Partly visible periods in posture observation from video: Prevalence and effect on summary estimates of postures in the job
© 2015 Elsevier Ltd and The Ergonomics Society. This paper investigated the extent to which observers rated clearly visible postures on video differently from partly visible postures, and whether visibility affected full-shift posture summaries. Trunk and upper arm postures were observed from 10,413...
| Main Authors: | , , |
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| Format: | Journal Article |
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Elsevier
2015
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| Online Access: | http://hdl.handle.net/20.500.11937/68593 |
| _version_ | 1848761841867554816 |
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| author | Trask, C. Mathiassen, Svend Rostami, M. |
| author_facet | Trask, C. Mathiassen, Svend Rostami, M. |
| author_sort | Trask, C. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2015 Elsevier Ltd and The Ergonomics Society. This paper investigated the extent to which observers rated clearly visible postures on video differently from partly visible postures, and whether visibility affected full-shift posture summaries. Trunk and upper arm postures were observed from 10,413 video frames representing 80 shifts of baggage handling; observers reported postures as fully or only partly visible. Postures were summarized for each shift into several standard metrics using all available data, only fully visible frames, or only partly visible frames. 78% of trunk and 70% of upper arm postural observations were inferred. When based on all data, mean and 90th percentile trunk postures were 1.8° and 5.6° lower, respectively, than when based only on fully visible situations. For the arm; differences in mean and 90th percentile were 0.7° and 8.2°. Daily posture summaries were significantly influenced by whether partly visible postures are included or not. |
| first_indexed | 2025-11-14T10:38:05Z |
| format | Journal Article |
| id | curtin-20.500.11937-68593 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:38:05Z |
| publishDate | 2015 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-685932018-06-29T12:35:01Z Partly visible periods in posture observation from video: Prevalence and effect on summary estimates of postures in the job Trask, C. Mathiassen, Svend Rostami, M. © 2015 Elsevier Ltd and The Ergonomics Society. This paper investigated the extent to which observers rated clearly visible postures on video differently from partly visible postures, and whether visibility affected full-shift posture summaries. Trunk and upper arm postures were observed from 10,413 video frames representing 80 shifts of baggage handling; observers reported postures as fully or only partly visible. Postures were summarized for each shift into several standard metrics using all available data, only fully visible frames, or only partly visible frames. 78% of trunk and 70% of upper arm postural observations were inferred. When based on all data, mean and 90th percentile trunk postures were 1.8° and 5.6° lower, respectively, than when based only on fully visible situations. For the arm; differences in mean and 90th percentile were 0.7° and 8.2°. Daily posture summaries were significantly influenced by whether partly visible postures are included or not. 2015 Journal Article http://hdl.handle.net/20.500.11937/68593 10.1016/j.apergo.2015.02.001 Elsevier restricted |
| spellingShingle | Trask, C. Mathiassen, Svend Rostami, M. Partly visible periods in posture observation from video: Prevalence and effect on summary estimates of postures in the job |
| title | Partly visible periods in posture observation from video: Prevalence and effect on summary estimates of postures in the job |
| title_full | Partly visible periods in posture observation from video: Prevalence and effect on summary estimates of postures in the job |
| title_fullStr | Partly visible periods in posture observation from video: Prevalence and effect on summary estimates of postures in the job |
| title_full_unstemmed | Partly visible periods in posture observation from video: Prevalence and effect on summary estimates of postures in the job |
| title_short | Partly visible periods in posture observation from video: Prevalence and effect on summary estimates of postures in the job |
| title_sort | partly visible periods in posture observation from video: prevalence and effect on summary estimates of postures in the job |
| url | http://hdl.handle.net/20.500.11937/68593 |