Effect of Environmental Extremes on Task Performance Time

1974 ◽  
Vol 18 (4) ◽  
pp. 465-470
Author(s):  
Frederick W. Trabold ◽  
Daniel B. Jones
Keyword(s):  
Light Intensity ◽  
Task Performance ◽  
Time Increase ◽  
Motor Tasks ◽  
Cold Night ◽  
Performance Time ◽  
Median Increase ◽  
Environmental Extremes ◽  
Hand Eye Coordination ◽  
Motor Tests

An experiment was conducted to compare times required to complete a sample of motor tasks typical of routine maintenance actions under the following five environmental conditions: Ambient Shirtsleeve (72°F), Hot Day (110°F), Hot Night (80°F), Cold Day (-25°F) and Cold Night (-25°F). The results of the experiment using eight subjects indicated that 1) No increase in time was needed to complete the 15 motor tests in the hot day environment over the time to complete the same tests in the shirtsleeve weather. 2) A median increase of six percent was required to complete the tests in the hot night conditions. Time increases of 20 to 30 percent were observed for those tasks which required more finite hand-eye coordination and higher light intensity. 3) An increase of 17 percent in time was noted to complete the tasks in the cold day environment. Those tests requiring high motor skill level were more effected than those which required less psychomotor coordination. 4) Test performed in the cold night required a median time increase of 48 percent over the shirtsleeve environment; 14 of the 15 tests completed showed a significant increase in time for completion.

scholarly journals Viewpoint Usability for Desktop Augmented Reality

2006 ◽  
Vol 5 (3) ◽  
pp. 33-39 ◽  
Author(s):  
Seokhee Jeon ◽  
Hyeongseop Shim ◽  
Gerard J. Kim
Keyword(s):  
Augmented Reality ◽  
Task Performance ◽  
Depth Perception ◽  
Object Manipulation ◽  
Head Mounted Display ◽  
Usability Problems ◽  
Head Mounted Displays ◽  
Hand Eye Coordination ◽  
Manipulation Task ◽  
Perceived Usability

In this paper, we have investigated the comparative usability among three different viewing configurations of augmented reality (AR) system that uses a desktop monitor instead of a head mounted display. In many cases, due to operational or cost reasons, the use of head mounted displays may not be viable. Such a configuration is bound to cause usability problems because of the mismatch in the user's proprioception, scale, hand eye coordination, and the reduced 3D depth perception. We asked a pool of subjects to carry out an object manipulation task in three different desktop AR set ups. We measured the subject's task performance and surveyed for the perceived usability and preference. Our results indicated that placing a fixed camera in the back of the user was the best option for convenience and attaching a camera on the user�s head for task performance. The results should provide a valuable guide for designing desktop augmented reality systems without head mounted displays

Assessing Cognitive Workload Metrics for Evaluating Telecommunication Tasks

1997 ◽  
Vol 41 (1) ◽  
pp. 325-329
Author(s):  
Leslie A. Whitaker ◽  
Jennifer Hohne ◽  
Deborah P. Birkmire-Peters
Keyword(s):  
Task Performance ◽  
Spatial Ability ◽  
Cognitive Workload ◽  
Team Members ◽  
Assessment Technique ◽  
Face To Face ◽  
Performance Time ◽  
Telecommunication Technology ◽  
Nasa Tlx ◽  
Four Levels

Telecommunication technology provides the potential for teamwork across distances. In this way, geographically separated team members can communicate electronically to solve problems. An experiment was conducted to test the sensitivity of three cognitive workload metrics to tasks performed under conditions of telecommunication vs. face-to-face communication. Twenty-three teams participated as subjects. A block puzzle pattern task was tested at four levels of puzzle difficulty under the two communication conditions. Task performance (time to complete and errors), as well as cognitive workload ratings were measured. Three workload metrics [Subjective Workload Assessment Technique (SWAT), NASA-TLX, and Modified Cooper Harper (MCH)] were compared. Each person's spatial ability was assessed using the Cognitive Laterality Battery. Both performance and workload varied as a function of puzzle difficulty. While all workload metrics were able to discriminate amongst some of the puzzle difficulty levels, SWAT had the two advantages of providing the most sensitive measure of difficulty plus a wider range of workload ratings.

