scholarly journals Using tripartite group area as a measure of social interactions in pre-school children: A pilot study

2021 ◽  
Author(s):  
Masashi Tsukamoto ◽  
Airi Tsuji ◽  
Satoru Sekine ◽  
Takahide Omori ◽  
Kenji Suzuki ◽  
...  
Keyword(s):  
Social Interactions ◽  
Motion Capture ◽  
Low Cost ◽  
Subjective Evaluation ◽  
Free Play ◽  
Typically Developing ◽  
Group Area ◽  
Staff Members ◽  
Motion Capture Systems ◽  
Social Behaviours

AbstractThis study aimed to measure tripartite group area using motion capture systems and investigated whether group area could be used as a measure of pre-school children’s social interactions. In Experiment 1, two typically developing girls and an adult staff member engaged in free play. In Experiment 2, two typically developing boys and two adult staff members played balloon volleyball. Both experiments had three types of measures: subjective evaluation of whether participants played together, social behaviours (e.g. eye contact for Experiment 1 and balloon tosses for Experiment 2) and group area. Results showed that group area was significantly and negatively related to subjective evaluation in Experiment 2, whereas we observed no relationship between subjective evaluation and group area in Experiment 1. Overall, however, only a low correlation was observed between subjective evaluation and group area in Experiment 2. Furthermore, there were strong sequential associations between subjective evaluation and social behaviour, rather than between subjective evaluation and group area. Although group area as an index of social interactions is less accurate than behavioural data directly observed by humans, it may be worth using as a low-cost preliminary measure, since it can be automatically calculated using motion capture systems.

scholarly journals Typically Developing Preschoolers’ Behavior Toward Peers With Disabilities in Inclusive Classroom Contexts

2019 ◽  
Vol 42 (1) ◽  
pp. 49-68
Author(s):  
Soo-Young Hong ◽  
Jungwon Eum ◽  
Yanjie Long ◽  
Chaorong Wu ◽  
Greg Welch
Keyword(s):  
Social Interactions ◽  
Free Play ◽  
Inclusive Classroom ◽  
Typically Developing ◽  
Typically Developing Children ◽  
Outdoor Classroom ◽  
Group Activities ◽  
And Training ◽  
Indoor And Outdoor ◽  
Small Group Activities

This study aimed to investigate typically developing preschoolers’ behavior toward peers with disabilities in inclusive classrooms, focusing on the co-occurrence of the interactions between children with and without disabilities with various classroom contexts. Behaviors of 22 typically developing preschoolers were observed and coded on two different days in both indoor and outdoor classrooms during free play, small group activities, transitions, and meals/snack. Typically developing children interacted with peers with disabilities for a small amount of time; the interactions were significantly more likely in the outdoor classroom, in either child- or teacher-directed activities, and in play activities. There was a lack of adults’ intentional scaffolding for social interactions between children with and without disabilities even when they were near the children. Activity contexts contribute to children’s social behavior, and teachers need more support and training with inclusive and collaborative practices.

scholarly journals Comparison of the Performance of the Leap Motion ControllerTM with a Standard Marker-Based Motion Capture System

Sensors ◽  
2021 ◽  
Vol 21 (5) ◽  
pp. 1750
Author(s):  
Amartya Ganguly ◽  
Gabriel Rashidi ◽  
Katja Mombaur
Keyword(s):  
Motion Capture ◽  
Gold Standard ◽  
Low Cost ◽  
Ring Finger ◽  
Healthcare Services ◽  
Leap Motion ◽  
Motion Capture System ◽  
Flexion Extension ◽  
Standard Marker ◽  
Motion Capture Systems

Over the last few years, the Leap Motion Controller™ (LMC) has been increasingly used in clinical environments to track hand, wrist and forearm positions as an alternative to the gold-standard motion capture systems. Since the LMC is marker-less, portable, easy-to-use and low-cost, it is rapidly being adopted in healthcare services. This paper demonstrates the comparison of finger kinematic data between the LMC and a gold-standard marker-based motion capture system, Qualisys Track Manager (QTM). Both systems were time synchronised, and the participants performed abduction/adduction of the thumb and flexion/extension movements of all fingers. The LMC and QTM were compared in both static measuring finger segment lengths and dynamic flexion movements of all fingers. A Bland–Altman plot was used to demonstrate the performance of the LMC versus QTM with Pearson’s correlation (r) to demonstrate trends in the data. Only the proximal interphalangeal joint (PIP) joint of the middle and ring finger during flexion/extension demonstrated acceptable agreement (r = 0.9062; r = 0.8978), but with a high mean bias. In conclusion, the study shows that currently, the LMC is not suitable to replace gold-standard motion capture systems in clinical settings. Further studies should be conducted to validate the performance of the LMC as it is updated and upgraded.

scholarly journals Next-Generation Low-Cost Motion Capture Systems Can Provide Comparable Spatial Accuracy to High-End Systems

2013 ◽  
Vol 29 (1) ◽  
pp. 112-117 ◽  
Author(s):  
Dominic Thewlis ◽  
Chris Bishop ◽  
Nathan Daniell ◽  
Gunther Paul
Keyword(s):  
Motion Capture ◽  
Low Cost ◽  
Three Dimensional ◽  
Gait Kinematics ◽  
Occupational Tasks ◽  
Soft Tissue Artifact ◽  
New Generation ◽  
The Impact ◽  
Linear Accuracy ◽  
Motion Capture Systems

The objective quantification of three-dimensional kinematics during different functional and occupational tasks is now more in demand than ever. The introduction of new generation of low-cost passive motion capture systems from a number of manufacturers has made this technology accessible for teaching, clinical practice and in small/medium industry. Despite the attractive nature of these systems, their accuracy remains unproved in independent tests. We assessed static linear accuracy, dynamic linear accuracy and compared gait kinematics from a Vicon MX-f20 system to a Natural Point OptiTrack system. In all experiments data were sampled simultaneously. We identified both systems perform excellently in linear accuracy tests with absolute errors not exceeding 1%. In gait data there was again strong agreement between the two systems in sagittal and coronal plane kinematics. Transverse plane kinematics differed by up to 3° at the knee and hip, which we attributed to the impact of soft tissue artifact accelerations on the data. We suggest that low-cost systems are comparably accurate to their high-end competitors and offer a platform with accuracy acceptable in research for laboratories with a limited budget.

