Timing Responses of Children with Spina Bifida Having Varying Ambulatory Abilities

1991 ◽  
Vol 73 (3) ◽  
pp. 919-928 ◽  
Author(s):  
Christina Evaggelinou ◽  
John N. Drowatzky
Keyword(s):  
Reaction Time ◽  
Spina Bifida ◽  
Repeated Measures ◽  
Movement Time ◽  
Upper Extremities ◽  
Educational Approach ◽  
Motor Processing ◽  
Maximum Benefit ◽  
Processing Abilities ◽  
Simple Movement

The authors investigated the timing responses of upper extremities to light and sound stimuli of 24 ambulatory, household-only ambulatory, and nonambulatory children with spina bifida. Using a Lafayette reaction and movement timer, each subject performed four timing tasks: (a) simple reaction time, (b) choice reaction time, (c) simple movement time, and (d) choice movement time. A 2 × 3 × 4 analysis of variance with repeated measures indicated that the ambulatory spina bifida children performed all timing tasks faster and more accurately than the household-only ambulatory and nonambulatory children. In addition, the household-only ambulatory group performed the timing tasks faster and more accurately than the nonambulatory group. Therefore, different perceptual-motor processing abilities are inferred for children with spina bifida who ambulate with different ability. For maximum benefit, an individualized educational approach should be used to improve psychomotor abilities of spina bifida children who have differing levels of ambulation.

An Exploratory Study of Perceptual-Motor Abilities of Women: Novice and Skilled Players of Team Handball

1998 ◽  
Vol 86 (1) ◽  
pp. 279-288 ◽  
Author(s):  
Ronnie Lidor ◽  
Ester Argov ◽  
Sharon Daniel
Keyword(s):  
Reaction Time ◽  
Motor Activity ◽  
Repeated Measures ◽  
Exploratory Study ◽  
Movement Time ◽  
Random Order ◽  
Order Reaction ◽  
Motor Abilities ◽  
Team Handball ◽  
Anticipation Time

Comparisons of ability between skilled performers and novices have been made for activities such as basketball, volleyball, tennis, squash, and badminton, but there is little work on team-handball which is not a well-recognized sport in North America. To examine a variety of perceptual, e.g., anticipation time, reaction time, and motor, e.g., throwing tasks, abilities of skilled and novice female team-handball players 13 First Division (skilled) and 10 recreational (novice) players ( M age = 25.3 yr.) performed 2 laboratory activities (for measurement of anticipation time, reaction time and movement time) and 3 field tasks (for measurement of accuracy and speed of throwing abilities) in random order. Reaction time and movement time were collected during a unique team-handball motor activity. Analyses of variance with repeated measures on trial blocks indicated high mean proficiency for the skilled participants in reaction time and all field-throwing tests compared with the novice participants. These reliable differences in team-handball activities further support superiority in sport settings gained by physical achievements and psychomotor excellence. In other words, skilled female team-handball players threw faster and more accurately and responded more rapidly than novice players.

Optimization of Foot Pedal Placement in Commercial School Buses

1980 ◽  
Vol 24 (1) ◽  
pp. 634-637
Author(s):  
Donna J. Sexton ◽  
Rodger J. Koppa
Keyword(s):  
Reaction Time ◽  
Public School ◽  
Human Factors ◽  
Choice Reaction Time ◽  
Movement Time ◽  
Vertical Separation ◽  
School Buses ◽  
Operator Performance ◽  
Simple Movement ◽  
Female Subjects

On the basis of results obtained in recent studies of foot pedal placement as well as specifications found in human factors guidelines, four different foot pedal configurations were tested for suitability in public school buses. Both simple movement time and choice reaction time measures were taken for ten female subjects on three coplanar arrangements and one configuration with a vertical separation between the accelerator and brake pedals. Results indicate significantly faster brake movement times for all three coplanar arrangements than for the arrangement with a vertical separation between the two pedals. With respect to the coplanar arrangements, brake movement time was significantly faster for the two arrangements with a horizontal separation of 12.0 cm rather than the arrangement with only 8.0 cm of separation. Therefore, it is concluded that operator performance may be significantly improved by providing a coplanar pedal arrangement with approximately 12.0 cm of horizontal separation.

