Andrea H Mason

Andrea H Mason
University of Wisconsin–Madison | UW · Department of Kinesiology

Ph.D.

About

54
Publications
3,872
Reads
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437
Citations
Additional affiliations
January 2002 - present
University of Wisconsin–Madison
September 1997 - December 2001
September 1995 - May 1997
University of Waterloo
Education
September 1997 - December 2001
Simon Fraser University
Field of study
  • Kinesiology
September 1995 - May 1997
University of Waterloo
Field of study
  • Kinesiology
September 1990 - May 1995
University of Waterloo
Field of study
  • Systems Design Engineering

Publications

Publications (54)
Article
This study was designed to extend research on motor skill development in autism spectrum disorder using a dual-task skill. Nine autistic and 18 non-autistic youths walked without grasping or while reaching to grasp a small or large object. Step extremity ratio, percent time in double support, and normalized speed were quantified. We hypothesized th...
Article
Full-text available
Quantification of gait changes in response to altered environmental stimuli may allow for improved understanding of the mechanisms that influence gait changes and fall occurrence in older adults. This study explored how systematic manipulation of a single dimension of one’s environment affects spatiotemporal gait parameters. A total of 20 older adu...
Article
Reaching and grasping are often completed while walking, yet the interlimb coordination required for such a combined task is not fully understood. Previous studies have produced contradictory evidence regarding preference for support of the lower limb ipsilateral or contralateral to the upper limb when performing a reaching task. This coordinative...
Article
Visual feedback about one’s own movements can be important for effective performance in natural and computer-generated environments. Previous work suggested that, for young adults, performance in virtual environments was influenced by the presence of a crude representation of the hand in a task-specific fashion. The current study was performed to d...
Article
Full-text available
Reaching and grasping (prehension) is one of the earliest developing motor skills in humans, but continued prehension development in childhood and adolescence enables the performance of increasingly complex manual tasks. In individuals with autism spectrum disorder (ASD) atypical unimanual reaching and grasping has been reported, but to date, no st...
Article
Background: Postural stability difficulties are commonly reported in people on the autism spectrum. However, it is unclear whether unsteady surfaces may exacerbate postural stability difficulties in children and adolescents with autism spectrum disorder (ASD). Understanding balance on unsteady surfaces is important because uneven surfaces are comm...
Article
Full-text available
The present study examined the effects of a visual-based biofeedback training on improving balance challenges in autism spectrum disorder (ASD). Twenty-nine youth with ASD (7–17 years) completed an intensive 6-week biofeedback-based videogame balance training. Participants exhibited training-related balance improvements that significantly accounted...
Conference Paper
Full-text available
Autism is a developmental disorder characterized by atypical social interactions and repetitive behaviors/restricted interests[1]. It is found that children with autism also experience delayed or impaired motor skills development [2]. It would be advantageous to develop methods that precisely evaluate these motor skills impairments. The use of robo...
Article
This study examined how individuals with and without neck pain performed exercises under the influence of altered visual feedback in virtual reality. Chronic neck pain (n=9) and asymptomatic (n=10) individuals were recruited for this cross-sectional study. Participants performed head rotations while receiving programmatically manipulated visual fee...
Article
Background: The aim of this study was to evaluate working volume as a potential assessment metric for open surgical tasks. Methods: Surgical attendings (n = 6), residents (n = 4), and medical students (n = 5) performed a suturing task on simulated connective tissue (foam), artery (rubber balloon), and friable tissue (tissue paper). Using a motio...
Article
The aim of this study was to investigate how tissue characteristics influence psychomotor planning and performance during a suturing task. Our hypothesis was that participants would alter their technique based on tissue type with each subsequent stitch placed while suturing. Surgical attendings (n = 6), residents (n = 4), and medical students (n =...
Article
Full-text available
The completion of many goal oriented skills requires the tight coordination of the right and left hands to achieve the task objective. Although the coordination of wrist transport and orientation of the hand before object contact has been studied in detail for discrete bimanual tasks, as yet, very few studies have examined bimanual coordination whe...
Article
The aim of this study was to evaluate validity evidence using idle time as a performance measure in open surgical skills assessment. This pilot study tested psychomotor planning skills of surgical attendings (n = 6), residents (n = 4) and medical students (n = 5) during suturing tasks of varying difficulty. Performance data were collected with a mo...
Article
The purpose of this experiment is to investigate the fine motor performance of young and older adults on a reach to grasp task in a desktop virtual environment with increasing precision requirements. Aging brings about potential loss of an individual’s function due to disease, injury, or the degenerative nature of aging itself. Three-dimensional vi...
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Full-text available
The performance of many everyday activities requires the coordination of the two upper limbs to achieve the goal of the task. Although bimanual performance has been studied in detail in adults, few studies have examined how children coordinate the movements of the two hands during symmetric and asymmetric bimanual prehension. With the current study...
Conference Paper
Full-text available
Interaction and interface design for the young and the elderly has become an important research topic. The purpose of the research described here is to characterize motor performance in virtual environments across the lifespan. Participants between the ages of 7 and 90 years simultaneously reached to pick up two objects with their right and left ha...
Conference Paper
Full-text available
Age-specific design principles for three dimensional virtual environment systems are sparse. Given that sensorimotor control systems change across the lifespan, understanding age differences in motor performance within virtual environments is crucial to designing effective, usable interfaces. This paper investigates the effect of luminance contrast...
Article
The modeling of human movement is vital for a complete understanding of complex human-computer interaction. As three-dimensional collaborative tangible user interfaces (TUIs) evolve, research is needed to understand how people physically interact with each other within a virtual environment. Previous study of physical collaboration in virtual envir...
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Full-text available
