Observer variability in posture assessment from video recordings: The effect of partly visible periods
© 2016 Elsevier Ltd Observers rank partly visible postures on video frames differently than fully visible postures, but it's not clear if this is due to differences in observer perception. This study investigated the effect of posture visibility on between-observer variability in assessments of...
| Main Authors: | , , , |
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| Format: | Journal Article |
| Published: |
Elsevier
2017
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| Online Access: | http://hdl.handle.net/20.500.11937/68793 |
| _version_ | 1848761891251290112 |
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| author | Trask, C. Mathiassen, Svend Rostami, M. Heiden, M. |
| author_facet | Trask, C. Mathiassen, Svend Rostami, M. Heiden, M. |
| author_sort | Trask, C. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2016 Elsevier Ltd Observers rank partly visible postures on video frames differently than fully visible postures, but it's not clear if this is due to differences in observer perception. This study investigated the effect of posture visibility on between-observer variability in assessments of trunk and arm posture. Trained observers assessed trunk and arm postures from video recordings of 84 pulp mill shifts using a work sampling approach; postures were also categorized as ‘fully’ or ‘partly’ visible. Between-worker, between-day, and between-observer variance components and corresponding confidence intervals were calculated. Although no consistent gradient was seen for the trunk, right upper arm posture showed smaller between-observer variance when all observers rated a posture as fully visible. This suggests that, partly-visible data, especially when observers disagree as to the level of visibility, introduces more between-observer variability when compared to fully visible data. Some previously-identified differences in daily posture summaries may be related to this phenomenon. |
| first_indexed | 2025-11-14T10:38:52Z |
| format | Journal Article |
| id | curtin-20.500.11937-68793 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:38:52Z |
| publishDate | 2017 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-687932018-06-29T12:35:26Z Observer variability in posture assessment from video recordings: The effect of partly visible periods Trask, C. Mathiassen, Svend Rostami, M. Heiden, M. © 2016 Elsevier Ltd Observers rank partly visible postures on video frames differently than fully visible postures, but it's not clear if this is due to differences in observer perception. This study investigated the effect of posture visibility on between-observer variability in assessments of trunk and arm posture. Trained observers assessed trunk and arm postures from video recordings of 84 pulp mill shifts using a work sampling approach; postures were also categorized as ‘fully’ or ‘partly’ visible. Between-worker, between-day, and between-observer variance components and corresponding confidence intervals were calculated. Although no consistent gradient was seen for the trunk, right upper arm posture showed smaller between-observer variance when all observers rated a posture as fully visible. This suggests that, partly-visible data, especially when observers disagree as to the level of visibility, introduces more between-observer variability when compared to fully visible data. Some previously-identified differences in daily posture summaries may be related to this phenomenon. 2017 Journal Article http://hdl.handle.net/20.500.11937/68793 10.1016/j.apergo.2016.12.009 Elsevier restricted |
| spellingShingle | Trask, C. Mathiassen, Svend Rostami, M. Heiden, M. Observer variability in posture assessment from video recordings: The effect of partly visible periods |
| title | Observer variability in posture assessment from video recordings: The effect of partly visible periods |
| title_full | Observer variability in posture assessment from video recordings: The effect of partly visible periods |
| title_fullStr | Observer variability in posture assessment from video recordings: The effect of partly visible periods |
| title_full_unstemmed | Observer variability in posture assessment from video recordings: The effect of partly visible periods |
| title_short | Observer variability in posture assessment from video recordings: The effect of partly visible periods |
| title_sort | observer variability in posture assessment from video recordings: the effect of partly visible periods |
| url | http://hdl.handle.net/20.500.11937/68793 |