Repeated Measures on a Choice Reaction Time Task

1982 ◽  
Vol 26 (4) ◽  
pp. 359-363 ◽  
Author(s):  
Michele Krause
Keyword(s):  
Reaction Time ◽  
Data Collection ◽  
Choice Reaction Time ◽  
Repeated Measures ◽  
Movement Time ◽  
Reaction Time Task ◽  
Learning Effects ◽  
Current Investigation ◽  
Enlisted Men ◽  
Practice Trials

The current investigation examined a visual choice reaction time (CRT) task to determine its suitability for repeated measures experimentation. Fifteen Navy enlisted men served as subjects for one-, two-, and four-choice reaction time conditions. Fifty trials on each condition were administered for 15 consecutive workdays. Reaction time (RT), movement time (MT), and total time (TT) were recorded for each trial. Results indicated that across all RT conditions, intersession correlations were differentially stable by about Day 8, with reliabilities around .71. Means remained unchanged over the stable days and variances remained constant across all 15 days of the experiment for the RT measure. It was concluded that studies using RT as the dependent variable should allow for sufficient RT practice prior to data collection to ensure that the results are not contaminated by learning effects. It is recommended that at least 1000 practice trials be given prior to using an RT task to assess the effects of an environment.

scholarly journals Effects of Static and Dynamic Stretching on Force Sense, Dynamic Flexibility and Reaction Time of Children

2019 ◽  
Vol 12 (1) ◽  
pp. 22-27
Author(s):  
Dimitris Chatzopoulos ◽  
Georgios Doganis ◽  
Georgios Lykesas ◽  
Nikolaos Koutlianos ◽  
Christos Galazoulas ◽  
...  
Keyword(s):  
Reaction Time ◽  
Repeated Measures ◽  
Movement Time ◽  
Young Male ◽  
Voluntary Contraction ◽  
Warm Up ◽  
Dynamic Stretching ◽  
Force Matching ◽  
Matching Test ◽  
Force Sense

Background: Traditionally, stretching protocols are basic components of warm-up aiming to improve performance and reduce injuries. However, the literature suggests that different stretching protocols during warm-up may have diverse effects on performance. Objective: The purpose of this study was to compare the acute effects of three different stretching protocols on force sense, dynamic flexibility, reaction time and movement time. Methods: The study included twenty-five participants who were TaeKwonDo young male players (age = 11.78 ± 1.66 years.). All the participants performed one of the following protocols on different days: (a) 5 min jogging followed by 3 min Static Stretching (SS), (b) 5 min jogging followed by 3 min Dynamic Stretching (DS), and (c) 5 min jogging followed by 3 min of rest (NS). After the protocols, the participants performed the following measurements: (a) force-matching test at 20% maximal isometric voluntary contraction (force sense), (b) active straight leg raise test (dynamic flexibility) and (c) reaction and movement time test. Results: Repeated measures analysis of variance revealed no significant main effects on force sense. Furthermore, SS performed significantly better in dynamic flexibility in comparison to NS, and DS performed significantly better in terms of dynamic flexibility and movement time compared to SS. Conclusion: According to the results of the study, it seems that force sense is not affected by either SS or DS protocols (30 sec duration per muscle group). Moreover, it seems that DS in the warm-up is more appropriate than SS for activities requiring dynamic flexibility and movement time.

Relationship of Reaction Time and Movement Time in a Gross Motor Skill

1973 ◽  
Vol 36 (2) ◽  
pp. 453-454 ◽  
Author(s):  
Richard Groves
Keyword(s):  
Reaction Time ◽  
Motor Skill ◽  
Movement Time ◽  
Gross Motor ◽  
Moment Coefficient ◽  
Relationship Of ◽  
Gross Motor Skill

The purpose of the study was to investigate the independence of reaction time (RT) and movement time (MT) in a gross motor skill, the racing start in swimming. RT and MT were quantified for each S by counting frames of film for five trials. The Pearson product-moment coefficient of –.231 ( p > .05) between means indicated that RT and MT were independent factors.

