Partly visible periods in posture observation from video: Prevalence and effect on summary estimates of postures in the job
MetadataShow full item record
© 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.
Showing items related by title, author, creator and subject.
Observer variability in posture assessment from video recordings: The effect of partly visible periodsTrask, C.; Mathiassen, Svend; Rostami, M.; Heiden, M. (2017)© 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 ...
Goh, K.; Morris, Susan; Lee, W.; Ring, A.; Tan, Tele (2017)© 2017 Springer-Verlag Berlin HeidelbergPerturbation-evoked responses (PERs) to a physical perturbation of postural stability have been detected using electroencephalography (EEG). Components of these responses are ...
Predicting Directly Measured Trunk and Upper Arm Postures in Paper Mill Work From Administrative Data, Workers' Ratings and Posture ObservationsHeiden, M.; Garza, J.; Trask, C.; Mathiassen, Svend (2017)Objectives: A cost-efficient approach for assessing working postures could be to build statistical models for predicting results of direct measurements from cheaper data, and apply these models to samples in which only ...