scholarly journals No impact of instructions and feedback on task integration in motor learning

2020 ◽  
Author(s):  
Harald Ewolds ◽  
Laura Broeker ◽  
Rita F. de Oliveira ◽  
Markus Raab ◽  
Stefan Künzell
Keyword(s):  
Task Performance ◽  
Dual Task ◽  
Reaction Time Task ◽  
Tracking Task ◽  
High Pitch ◽  
Motor Tasks ◽  
Dual Tasks ◽  
Single Task ◽  
Dual Task Performance ◽  
Improved Performance

Abstract This study examined the effect of instructions and feedback on the integration of two tasks. Task-integration of covarying tasks are thought to help dual-task performance. With complete task integration of covarying dual tasks, a dual task becomes more like a single task and dual-task costs should be reduced as it is no longer conceptualized as a dual task. In the current study we tried to manipulate the extent to which tasks are integrated. We covaried a tracking task with an auditory go/no-go task and tried to manipulate the extent of task-integration by using two different sets of instructions and feedback. A group receiving task-integration promoting instructions and feedback (N = 18) and a group receiving task-separation instructions and feedback (N = 20) trained on a continuous tracking task. The tracking task covaried with the auditory go/no-go reaction time task because high-pitch sounds always occurred 250 ms before turns, which has been demonstrated to foster task integration. The tracking task further contained a repeating segment to investigate implicit learning. Results showed that instructions, feedback, or participants’ conceptualization of performing a single task versus a dual task did not significantly affect task integration. However, the covariation manipulation improved performance in both the tracking and the go/no-go task, exceeding performance in non-covarying and single tasks. We concluded that task integration between covarying motor tasks is a robust phenomenon that is not influenced by instructions or feedback.

Cognitive Task Performance Time During Tracking

1981 ◽  
Vol 25 (1) ◽  
pp. 576-580
Author(s):  
David M. Ings ◽  
James R. Buck
Keyword(s):  
Task Performance ◽  
Cognitive Task ◽  
Cognitive Tasks ◽  
Time Variability ◽  
Tracking Accuracy ◽  
Research Support ◽  
Time System ◽  
Performance Time ◽  
Cognitive Task Performance ◽  
Task Types

This study was a test on the feasibility of creating a synthetic time system for cognitive tasks performing during flying. Four types of cognitive tasks were employed (coding, verifying, calculating, and identifying; each at two levels of complexity). Compensatory tracking was performed at two levels of difficulty where RMS statistics were taken within and between the discrete cognitive tasks. The task types and complexity levels were found to significantly affect the performance time (accounting for about 50% of the time variability) and the tracking accuracy. However tracking accuracy was also affected by other factors. Results of this research support the feasibility of a synthetic time system for the class of tasks.

scholarly journals Reliability and Accuracy of Batak Lite Tests Used for Assessing Coordination Motor Abilities in Wrestlers

2014 ◽  
Vol 21 (2) ◽  
pp. 72-76 ◽  
Author(s):  
Dariusz Gierczuk ◽  
Zbigniew Bujak
Keyword(s):  
Diagnostic Accuracy ◽  
Temporal Orientation ◽  
Motor Tasks ◽  
Training Experience ◽  
Motor Abilities ◽  
Greco Roman ◽  
Accuracy Criterion ◽  
Motor Tests ◽  
Validity Criteria ◽  
Spatio Temporal