Effects of Midline Crossing on Reaction Time and Movement Time with Adolescents Classified as Mildly Mentally Retarded

1993 ◽  
Vol 10 (3) ◽  
pp. 269-280 ◽  
Author(s):  
Bobby L. Eason ◽  
Paul R. Surburg
Keyword(s):  
Factor Analysis ◽  
Mental Retardation ◽  
Reaction Time ◽  
Sensory Integration ◽  
Movement Time ◽  
Assessment Process ◽  
Mild Mental Retardation ◽  
Midline Crossing ◽  
Performance Deterioration ◽  
Temporal Assessment

Students with mild mental retardation (MMR) often demonstrate reluctance, confusion, or performance deterioration when required to perform tasks that require looking, reaching, or stepping across the body’s midline. Sensory integration theorists contend that midline crossing is a predictor of bilateral integration. However, in factor analysis studies, very little variance is accounted for by midline crossing data. The present study viewed midline crossing as a function of information processing and utilized a temporal assessment process rather than the usual spatial assessment process. Results indicated that subjects classified as MMR experienced slower choice reaction time (CRT) and movement time (MT) for stimuli placed across the body’s midline. However, higher functioning subjects with MMR performed equally well on CRT for ipsilateral and crosslateral tasks. The data provide evidence for a developmental hypothesis as an explanation for midline crossing problems.

Test–Retest Reliability, Training, and Detraining Effects Associated With the Dynavision D2™ Mode A Visuomotor Reaction Time Test

2021 ◽  
pp. 1-9
Author(s):  
Adam J. Wells ◽  
Bri-ana D.I. Johnson
Keyword(s):  
Reaction Time ◽  
Repeated Measures ◽  
Intraclass Correlation ◽  
Analysis Of Covariance ◽  
Repeated Testing ◽  
Retest Reliability ◽  
Sports Science ◽  
Test Retest Reliability ◽  
Mode A ◽  
Training And Detraining

Context: The Dynavision D2™ Mode A test (ModeA) is a 1-minute reaction time (RT) test commonly used in sports science research and clinical rehabilitation. However, there is limited data regarding the effect of repeated testing (ie, training) or subsequent periods of no testing (ie, detraining) on test–retest reliability and RT performance. Therefore, the purpose of this study was to examine the test–retest reliability, training, and detraining effects associated with the D2™ ModeA test. Design: Repeated measures/reliability. Methods: Twenty-four recreationally active men and women completed 15 training sessions consisting of 2 ModeA tests per session (30 tests). The participants were then randomized to either 1 or 2 weeks of detraining prior to completing 15 retraining sessions (30 tests). The training and retraining periods were separated into 10 blocks for analysis (3 tests per block). The number of hits (hits) and the average RT per hit (AvgRT) within each block were used to determine RT performance. Intraclass correlation coefficients, SEM, and minimum difference were used to determine reliability. Repeated-measures analysis of variance/analysis of covariance were used to determine training and detraining effects, respectively. Results: The ModeA variables demonstrated excellent test–retest reliability (intraclass correlation coefficient2,3 > .93). Significant improvements in hits and AvgRT were noted within training blocks 1 to 5 (P < .05). No further improvements in RT performance were noted between training blocks 6 through 10. There was no effect of detraining period on RT. The RT performance was not different between blocks during retraining. Conclusions: It appears that 15 tests are necessary to overcome the training effect and establish reliable baseline performance for the ModeA test. Detraining for 1 to 2 weeks did not impact RT performance. The authors recommend that investigators and clinicians utilize the average of 3 tests when assessing RT performance using the D2 ModeA test.

