2026-04-14T03:16:33Zhttps://recercat.cat/oai/request

oai:recercat.cat:2072/4423572025-05-08T09:38:48Zcom_2072_98col_2072_378192

00925njm 22002777a 4500 dc Sene Mir, Ana M. author Portell Vidal, Mariona author Anguera Argilaga, María Teresa author Chacón-Moscoso, Salvador author 2020 This study aimed to assess the effect of systematic self-observation, hetero-observational feedback, and feedforward and intrinsic feedback (SsObserWork components) on workers' knowledge and behaviour of a manual material handling (MMH) technique in the industrial sector. Blue-collar workers recruited from a food processing company in Catalonia (Spain) were randomized into SsObserWork (N = 31) and control (N = 30) groups. SsObserWork group members participated individually in two sessions and a three-week follow-up between sessions where they received the SsObserWork components. The control group participated individually in two sessions where they received a standard MMH training. An ad hoc instrumentcalled the MMH-SsObserWork instrument was used to assess the MMH behaviour, and an adaption of the instrument was done to assess the workers' knowledge. Significant differences were found between groups for the identification of recommended back positions in the first session and also on comparing both sessions. However, no differences were found for the rest of the criteria. There also were significant differences between groups in the score changes of the back, knee joints, elbow joints, and interaction criterion, indicating that the SsObserWork group improved the MMH performance in these criteria (behaviour). SsObserWork intervention showed a positive effect on improving the knowledge and behaviour of the MMH technique, specifically on back posture. Observation Self-observation Hetero-observation Feedback Feedforward Manual material handling Knowledge Behaviour Workplace intervention SsObserWork Manual material handling training : the effect of self-observation, hetero-observational and intrinsic feedback on worker's knowledge and behaviour