Abstract Introduction. The aim of this work was to assess selected validity criteria of motor tasks included in Batak Lite. The tasks are used to control coordination motor abilities in athletes of different sports. Material and methods. Twenty male Greco-Roman wrestlers from the sports school SMS in Radom were included in the study. They were 17-18 years of age and their training experience was 4-7.5 years long. The validity of motor tasks was determined on the basis of two criteria, i.e. reliability and diagnostic accuracy. To define the reliability of the tests, the research was carried out twice with an interval of 5-7-days (test-retest). Diagnostic accuracy of selected indices was determined with the help of three main criteria. The analysis included 6 motor tasks performed with the use of Batak Lite. Results. Tests I, II, IV and V are characterised by reliability coefficients higher than 0.50 and, regardless of the assumed accuracy criterion, by coefficients higher than 0.30. Thus, they meet the validity requirements within the assessed criteria. The highest accuracy coefficients were observed in motor tests assessing quick reaction (r = 0.46-0.63), simple reaction including sensory (r = 0.61-0.78), motor (r = 0.33-0.46) and complex (r = 0.34-0.49) reactions as well as spatio-temporal orientation (r = 0.33-0.49) and movement coupling (r = 0.34-0.49). Conclusions. Four Batak Lite tests displayed sufficient reliability and diagnostic accuracy. Therefore, they can be implemented in the training process of wrestlers. The strongest correlation was noted between Batak Lite tests and motor tests that assessed quick reaction, spatio-temporal orientation and movement coupling.

Prediction of Kindergarteners' Behavior on Metropolitan Readiness Tests from Preschool Perceptual and Perceptual-Motor Performances: A Validation Study

1981 ◽  
Vol 52 (3) ◽  
pp. 899-902 ◽  
Author(s):  
David E. Belka
Keyword(s):  
Multiple Regression ◽  
Cognitive Performance ◽  
Validation Study ◽  
Auditory Perception ◽  
Predictive Power ◽  
Cognitive Achievement ◽  
Regression Equations ◽  
Motor Tasks ◽  
High Predictive Power ◽  
Motor Tests

Multiple regression equations were generated to predict cognitive achievement for 40 children (ages 57 to 68 mo.) 1 yr. after administration of a battery of 6 perceptual and perceptual-motor tests to determine if previous results from Toledo could be replicated. Regression equations generated from maximum R2 improvement techniques indicated that performance at prekindergarten is useful for prediction of cognitive performance (total score and total score without the copying subtest on the Metropolitan Readiness Tests) 1 yr. later at the end of kindergarten. The optimal battery included scores on auditory perception, fine perceptual-motor, and gross perceptual-motor tasks. The moderate predictive power of the equations obtained was compared with high predictive power generated in the Toledo study.

scholarly journals THE PREVALENCE OF FOOT DEFORMITIES IN ATHLETES WITH VARIOUS SPORTS BACKGROUNDS

2021 ◽  
pp. 667
Author(s):  
Nikola Prvulović ◽  
Ana Lilić ◽  
Miljan Hadžović
Keyword(s):  
Task Performance ◽  
Review Paper ◽  
Motor Task ◽  
Decisive Role ◽  
Foot Deformities ◽  
Motor Tasks ◽  
Research Papers ◽  
Flat Feet ◽  
The Subject ◽  
Reaction Speed

Changes and deformities to the feet are frequent among athletes. The aim of this review paper is to determine the prevalence of foot deformities among athletes with various backgrounds, as well as to determine the influence of the deformities on motor task performance. The compiled studies were published between 2002 and 2018. The following electronic databases were used for the search: PubMed, MEDLINE, Google Scholar, EBSCO. The identified studies had to satisfy the following criteria: that they included athletes and that the subject of analysis were the differences in foot deformities in relation to performing motor tasks. Research papers on this topic were reviewed and analyzed. They are clearly organized in tabular form, with a clear outline of the details of the research. The results of 16 research papers are summed up. The most prevalent deformity among athletes is flat feet (pes planus). The studies indicate the various deformities which are prevalent in particular sports, and determine the changes in the feet of the athletes, in particular for the foot which plays a decisive role in certain sports. Individuals with flat feet scored lower results compared to individuals with normal arches in terms of time and reaction speed when performing motor tasks.

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