Effect of environmental extremes on task performance time

1974 ◽  
Author(s):  
Frederick W. Trabold ◽  
Daniel B. Jones
Keyword(s):  
Task Performance ◽  
Performance Time ◽  
Environmental Extremes

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.

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.

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.

An Heuristic Approach to Work Analysis

1979 ◽  
Vol 23 (1) ◽  
pp. 554-557
Author(s):  
Robert P. Bateman
Keyword(s):  
Task Performance ◽  
Task Difficulty ◽  
Performance Evaluations ◽  
Secondary Tasks ◽  
Performance Time ◽  
Tracking Tasks ◽  
Tentative Hypothesis ◽  
Weighting Coefficients ◽  
High Degree ◽  
Multiple Task

Nine experienced pilots served as subjects in an experiment designed to evaluate differences between multifunction keyboards by measuring the objective performances of the subjects. In order to achieve a high degree of external (or content) validity, the test was designed to closely simulate a series of tasks that a pilot might encounter during actual flight. Subjects performed tracking tasks and used the keyboards for secondary tasks. Measurements of tracking parameters and of performance time and errors using the keyboards were taken. The results showed that no single variable consistently reflected changes in task difficulty. The observed tendency of subjects to employ different, changing strategies during the multiple task performance led to a tentative hypothesis that work was a composite of all of the parameters. A regression analysis was used to develop an equation with weighting coefficients for the parameters. The equation was found to be in agreement with subjective performance evaluations.

Cognitive Task Performance Time And Accuracy In Supervisory Process Control

1988 ◽  
Vol 20 (2) ◽  
pp. 122-131
Author(s):  
J. R. BUCK ◽  
N. B. BADARINATH ◽  
V. KACHITVICHYANUKUL
Keyword(s):  
Process Control ◽  
Task Performance ◽  
Cognitive Task ◽  
Performance Time ◽  
Cognitive Task Performance ◽  
Supervisory Process

Feedback Frequency Effect on Performance Time in Dynamic Decision Making Task

2017 ◽  
Vol 61 (1) ◽  
pp. 188-192
Author(s):  
Nakkyeong Choi ◽  
Rohae Myung
Keyword(s):  
Decision Making ◽  
Performance Evaluation ◽  
Task Performance ◽  
Dynamic Decision Making ◽  
Frequency Effect ◽  
Performance Time ◽  
Successful Work ◽  
Activation Theory ◽  
And Performance ◽  
Feedback Frequency

Decision support such as feedback has been considered to be crucial for successful work in many important Dynamic Decision Making (DDM) tasks. However, previous research did not consider the effect of feedback frequency on the performance time which, in conjunction with accuracy, is an important measure of the task performance evaluation in DDM. Therefore, in order to accurately evaluate task performance in a DDM, not only the accuracy of performance, but also the time to perform the task should be considered. This paper will examine the effect of feedback frequency on the task performance time in DDM. Drawing from activation theory (Anderson, 2009), we hypothesized that frequent feedback induces cognitive overload, resulting in learning degradation, and thus producing a U-shaped relationship with performance time. In order to test this hypothesis, we have experimented with the DDM simulation where the frequency of feedback was manipulated. The results demonstrate that there is U-shaped relationship between feedback frequency and performance time ( R2= 0.746, p < 0.01). Our findings show that providing excessively frequent feedback to an operator negatively affects performance time.

scholarly journals Motor learning in children and adolescents institutionalized in shelters

2017 ◽  
Vol 30 (4) ◽  
pp. 725-732 ◽  
Author(s):  
Caroline Moreira Souza Santos ◽  
Marcela Montovanelli Rodrigues ◽  
Deborah Cristina Gonçalves Luiz Fernani ◽  
Ana Paula Coelho Figueira Freire ◽  
Carlos Bandeira de Mello Monteiro ◽  
...  
Keyword(s):  
Motor Learning ◽  
Children And Adolescents ◽  
Task Performance ◽  
Motor Development ◽  
Control Group ◽  
Performance Time ◽  
Maze Test ◽  
Post Test ◽  
Three Stages ◽  
Experimental Group

Abstract Introduction: Children and adolescents living in shelters may present with impaired motor development, cognitive function, as well as speech and understanding; psychological alterations; and hyperactivity. All of these factors may be detrimental to motor learning. Objective: To investigate motor learning in children and adolescents living in shelters, and to compare it with that of individuals living in a family context. Methods: We assessed 36 individuals who were divided into groups: an experimental group, composed of institutionalized children and adolescents (EG, n=18), and a control group (CG, n = 18) that was matched by age and sex. Motor learning was assessed using a maze test in three stages: acquisition, retention and transfer. The data were analyzed using the Shapiro Wilk, Wilcoxon, Mann Whitney, Kruskal Wallis tests and Dunn’s post-test (p < 5%). Results: The EG had a longer task performance time than the CG. There was a significant reduction in task performance time between the first (EG = 11.05 [8.50-14.85]s; CG:7.65 [5.95-10.23]s) and the last task performance block (EG:8.02 [6.86-10.23]s; GC: 5.50 [4.50-6.82]s) in both groups. When comparing the variables of the last acquisition (GE:8.02[6.86-10.23]s; GC: 5.50[4.50-6.82]s), retention (GE:8.20[7.09-9.89]s;GC:5.35[4.50-6.22]s) and transfer blocks (GE:8.30[6.28-11.43]s; GC:5.30[4.90-6.82]s) in each group, we found no changes in task performance time between test batteries. Conclusion: Individuals living in shelters showed a motor learning deficit, as evidenced by longer task performance time when compared to their controls. Nevertheless, both groups performed the task in a similar manner.

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