Saari, J (1989) The effect of positive feedback on industrial housekeeping and accidents; A long‐term study at a shipyard.
Country	FI
Aim	To determine effects of performance feedback on housekeeping behavior and on injuries over a longer period.
Target population	Occupation: Manufacture of other transport equipment; shipyard workers/both
	Industry: C—Manufacturing
	Setting: 11 Industrial site
	Firm size: 10–49 (small)
Study design	ITS with comparison conditions: 2. Serial measures with internal control
	Unit of analysis: Group/organizational level
	Sample size: 64 workers, four foremen, two production engineers; multiple housekeeping indicators collected as an index.
Type of intervention	3.3 Multifaceted across individual and organizational levels
Evaluation design	Duration of intervention: Feedback for 8 weeks
	Duration of follow‐up: 3 = Medium‐term (12–36 months)
	Type of outcome measure: Injury
Study quality	Moderate quality