Human Factors

Articles from Vol. 41, No. 3, September

Aging, Motor Control, and the Performance of Computer Mouse Tasks
Because of the increased presence of computers in work and everyday life and the demographic "graying" of America, there is a need for interface designs that promote accessibility for older people. This study examined age differences in the performance...
Critique of "Distance Estimation with Night Vision Goggles: A Little Feedback Goes a Long Way"
The Editor invited me to critique the previous article in a "critique-rebuttal" format. Consistent with an approach adopted earlier (Maddox,1996), I aim to foster a positive and informative scholarly exchange. The article has several strengths....
Distance Estimation with Night Vision Goggles: A Little Feedback Goes a Long Way
Immediate feedback was given to correct observers' estimates of distance in an experiment in which those estimates were made outdoors at night while observers wore night vision goggles (NVGs). Initially observers made unguided estimates of distances...
Effectiveness of an Intervention to Increase Construction Workers' Use of Hearing Protection
In this project we tested the effectiveness of a theory-based intervention (video, pamphlets, and guided practice session) to increase the use of hearing protection devices (HPDs) among Midwestern construction workers and a national group of plumber/pipefitter...
Effects of Cueing and Knowledge of Results on Workload and Boredom in Sustained Attention
Two models of recently reported high workload associated with vigilance tasks are the direct-cost and indirect-cost views. The former attributes high workload to the need for continuous observation in discriminating signals from neutral events; the...
Effects of Head-Slaved and Peripheral Displays on Lane-Keeping Performance and Spatial Orientation
To improve the efficiency of images presented in low-cost vehicle simulators, the virtual viewing direction (i.e., the direction in which the image is rendered) can be head-slaved, the display can be surrounded with a less detailed peripheral image,...
Modeling Computer Interest in Older Adults: The Role of Age, Education, Computer Knowledge, and Computer Anxiety
We proposed a mediation model to examine the effects of age, education, computer knowledge, and computer anxiety on computer interest in older adults. We hypothesized that computer knowledge and computer anxiety would fully mediate the effects of age...
Older Observers' Tolerance of Optical Blur: Age Differences in the Identification of Defocused Text Signs
To determine if visual aging affects the ability to identify blurred text signs in daytime or nighttime viewing conditions, the photopic and mesopic legibility thresholds of young and old adult observers were compared at three levels of optically induced...
Perceptual Ability with Real-World Nighttime Scenes: Image-Intensified, Infrared, and Fused-Color Imagery
We investigated human perceptual performance allowed by relatively impoverished information conveyed in nighttime natural scenes. We used images of nighttime outdoor scenes rendered in image-intensified low-light visible ([i.sup.2]) sensors, thermal...
Regression Models for Predicting Peak and Continuous Three-Dimensional Spinal Loads during Symmetric and Asymmetric Lifting Tasks
Most biomechanical assessments of spinal loading during industrial work have focused on estimating peak spinal compressive forces under static and sagittally symmetric conditions. The main objective of this study was to explore the potential of feasibly...
Rehearsal versus Map Study as Preparation for a Flight Navigation Exercise
A flight simulator and a computer-generated depiction of an environment with both natural and cultural features were used to teach and test navigation knowledge. Conditions of guided rehearsal, unguided rehearsal, and map study were used to familiarize...
Target-Directed Head Movements in a Head-Coupled Virtual Environment: Predicting the Effects of Lags Using Fitts' Law
Two experiments have investigated the effects of lag on discrete target-directed head movements in a virtual environment. Both the target and a head-slaved pointer (subjected to lag) were presented on a head-mounted display. Target-directed head movements...
The Art of Descrying Distance
"How does distance look?" is a simple direct question. It extends from a spaceless within to the edge of what can be loved. It depends on light. (Carson, A., 1998, page 43) How naive can one experiment be? Imagine asking observers to judge distance...
Three Studies Testing the Effects of Role Models on Product Users' Safety Behavior
Three studies were conducted to determine the effect of a role model's safety behavior on observers' safety behavior. In Studies 1 and 2, role models (confederates) used a cleaning product requiring them to wear safety gloves. Study 1 examined observers'...
Visual Search of Food Nutrition Labels
Using an eye-tracking methodology, we evaluated food nutrition labels' ability to support rapid and accurate visual search for nutrition information. Participants (5 practiced label readers and 5 nonreaders) viewed 180 trials of nutrition labels on...
Wrist and Forearm Postures of Users of Conventional Computer Keyboards
The aim of this study was to perform a comprehensive investigation to document wrist and forearm postures of users of conventional computer keyboards. We instrumented 90 healthy, experienced clerical workers with electromechanical goniometers to measure...