A comparison of the upper limb movement kinematics utilized by children playing virtual and real table tennis

Bufton, Amy; Campbell, Amity; Howie, Erin K.; Straker, Leon

doi:10.1016/j.humov.2014.08.004

Cited by 16 publications

(18 citation statements)

References 32 publications

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“…With these measures, we found that the systematic addition of the naturalistic task’s components into the standard task still maintained strong concurrent validity, and supports previous findings (Danion and Sarlegna, 2007). While more detailed kinematic analyses of the hand’s path or individual limb segments/joints may have provided additional insights, we did not constrain movement patterns in order to afford self-selection in movement strategy and to allow the motion to be as naturalistic as possible (Reinkensmeyer, 2010); thus, the current study design likely yielded highly variable joint coordination patterns within and between participants (Adams et al, 2015; Bufton et al, 2014; Gates et al, 2012; Petuskey et al, 2007; Srinivasan and da Silva, 2011; Wisneski and Johnson, 2007) and multiple planning mechanisms (Desmurget et al, 1997; Scheidt and Rymer, 2000), which is consistent with goal-directed movement in daily life (Bailey et al, 2014). We therefore restricted our analyses to global temporal and spatial variables of the end effector in this study.…”

Section: Discussionmentioning

confidence: 99%

Testing the concurrent validity of a naturalistic upper extremity reaching task

Schaefer

Hengge

2015

Exp Brain Res

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Point-to-point reaching has been widely used to study upper extremity motor control. We have been developing a naturalistic reaching task that adds tool manipulation and object transport to this established paradigm. The purpose of this study was to determine the concurrent validity of a naturalistic reaching task in a sample of healthy adults. This task was compared to the criterion measure of standard point-to-point reaching. Twenty-eight adults performed unconstrained out-and-back movements in three different directions relative to constant start location along midline using their nondominant arm. In the naturalistic task, participants manipulated a tool to transport objects sequentially between physical targets anchored to the planar workspace. In the standard task, participants moved a digital cursor sequentially between virtual targets, veridical to the planar workspace. In both tasks, the primary measure of performance was trial time, which indicated the time to complete 15 reaches (five cycles of three reaches/target). Two other comparator tasks were also designed to test concurrent validity when components of the naturalistic task were added to the standard task. Spearman’s rank correlation coefficients indicated minimal relationship between the naturalistic and standard tasks due to differences in progressive task difficulty. Accounting for this yielded a moderate linear relationship, indicating concurrent validity. The comparator tasks were also related to both the standard and naturalistic task. Thus, the principles of motor control and learning that have been established by the wealth of point-to-point reaching studies can still be applied to the naturalistic task to a certain extent.

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Section: Discussionmentioning

confidence: 99%

Testing the concurrent validity of a naturalistic upper extremity reaching task

Schaefer

Hengge

2015

Exp Brain Res

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“…Ebrahimi et al (2016) showed that participants were more accurate performing a reaching task in the real world compared to the virtual world. Bufton, Campbell, Howie, and Straker (2014) showed that when playing the same game (ping-pong) in the real world or in a virtual setting, participants exhibited different movement patterns across the two modalities. Their findings suggest that the difference in movement patterns may interfere with learning the real-world motor skill.…”

Section: Chapter Fourmentioning

confidence: 99%

Examining the effects of altered avatars on perception-action in virtual reality.

Day¹,

Ebrahimi²,

Hartman³

et al. 2019

Journal of Experimental Psychology: Applied

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In virtual reality avatars are animated graphical representation of a person embedded in a virtual environment. Previous research has illustrated the benefits of having an avatar when perceiving aspects of virtual reality. We studied the effect that a non-faithful, or altered, avatar had on the perception of one's action capabilities in VR. In Experiment 1, one group of participants acted with a normal, or faithful, avatar and the other group of participants used an avatar with an extended arm, all in virtual reality. In Experiment 2, the same methodology and procedure was used as in Experiment 1, except only the calibration phase occurred in VR, while the remaining reaches were completed in the real world. All participants performed reaches to various distances. The results of these studies show that calibration to altered dimensions of avatars is possible after receiving feedback while acting with the altered avatar. Further, calibration occurred more quickly when feedback was initially used to transition from a normal avatar to an altered avatar than when later transitioning from the altered avatar arm back to the normal avatar arm without feedback. The implications of these findings for training in virtual reality simulations and transfer back to the real world are also discussed. iii DEDICATION This dissertation is dedicated to my family, Michael, Ingrid, and Kendall Day, all of whom have provided unwavering support, encouragement, and love throughout my entire life. Thank you for everything-I love you guys so much. I would like to thank my committee chair, Dr. Chris Pagano, for his assistance and guidance throughout this project, from developing a topic and writing the proposal to collecting the data and writing the defense. I am sincerely grateful for everything that you have done for me during my time at Clemson. I also would like to thank my committee members for their support. I truly appreciate all of your assistance and guidance. Specifically, I would like to thank Dr. Moore for his time, encouragement, and mentorship regarding statistics. I would also like to thank, Leah Hartman, my lab mate, for her assistance in everything I have done at Clemson-we make quite the team. In addition, I want to thank my mentor, Dr. Harry Heft. Without your help, I would not have been able to find my passion for this subject matter and your guidance in my academic career is invaluable. Finally, I would once again like to thank my family and friends for their support and encouragement throughout the years I have been working on this project. iv

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“…Their performance (score) during each game at each data collection time point was included as an extraneous variable. AVG performance was evaluated as there may have been substantial gains in AVG skill without transfer to real-world skills (Bufton et al, 2014). Each game was played against a computer generated avatar on the easiest level and included a warm up period (length detailed below) where research staff provided encouragement and technique/game instruction where necessary.…”

Section: Additional Variablesmentioning

confidence: 99%

“…Therefore, the Kinect and Sony AVG systems, which use camera motion monitors to input full body movements, might be a more suitable AVG for home based DCD intervention. Given that movement fidelity has been demonstrated to differ between AVG consoles (Bufton, Campbell, Howie, & Straker, 2014), the use of multiple consoles would also allow a range of movement stimulations.…”

Section: Introductionmentioning

confidence: 99%