Abstract:This is an open access article under the terms of the Creat ive Commo ns Attri butio n-NonCo mmerc ial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.
“…Activity performance was videotaped with two tablets. Video observation was chosen as gold standard [ 12 , 13 ] for the comparison to SENS to assess the concurrent validity. Fig.…”
The study aims to assess the concurrent validity of the SENS motion® accelerometer system for device-based measurement of physical activity and sedentary behavior in healthy children and adolescents. Thirty-six healthy children and adolescents (mean ± standard deviation (SD) age, 10.2 ± 2.3 years) were fitted with three SENS sensors while performing standardized activities including walking, fast walking, sitting/lying, and arm movements. Data from the sensors were compared with video observations (reference criteria). The agreement between SENS motion® and observation was analyzed using Student’s t-test and illustrated in Bland–Altman plots. The concurrent validity was further evaluated using intraclass correlation coefficient (ICC) and was expressed as standard error of measurement (SEM) and minimal detectable change (MDC). Strong agreement was found between SENS and observation for walking time, sedentary time, and lying time. In contrast, moderate agreement was observed for number of steps, sitting time, and time with and without arm movement. ICC2.1 values were overall moderate to excellent (0.5–0.94), with correspondingly low SEM% for walking time, sedentary time, lying time, and time with arm movement (2–9%). An acceptable SEM% level was reached for both steps and sitting time (11% and 12%). For fast walking time, the results showed a weak agreement between the measurement methods, and the ICC value was poor.Conclusion: SENS motion® seems valid for detecting physical activity and sedentary behavior in healthy children and adolescents with strong agreement and moderate to excellent ICC values. Furthermore, the explorative results on arm movements seem promising.
What is Known:• Inactivity and sedentary behavior follow an increasing trend among children and adolescents.• SENS motion®seems to be valid for measuring physical activity and sedentary behavior in adults and elderly patients.
What is New:• SENS motion®seems valid with strong agreement between video observations and SENS measurement, and ICC values are moderate to excellent when measuring physical activity and sedentary behavior in healthy children and adolescents.• SENS motion®seems promising for detection of arm movements.
“…Activity performance was videotaped with two tablets. Video observation was chosen as gold standard [ 12 , 13 ] for the comparison to SENS to assess the concurrent validity. Fig.…”
The study aims to assess the concurrent validity of the SENS motion® accelerometer system for device-based measurement of physical activity and sedentary behavior in healthy children and adolescents. Thirty-six healthy children and adolescents (mean ± standard deviation (SD) age, 10.2 ± 2.3 years) were fitted with three SENS sensors while performing standardized activities including walking, fast walking, sitting/lying, and arm movements. Data from the sensors were compared with video observations (reference criteria). The agreement between SENS motion® and observation was analyzed using Student’s t-test and illustrated in Bland–Altman plots. The concurrent validity was further evaluated using intraclass correlation coefficient (ICC) and was expressed as standard error of measurement (SEM) and minimal detectable change (MDC). Strong agreement was found between SENS and observation for walking time, sedentary time, and lying time. In contrast, moderate agreement was observed for number of steps, sitting time, and time with and without arm movement. ICC2.1 values were overall moderate to excellent (0.5–0.94), with correspondingly low SEM% for walking time, sedentary time, lying time, and time with arm movement (2–9%). An acceptable SEM% level was reached for both steps and sitting time (11% and 12%). For fast walking time, the results showed a weak agreement between the measurement methods, and the ICC value was poor.Conclusion: SENS motion® seems valid for detecting physical activity and sedentary behavior in healthy children and adolescents with strong agreement and moderate to excellent ICC values. Furthermore, the explorative results on arm movements seem promising.
What is Known:• Inactivity and sedentary behavior follow an increasing trend among children and adolescents.• SENS motion®seems to be valid for measuring physical activity and sedentary behavior in adults and elderly patients.
What is New:• SENS motion®seems valid with strong agreement between video observations and SENS measurement, and ICC values are moderate to excellent when measuring physical activity and sedentary behavior in healthy children and adolescents.• SENS motion®seems promising for detection of arm movements.
“…Video observational methodologies using video observational equipment in the absence of a researcher, have been used widely for decades and have been found to have enormous benefits including objectivity, reliability, and opportunities for detailed analysis (16). However, there are challenges with video observational methods related to camera reactivity in which children get distracted by the cameras and participants, in general, change their behaviour because of camera awareness.…”
BackgroundExisting research has shown that the parent-adolescent relationship and its associated communication and interaction styles are important for adolescent development and outcomes. Measuring parent-adolescent communication and interaction using self-report methods has substantial research limitations. Video observational methodologies offer a novel and more objective approach to measuring parent-adolescent communication and interaction from the point of view of participants. This study aims to explore the feasibility and acceptability of this methodology, and analysis using automated coding software in an urbanized context.MethodsThis study recruited parent-adolescent pairs in Soweto, South Africa which included 11–15-year-old adolescents and their biological parents. Parent-adolescent communication and interactions were measured using novel video observational portable head cameras called “Teencams”. Feasibility was evaluated by testing three observational game tasks (Matching pairs card game, Jenga and Charades) to stimulate communication and interaction between 16 parent-adolescent pairs, and the Teencam's ability to record video and audio content. Acceptability was explored using one-on-one interviews with the parents (n = 14), on whether they found the Teencam comfortable to wear, whether the parents believed their adolescents acted naturally, and which observational game tasks were feasible during their interactions. The videos were analysed using automated coding software called FaceReader which detects and codes basic facial expressions.ResultsThe Teencam methodology was found to be feasible and acceptable amongst parent-adolescent pairs in Soweto, South Africa. The Matching pairs card game stimulated excellent interaction and communication with good video and audio quality. Some feasibility limitations were identified in the operations (switching on/off and starting recording), the ability of the device to cope with the movement of the participants, and the lighting conditions of the room, all of which resulted in poor coding and analytic output from FaceReader. Refinements and adjustments were made to the methodological protocol by improving the head cameras and lighting conditions and refining the Matching pairs card game, which resulted in improved analytic output from FaceReader.ConclusionBased on these findings, a methodological protocol was developed to measure parent-adolescent interaction and communication in an urban setting. The unique contribution of this research lies in its potential to lead to improved methodologies for measuring parent-adolescent communication and interactions.
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