scholarly journals Exploratory information searching in the enterprise: A study of user satisfaction and task performance

2015 ◽  
Vol 68 (1) ◽  
pp. 77-96 ◽  
Author(s):  
Paul H. Cleverley ◽  
Simon Burnett ◽  
Laura Muir
Keyword(s):  
Task Performance ◽  
User Satisfaction ◽  
Information Searching ◽  
And Task

Effects of Display Curvature, Presbyopia, and Task Duration on Visual Fatigue, Task Performance, and User Satisfaction

2018 ◽  
Vol 61 (2) ◽  
pp. 273-287 ◽  
Author(s):  
Donghee Choi ◽  
Gyouhyung Kyung ◽  
Kyunghyun Nam ◽  
Sungryul Park
Keyword(s):  
Task Performance ◽  
User Satisfaction ◽  
Pupil Diameter ◽  
Visual Display ◽  
Curvature Radius ◽  
Visual Fatigue ◽  
Visual Display Terminal ◽  
Task Duration ◽  
The Mean ◽  
And Task

Objective: This study examined the effects of display curvature, presbyopia, and task duration on visual fatigue, task performance, and user satisfaction. Background: Although curved displays have been applied to diverse display products, and some studies reported their benefits, it is still unknown whether the effects of display curvature are presbyopia-specific. Method: Each of 64 individuals (eight nonpresbyopes and eight presbyopes per display curvature) performed four 15-min proofreading tasks at one display curvature radius setting (600R, 1140R, 4000R, and flat; mm). Diverse measurements were obtained to assess visual fatigue, task performance, and user satisfaction. Results: The mean pupil diameter was the largest with 1140R, indicating this curvature radius was associated with the least development of visual fatigue; 600R was comparable with 1140R in terms of pupil diameter. The presbyopic group showed a 28.5% slower proofreading speed compared with the nonpresbyopic group, whereas their proofreading accuracy was comparable. For both groups, the mean visual fatigue increased significantly during the first 15 min of proofreading, as indicated by a decrease of 0.11 mm in the mean pupil diameter, an increase of 3.8 in the mean bulbar conjunctival redness, and an increase of 9.13 in the mean eye complaint questionnaire score. Conclusion: The effect of display curvature was not presbyopia-specific. Low visual fatigue was observed with 1140R and 600R. Application: Display curvature radii near or in the range of 600R and 1140R and frequent breaks are recommended for both presbyopic and nonpresbyopic groups to reduce their visual fatigue due to visual display terminal tasks.

Operational “Feel” Adjustment by Reinforcement Learning for a Power-Assisted Positioning Task

2009 ◽  
Vol 3 (6) ◽  
pp. 671-680 ◽  
Author(s):  
Tetsuya Morizono ◽  
◽  
Yoji Yamada ◽  
Masatake Higashi ◽  
◽  
...  
Keyword(s):  
Reinforcement Learning ◽  
Real Time ◽  
Task Performance ◽  
User Satisfaction ◽  
Learning Algorithm ◽  
Impedance Control ◽  
Experimental Results ◽  
Multiple Goals ◽  
And Task

Controlling “feel” when operating a power-assist robot is important for improving robot operability, user satisfaction, and task performance efficiency. Autonomous adjustment of “feel” is considered with robots under impedance control, and reinforcement learning in adjustment when a task includes repetitive positioning is discussed. Experimental results demonstrate that an operational “feel” pattern appropriate for positioning at a goal is developed by adjustment. Adjustment assuming a single fixed goal is expanded to cases including multiple goals, in which it is assumed that one goal is chosen by a user in real time. To adjust operational “feel” to individual goals, an algorithm infers the goal. The same result as that for a single fixed goal is obtained in experiments, but experimental results suggest that design must be improved to where the accuracy of inference to the goal is taken into account by the adjustment learning algorithm.

Effects of marijuana, cocaine, and task performance on cardiovascular responsivity.

1987 ◽  
Author(s):  
Richard W. Foltin ◽  
Richard M. Capriotti ◽  
Margaret A. McEntee ◽  
Marian W. Fischman
Keyword(s):  
Task Performance ◽  
And Task

Beyond individual affect: Group affect and task performance

2007 ◽  
Author(s):  
Annefloor H. M. Klep ◽  
Barbara van Knippenberg ◽  
Henk van der Flier ◽  
Annebel H. B. de Hoogh
Keyword(s):  
Task Performance ◽  
And Task

Optimism specificity, affective incongruity, and task performance

2011 ◽  
Author(s):  
Justin A. Wellman ◽  
Andrew L. Geers ◽  
Nicole D. Fairless ◽  
Sara R. Cicchinelli ◽  
Heather J. Pase ◽  
...  
Keyword(s):  
Task Performance ◽  
And Task
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