽  
Ashwin Kamath ◽  
Rajeshwari Shastry
Keyword(s):  
Reaction Time ◽  
Pilot Study ◽  
Simple Reaction Time ◽  
Time Of Day ◽  
Practice Session ◽  
Language Version ◽  
Simple Reaction ◽  
Parallel Group ◽  
Significant Difference ◽  
Time Required

Simple reaction time (SRT) is the minimum time required to respond to a stimulus; it is a measure of processing speed. Our study aimed to determine the variation in visual SRT with time among individuals of the same gender and between genders. We carried out a prospective, parallel group, pilot study involving ten male and ten female medical students aged 18–25 years. After obtaining written informed consent, the participants were familiarized with the procedures, and each completed a single practice session of a computerized visual SRT which was administered using Psychology Experiment Building Language Version 2.0 software. On a predetermined day, the participants completed the exercise at 10 a.m., 1 p.m., and 5 p.m. The results showed no statistically significant difference in SRT based on time of day between genders (χ2(2) = 4.300, p = 0.116 ) as well as within gender (males (χ2(2) = 0.600, p = 0.741 ); females (χ2(2) = 5.000, p = 0.082 ). Our study showed that visual SRT does not change significantly at different times of the day and within and between genders. Intraindividual variations in visual SRT can mask the presence of a small but significant difference; hence, further studies are warranted.

Reaction Times and Derived Information Processing Measures: Limitations of Their Practical Use in Vehicle Operator Screening

1978 ◽  
Vol 22 (1) ◽  
pp. 123-123
Author(s):  
Helmut T. Zwahlen ◽  
Michael L. Baird
Keyword(s):  
Information Processing ◽  
Reaction Time ◽  
Simple Reaction Time ◽  
Reaction Times ◽  
Point Of View ◽  
Simple Reaction ◽  
Rate Difference ◽  
Screening Measure ◽  
Time Averages ◽  
The Difference

The use of information processing rate (difference between the amount of uncertainty in a choice and simple reaction time situation, in bits, divided by the difference of the corresponding reaction time averages, in seconds) as a driver screening measure from a relevance point of view has been suggested by Fergenson (1971).

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