Reduction of Reaction Time Preceding Increased Complexity of Movement

1992 ◽  
Vol 74 (3) ◽  
pp. 819-824 ◽  
Author(s):  
Bruce Etnyre
Keyword(s):  
Reaction Time ◽  
Auditory Stimulus ◽  
Movement Time ◽  
Movement Response ◽  
Initiation Phase ◽  
Response Alternatives

In 1960 Henry and Rogers reported reaction time (RT) increased with increased response complexity while response alternatives were held constant. The purpose of the present study was to observe the effects of RT and movement time (MT) when subjects attempted to separate initiation of a task from the subsequent movement response, 24 subjects performed a ball-striking movement in response to an auditory stimulus. In the experimental condition the subjects were instructed to complete initiation as quickly as possible and then make a separate subsequent movement to strike a ball. It was concluded that subjects could not completely separate the initiation phase from the movement phase of the task but could significantly reduce the RT by focusing on the initiation portion of the task.

scholarly journals Evaluation of Aircrew Low-Intensity Threat Laser Eye Protection

2019 ◽  
Vol 184 (Supplement_1) ◽  
pp. 593-603 ◽  
Author(s):  
Michael D Reddix ◽  
Matthew E Funke ◽  
Micah J Kinney ◽  
John L Bradley ◽  
Greg Irvin ◽  
...  
Keyword(s):  
Reaction Time ◽  
Color Vision ◽  
Repeated Measures ◽  
Reaction Time Task ◽  
Coast Guard ◽  
Night Vision ◽  
Light Sources ◽  
Eye Protection ◽  
Low Intensity ◽  
Color Symbol

Abstract Prototype low-intensity threat laser eye protection (LIT-LEP) spectacles were evaluated for US Coast Guard (USCG) cockpits and night vision goggle compatibility. The impetus for interest in aviation LIT-LEP is driven in part by the fact that easily accessible 0.5–2.0 W high-power laser pointers exceed safety standards for direct on-axis viewing. A repeated-measures experimental design was used to assess LIT-LEP performance relative to a no-LEP control for the following tasks: Near- and far contrast acuity, night vision goggle far-contrast acuity, emissive and non-emissive light source color-vision screening, and USCG multifunctional display color symbol discrimination reaction time and accuracy. Near- and far-contrast acuity results demonstrated good LIT-LEP performance for typical in- and out-of-cockpit lighting conditions. Night vision goggle performance suffered marginally at only one contrast level (85%; 20/30 acuity line). Color vision test results showed good color balance in that S-, M-, and L-cone performance did not demonstrate a clinical diagnostic color defect for emissive or non-emissive light sources when wearing LIT-LEP. Color symbol discrimination reaction-time-task results based on inverse efficiency scores revealed that some non-primary flight display colors exhibited a combination of slower speed and decreased accuracy. The findings will contribute to an acquisition decision as well as guide future LEP designs.

scholarly journals Targeting in Virtual Workspaces: motor learning consolidates spatial memory for performance clusters

2019 ◽  
Author(s):  
Bradly Alicea ◽  
Corey Bohil ◽  
Frank Biocca ◽  
Charles Owen
Keyword(s):  
Repeated Measures ◽  
Target Location ◽  
Movement Time ◽  
Three Dimensional ◽  
Arm Movement ◽  
Hierarchical Cluster ◽  
Movement Speed ◽  
Advantages And Disadvantages ◽  
Training Interval ◽  
Speed And Accuracy

Our objective was to focus on linkages between the process of learning and memory and the placement of objects within an array of targets in a virtual workspace. Participants were instructed to place virtual objects serially within a three-dimensional target array. One phase presented each target sequentially, and required participants to make timed ballistic arm movements. The other phase presented all nine targets simultaneously, which required ballistic arm movement towards the correct target location as recalled from the learning phase. Movement time and accuracy were assessed using repeated-measures ANOVA, a hierarchical cluster analysis, and a multiple linear regression. Collectively, this revealed numerous speed and accuracy advantages and disadvantages for various positional combinations. Upper positions universally yielded longer movement times and larger error measurements. Individual ability for mental rotation combined with task learning over a fixed training interval was found to predict accuracy for specific locations. The prediction that location influences movement speed and accuracy was supported, but with some caveats. These results may be particularly useful in the design of instructor stations and other hybrid physical-virtual workspaces.

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