Task-switching paradigms have generally been used to investigate cognitive processes involved in decision making or allocating attention. This work extended the task-switching paradigm into the motor domain in order to investigate the consequences of an unexpected environmental perturbation on reaction time and movement time. Typically, task-switch...
Article
In this series of studies on the coordination of the two hands during a bimanual perturbation task, 10 right-handed volunteers were asked to reach to grasp and lift two illuminated cubic objects. Upon initiation of the reach a perturbation could occur by extinguishing one or both objects and illuminating new objects located directly away from the s...
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Recent accounts describe the online control of goal directed movement as collaboration between processes of predictive forward-modeled control and spatiotemporally constrained feedback-driven control. Two experiments are presented that evaluate the impact background motion has on these two control processes. In each experiment, performers made aimi...
Article
Full-text available
This work explores how people use visual feedback when performing simple reach-to-grasp movements in a tabletop virtual environment. In particular we investigated whether visual feedback is required for the entire reach or whether minimal feedback can be effectively used. Twelve participants performed reach-to-grasp movements toward targets at two...
Article
An experiment was designed to investigate the temporal and spatial couplings of the transport and grasp components for bimanual movements performed by children. Thirty-one participants aged 4-6 (younger) and 7-10 (older) performed the unimanual task of reaching for, grasping, and lifting a small or large cylinder with the right or left hands or the...
Article
Two experiments were designed to investigate the temporal and spatial couplings of the transport and grasp components for bimanual movements to both congruent and incongruent targets. We studied conditions where task requirements were largely different for the two hands. Ten participants performed Experiment 1 and were required to reach for, grasp,...
Article
The performance of bimanual movements involving separate objects presents an obvious challenge to the visuo-motor system: Visual feedback can only be obtained from one target at a time. To overcome this challenge overt shifts in visual attention may occur so that visual feedback from both movements may be used directly (Bingham, Hughes, & Mon-Willi...
Article
Full-text available
The purpose of the present study was to investigate the coordination of the two effectors when one or both targets were displaced in a bimanual prehension task. Sixteen right-handed volunteers were asked to reach 20 cm to grasp and lift two cubic objects with the right and left hands. Upon initiation of the reach: (1) both objects could remain at t...
Article
Full-text available
In the present series of experiments we investigated how object transport and rotate movements are performed when they are directed away from (Experiment 1) and toward (Experiment 2) the body under both unimanual and bimanual conditions. Our results indicated that unimanual conditions are faster and more efficiently produced than bimanual movements...
Article
By manipulating task action demands in 2 experiments, the author investigated whether the context-dependent effects seen in unimanual multiphase movements are also present in bimanual movements. Participants (N = 14) in Experiment 1 either placed or tossed objects into targets. The results indicated that the intention to perform a subsequent action...
Article
In this series of experiments, we investigated whether a crude representation of the hand that was extinguished at movement onset improved performance when compared to a no-feedback situation. Subjects performed simple reach to grasp movements in a virtual environment in two experiments. In Experiment 1, trials were blocked so that subjects were aw...
Article
Full-text available
In virtual environments users must rely on synthetically created feedback to plan and control movements as naturally as possible. To investigate the role of synthetic graphical feedback about one's own movements in a virtual environment, thirteen university students reached to grasp target objects in a table-top virtual environment. These movements...
Article
Full-text available
The goal of the present study was to investigate how grip forces are applied when transferring stable control of an object from one person to another. We asked how grip forces would be modified by the passer to (1) control for inertial forces as the object was transported toward the receiver and (2) control for the impending perturbation when the r...
Article
Full-text available
This work explored how the presence of graphical information about self- movement affected reach-to-grasp movements in an augmented environment. Twelve subjects reached to grasp objects that were passed by a partner or rested on a table surface. Graphical feedback about self-movement was available for half the trials and was removed for the other h...
Conference Paper
Full-text available
This work explored how the presence of visual information about self-movement affected grasp forces when receiving an object from a partner. Twelve subjects either reached to grasp or grasped without reaching objects that were passed by a partner or rested on a table surface. Visual feedback about self-movement was available for half the trials and...
Conference Paper
Full-text available
This work explores how the availability of visual and haptic feedback affects and kinematics of reaching performance in a tabletop virtual environment. Eight subjects performed reach-to-grasp movements toward target objects of various sites in conitions where visual and haptic feedback were either present or absent. It was found that movement time...
Article
To effectively design computer simulations for interactive shared environments, we first need to understand what basic sensory information is required by people collaborating in these environments. Experiments have been proposed to investigate how sensory information is used in the generation of simple collaborative movements in both natural and de...
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Full-text available
To e&ctively design computer simulations of shared environments, an understanding is needed of the basic informational requirements and underlying movement patterns generated by two people collaborating in these environments. Results from this study indicate that when passing objects in a natural environment, the fundamental movement patterns seen...
Article
Full-text available
The goal of the present study was to understand which characteristics (movement time or velocity) of target motion are important in the control and coordination of the transport and grasp-preshape components of prehensile movements during an interception task. Subjects were required to reach toward, grasp and lift an object as it entered a target a...
Article
Full-text available
This work explored how people use visual feedback when performing simple reach-to-grasp and object transfer tasks in a tabletop virtual environment. Visual feedback about the index finger and thumb was provided in three conditions: vision available throughout the movement, vision available until movement onset, or vision absent throughout the movem...

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