Low Cost Markerless Motion Capture Systems: A Comparison Between RGB Cameras and RGB-D Sensors

2020 ◽  
Author(s):  
Andrea Vitali ◽  
Daniele Regazzoni ◽  
Caterina Rizzi ◽  
Giorgio Lupi
Keyword(s):  
Motion Capture ◽  
Low Cost ◽  
Research Work ◽  
Microsoft Kinect ◽  
Lower Limbs ◽  
Specific Context ◽  
Depth Sensors ◽  
Research Fields ◽  
Markerless Motion Capture ◽  
Motion Capture Systems

Abstract In the last years, the advent of low-cost markerless motion capture systems fostered their use in several research fields, such as healthcare and sport. Any system presents benefits and drawbacks that have to be considered to design a Mocap solution providing a proper motion acquisition for a specific context. In order to evaluate low-cost technology, this research work focuses on the evaluation of the accuracy of two categories of devices: the RGB active cameras and the RGB-D, or depth sensors devices. In particular, GoPro Hero 6 active cameras and Microsoft Kinect v2 devices have been selected as representative of the two categories. In particular, this work evaluates and compares the performances of the two systems used to track the position of human articulations. The two devices have been chosen among those available on the market after a state of the art has been completed. Before starting with the campaign of acquisition, the number of sensors and their layout have been designed to optimize the acquisition with both mark-less Mocap systems. Their comparison is based on a list of specific movements of upper and lower limbs. Each movement has been acquired simultaneously, to guarantee the same test conditions. The results have been organized, compared and discussed by evaluating performances and limitations of both solutions related to specific context of use. Conclusions highlight the best candidate technology.

Low-cost motion capture systems in practice

2012 ◽  
Vol 15 (sup1) ◽  
pp. 253-255 ◽  
Author(s):  
Clint Hansen ◽  
Jean-Louis Honeine ◽  
David Gibas ◽  
Nasser Rezzoug ◽  
Philippe Gorce ◽  
...  
Keyword(s):  
Motion Capture ◽  
Low Cost ◽  
Motion Capture Systems

scholarly journals Upper Limb Physical Rehabilitation Using Serious Videogames and Motion Capture Systems: A Systematic Review

Sensors ◽  
2020 ◽  
Vol 20 (21) ◽  
pp. 5989
Author(s):  
Andrea Catherine Alarcón-Aldana ◽  
Mauro Callejas-Cuervo ◽  
Antonio Padilha Lanari Bo
Keyword(s):  
Systematic Review ◽  
Motion Capture ◽  
Upper Limb ◽  
Low Cost ◽  
Physical Rehabilitation ◽  
Upper Limb Rehabilitation ◽  
Measurement Units ◽  
Meta Analyses ◽  
Limb Rehabilitation ◽  
Motion Capture Systems

The use of videogames and motion capture systems in rehabilitation contributes to the recovery of the patient. This systematic review aimed to explore the works related to these technologies. The PRISMA method (Preferred Reporting Items for Systematic reviews and Meta-Analyses) was used to search the databases Scopus, PubMed, IEEE Xplore, and Web of Science, taking into consideration four aspects: physical rehabilitation, the use of videogames, motion capture technologies, and upper limb rehabilitation. The literature selection was limited to open access works published between 2015 and 2020, obtaining 19 articles that met the inclusion criteria. The works reported the use of inertial measurement units (37%), a Kinect sensor (48%), and other technologies (15%). It was identified that 26% used commercial products, while 74% were developed independently. Another finding was that 47% of the works focus on post-stroke motor recovery. Finally, diverse studies sought to support physical rehabilitation using motion capture systems incorporating inertial units, which offer precision and accessibility at a low cost. There is a clear need to continue generating proposals that confront the challenges of rehabilitation with technologies which offer precision and healthcare coverage, and which, additionally, integrate elements that foster the patient’s motivation and participation.

Motion Capture for Human-Centered Simulation Using Kinects

2013 ◽  
Author(s):  
Chinmay P. Daphalapurkar ◽  
Wenjuan Zhu ◽  
Ming C. Leu ◽  
Xiaoqing F. Liu ◽  
Alpha M. Chang ◽  
...  
Keyword(s):  
Motion Capture ◽  
Low Cost ◽  
Microsoft Kinect ◽  
Frame Rate ◽  
Infrared Light ◽  
Aircraft Fuselage ◽  
Light Pattern ◽  
Human Movements ◽  
Shutter Mechanism ◽  
Motion Capture Systems

Microsoft Kinect is capable of tracking human movements and can be used to develop various human-centered simulations. It is very attractive for certain applications because it is a low-cost, marker-less device. This paper presents our research toward characterizing the accuracy of Kinect and developing Kinect-based motion capture systems. Besides a single-Kinect system, a motion capture system with multiple Kinects were developed in order to increase the tracking volume and to improve the simulation fidelity. A motor-driven shutter mechanism was developed for use with each Kinect for the multi-Kinect system to address the issue of interference on the infrared light pattern without lowering the frame rate. The capabilities of the developed Kinect-based motion capture systems are demonstrated by tracking a human in performing a fastening operation on an aircraft fuselage mockup.

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