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Development and validation of a behavioral video coding scheme for detecting mental workload in manual assembly

Tijdschriftbijdrage - Tijdschriftartikel

Manual assembly in the future Industry 4.0 workplace will put high demands on operatorsU+2019 cognitive processing. The development of mental workload (MWL) measures therefore looms large. Physiological gauges such as electroencephalography (EEG) show promising possibilities, but still lack sufficient reliability when applied in the field. This study presents an alternative measure with a substantial ecological validity. First, we developed a behavioural video coding scheme identifying 11 assembly behaviours potentially revealing MWL being too high. Subsequently, we explored its validity by analysing videos of 24 participants performing a high and a low complexity assembly. Results showed that five of the behaviours identified, such as freezing and the amount of part rotations, significantly differed in occurrence and/or duration between the two conditions. The study hereby proposes a novel and naturalistic method that could help practitioners to map and redesign critical assembly phases, and researchers to enrich validation of MWL-measures through measurement triangulation.
Tijdschrift: Ergonomics
ISSN: 0014-0139
Issue: 1
Volume: 64
Pagina's: 78 - 102
Jaar van publicatie:2021